Dynafit Speed Radical Backcountry Skiing Binding – 2012/13

Post by WildSnow.com blogger | November 7, 2012      
2012-13 Dynafit Speed Radical

2012-13 Dynafit Speed Radical. New anti rotation feature, nicely installed leash anchor, toe unit with Power Towers and strong springs, enlarged RV numbers. We're impressed. Click all images to enlarge.

After all the contortions we’ve been through with the Dynafit Radical bindings over the past year, it’s nice to see a mature state of design take hold. That’s especially true of the Speed Radical. Indeed, I’m thinking this binding might be the sweet spot in the whole Dynafit binding lineup. It’s light and comparatively low to the ski, has an elegant anti-rotation feature while still using the easy-flip heel risers. More, it appears to take some semi-stock modifications. Check it out.

Breakdown of Speed Radical showing anti rotation features.

Breakdown of Speed Radical showing anti rotation features. This year's binding has molded notches that engage when you twist the heel unit to touring position. They engage lightly, then more strongly when you weight the binding due to inherent flex in the binding housing. Ingenious if it works, and it appears to function just fine. Moreover, the center spindle appears to engage the heel release spring in a firm way when you've rotated to the climbing position, thus creating even more resistance to rotation. At the right, arrows indicate legacy moldings inside the housing for the failed anti-rotation pin system they used last year.

Anti rotation notches, detail, backcountry skiing binding known as Speed Radical.

Anti rotation notches, detail. A tag as well as printing on the Dynafit Speed Radical says only rotate clockwise, but that's obviously a legacy thing. Rotate any way you want.

Here is something interesting. You can use the base plate from a Radical ST toe to reduce ramp angle.

Here is something interesting. You can use the base plate (and longer screws) from a Radical ST toe to reduce ramp angle. Available as a part from Salewa NA? We shall see. B&D Ski Gear has shim plates as well.

Downsides? No available brakes. Leashes need a safety breakaway link. Aluminum center post “spindle” still has the hole the failed anti-rotation pin used to fit in. We’d prefer to see that gone as it could be a weak point in the post. I tried to be picky but can’t find anything else to complain about.

A few other features we like: Comes with a primo pair of safety leashes you can easily mod to your own specs. Screws are star drive (yes, we’re now fans). Length adjustment screw still has a Posidrive head, no need to carry yet another tool. Stack height is lower than Radical FT/ST. Bump that interferes with heel clearance on Radical FT/ST is trimmed, actually making this a better performing binding in our opinion. In other words, yeah, this might be the sweet spot.

Weight of one binding: 13.2 ounces, 374 grams. Toe unit weighs 5.6 oz 158 g. All weights with screws and crampon fitting. Crampon fitting can be left uninstalled (watch screw length if you do that), it weighs 8 grams.

Shop for Dynafit Speed Radical ski binding.

Here are the details if you want a toe plate for less ramp angle. I’m not sure which retailers will carry the plates, but you can get them from Dynafit NA. Remember if you do this you’ll need a set of 8 longer front screws of the type used for Radical FT/ST toe unit.


FRONT BASE PLATE (SPACER) ST 48580 9999 $15.00
FRONT BASE PLATE (SPACER) FT 48581 9999 $20.00


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158 Responses to “Dynafit Speed Radical Backcountry Skiing Binding – 2012/13”

  1. Chris November 7th, 2012 8:19 am

    Great looking binding! do you know if it is possible to fit a Radical heel riser onto a Vertical? have you tried someting like that?

  2. Mike November 7th, 2012 8:31 am

    What’s the stack/delta numbers on this, stock? Measured weight?

  3. Rich November 7th, 2012 8:37 am


    Any chance you’ll be comparing to this seasons “Plum”?
    (you’ll have to imagine Im saying that with a french accent!)

  4. Brian November 7th, 2012 9:00 am

    I’m new to AT and buying bindings for the first time this year …

    about the leash … when would you want it? Wouldn’t want it in avy terrain, correct?

    Is that what the breakaway leash you spoke about would be for?

  5. Dave Field November 7th, 2012 9:11 am

    I’m still waiting for a machined or forged aluminum heel piece body and a simple means of dis-engaging heel pins to switch to touring mode without exiting toe piece.

  6. Charlie November 7th, 2012 9:34 am

    New anti-rotation notches are very cool; may they work well in practice! If combined with the original TLT design, we’d be back to one-moving-part nirvana for heel risers.


    Well-cast plastic heels can be very strong and are less dense; has anyone ever seen them break? (not the post or the heel riser, but the actual cast body?).

  7. Gray Petty November 7th, 2012 9:54 am

    Lou or anyone,

    Will the Speed radical work with the radical ST base plate with brakes?

    It would give the option of having a brake if one was wanted for resort skiing and allow removal for less weight for touring. Admittedly it would be finiky change-over but could be worth it if using the same bindings on separate skis.


  8. Dave Field November 7th, 2012 10:31 am

    I know the non-brake Dynafit quick release technique well, however I imagine at some point its wearing or stressing something in a bad way compared o the intended design.

    Regarding plastic, it can be lighter and plenty strong when new. Most plastics degrade from UV over time and I wonder how long my original TLT plastic heelpieces will hold up? I’ve not seen it personally but there are reports of the dyanfit plastic housings cracking and I have seen the barrel adjustment threads cross thread and strip easily. I’d take a 50 gram weight penalty for something more robust and potentially longer lasting, especially at the retail prices we’re currently subject to.

  9. kevin November 7th, 2012 1:52 pm

    Leashes, I don’t need no stinking leashes. Except that ski resorts require some kind of retention device. Brakes or straps. Also in glaciated terrain it would be pretty sad to lose a ski. Personally, glacier travel is the only place I wear straps. My local ski area does not seem to notice the lack of brakes or straps when I am using the lifts to start a tour. Different people have different levels of comfort about their retention. Personally I am not very retentive.

  10. Lou Dawson November 7th, 2012 2:03 pm

    Just got back from more work at Field HQ, thanks for the comments everyone, I’ll get some numbers up in a moment. Yeah, I messed up. We should never publish a review without weights!

  11. Juergen November 7th, 2012 2:17 pm

    Dynafit obviously seeks to squeeze all options out of their current production molds. Bit milling on the baseplate mold, bit milling on the housing mold – et voila: anti rotation notches ! Let the customer give it a try ..

  12. Lou Dawson November 7th, 2012 2:22 pm

    I just added the optional toe plate/riser info to the post. Here are the details in a comment as well:


    FRONT BASE PLATE (SPACER) ST 48580 9999 $15.00
    FRONT BASE PLATE (SPACER) FT 48581 9999 $20.00

  13. Lou Dawson November 7th, 2012 2:28 pm

    Weights added to post. Here they are in a comment, sorry I forgot to include them — was excited to catch another sunny day for our last winter improvements up at Field HQ.

    Weight of one Dynafit Speed Radical binding: 13.2 ounces, 374 grams. Toe unit weighs 5.6 oz 158 g. All weights with screws and crampon fitting. Crampon fitting can be left uninstalled, it weighs 8 grams.

  14. Lou Dawson November 7th, 2012 2:30 pm

    Juergen, indeed, pretty smart. Too bad they didn’t apply the same brain power to the original “pin” anti rotation solution. But whatever, it’s tough to get everything right the first time when you’re dealing with such a strict ration of weight/performance. Lou

  15. AVIATOR November 7th, 2012 2:31 pm

    @ kevin
    good luck with that when your skis release, hit and injure a kid at your local ski area… 🙁

  16. Juergen November 7th, 2012 2:47 pm

    Lou, I’ve just checked your pics of Radical ST in a prior thread and It seems to me that there’s no space on the ST baseplace to add a notches solution – do you agree ?

  17. Claude November 7th, 2012 2:54 pm

    New anti-rotation notches should work well, but do we have the need of it ?? in more than 15 years skiing with tech bindings (Dynafit and Plum) I havent seen any accidental rotation…So is it a real improvement or just a commercial addition ?

    And about the use of the leash, it is agood question and for now, i think the perfect system does not exist.
    For myself, i use a personal leash, resistant enough to avoid loosing a ski after a fall, but weak enough to be broken in case of avalanche.

    Ski safe and have fun.

  18. Lou Dawson November 7th, 2012 3:08 pm

    Claude, I’d agree rotation can be a non-issue, but accidental rotation is an issue for lots of people. From what I see, this solution will probably eliminate it as it’s a _combination_ of the notches as well as a firm position the heel unit rotates to. It’s nicely done.

  19. Lou Dawson November 7th, 2012 3:09 pm

    Juergen, don’t over-think it, the ST/FT brake plate is in the way of the notch solution… Lou

  20. Lou Dawson November 7th, 2012 3:14 pm

    Gray, I don’t quite understand what you’re asking.

    You could use a Radical ST heel with a Speed Radical toe, and you’d essentially end up with extreme ramp angle and a brake.

    Or, if you’re asking if you can swap a Speed Radical heel unit on top of an ST base plate so you have a brake? No, the rear unit housing has to have a tab that motivates the brake retractor plate. The Speed Radical does not have this tab.

    To put it another way, a Speed Radical with a brake is simply a Radical ST, it’s that simple. Other than the brake and added stack height of the ST, the two bindings are nearly identical.


  21. Brian November 7th, 2012 3:15 pm


    I was wondering the same thing. Can you take the baseplate and brake from a radical ST and fit the Speed radical heel to it. Lou?

  22. Lou Dawson November 7th, 2012 3:17 pm

    Brian, we posted at the same time, do you see the comment just before yours? Let me know. Thanks, Lou

  23. Brian November 7th, 2012 3:23 pm

    Right. I think Gray’s question (and mine) was the second, if you could swap the heel unit onto a ST base plate. Those are available aftermarket fairly cheaply.

    If that tab is not there though, guess that’s not possible.

  24. Lou Dawson November 7th, 2012 3:36 pm

    Exactly, you need the “tab” on the ST/FT heel to operate the brake. No free lunch for you bargain hunters in that regard (grin). Lou

  25. Lou Dawson November 7th, 2012 3:43 pm

    All, regarding the Plum bindings, they do look beautiful and we tried to detail in a previous blog post. Problem is, Plum is super difficult to deal with in that they simply do not seem to be able to get us some samples to evaluate. I hope that changes soon, and when it does we’ll give them equal time. Lou

    Among others, most recent Plum post:

  26. Dan November 7th, 2012 4:00 pm

    Gee-Whiz info for skiers not all that familiar with Dynafit bindings: Regarding brakes: In addition to the obvious reason for brakes…they make stepping into the binding when on snow, ice, etc. much easier, which is significant if one is yo-yoing…not all that big of a deal for one-run days.

  27. TonyBob November 7th, 2012 4:19 pm

    Lou and friends,

    You posted the prices for ST and FT base plates with part numbers and prices earlier in this thread. Where did you get that information? I’ve been all over the Salewa NA page as well as the Dynafit global page and could’nt find information like that. I’d like to look for additional things like replacement parts for both ski boots and bindings straight from the source.

    Thanks for the help,

  28. Lou Dawson November 7th, 2012 4:43 pm

    Hi Tony, we have insider access! Our mission is to use that and share the resulting info!

    But you can always try calling Dynafit NA…

    ‘best, Lou

  29. TonyBob November 7th, 2012 4:49 pm

    Thanks Lou,
    I’ll do that.

  30. Gray November 7th, 2012 5:03 pm

    Thanks Lou, and Brian for interpreting my question.

    I was wondering about swapping the heel unit to the ST baseplate. It would be nice not only from a cost standpoint but from a functionality standpoint- you could have the brakes when you wanted and take them off when you didn’t.
    I guess going to the Vertical if you can find them is an option if you want removable brakes.

    Thanks again for the quick answer.

  31. travis November 7th, 2012 7:53 pm

    Salewa stepped up and provided the anti-rotation tabs for ’11/12 Radical ST/FT buyers. Will they also provide new heel units for ’11/12 Radical Speed buyers, or are we stuck with a failed beta test binding?

  32. OrangeShark November 7th, 2012 11:05 pm

    These bindings are really great and feel very comfortable, They look pretty cool too!!

  33. christian November 8th, 2012 1:49 am

    I have never had much problem with auto-rotation during the 12+ years I have used dynafit – until last weekend that is. My 2012 Radical FTs started rotating when climbing with the highest heel lift…. not sure what was going on, but I will get it fixed. I allways believed this was just a user issue, but the rotation was happening every 5th meter…very annoying. Looking forward to get it remedied.

    I used to have speed/low tech (1999/2000 version), but I did not feel comfortable with the leashes, so I installed breakes – it was a nice option to have…sorry to see that dynafit went away from that.
    (Sorry for being off topic…as the issue wasn’t with the speed).

  34. Lou Dawson November 8th, 2012 4:49 am

    Christian, no worries about the topic drift as the anti-rotation issue is important. In my opinion, nearly anyone with the Radical FT/ST should remove the rotation stop pin and install the external ant rotation stops on the brake plate. Unless that’s already been done at the dealer or factory. Lou

  35. Lou Dawson November 8th, 2012 4:54 am

    Travis, I have no idea how they’re dealing with the earlier Speed Radical in terms of the problematic anti-rotation pin system. At the least. they’ll provide the upgraded pin. In terms of upgrading, that would require both the upper housing and the base plate, which is nearly the whole rear binding. Considering tear-down and assembly time, simply swapping for the latest complete heel units is probably the way to go if a person does want to upgrade. Again, I have not heard if Dynafit has any sort of program for this. I’ll ask, and so can you guys so if you hear anything let us know here. Thanks, Lou

  36. AVIATOR November 8th, 2012 3:30 pm

    maruelli has anti rot solutions for both the tlt speed and the speed radical

  37. travis November 8th, 2012 3:42 pm

    Aviator – I spent $75 on Maruelli’s fix for the ST/FT series and then Salewa sent me their fix for free. If anyone wants 2 pair of Maruelli’s fix, I’ll sell em cheap.

    For the Speed, if Salewa doesn’t come through, I can fab-up my own external stop easy enough.

  38. Greg Louie November 9th, 2012 9:38 am

    The Speed Radical is the sweet spot in Dynafit’s binding lineup for sure. Too bad it doesn’t have a RV of 12 . . . .

  39. Biggsie November 9th, 2012 8:25 pm

    I used these with the ST toe riser plates all last year. Love ’em. The hole pattern pairs well with Marker Griffon/Jesters if you want to use inserts for max flexibility.

  40. John S November 10th, 2012 7:13 am

    I’m wondering if it’s possible to retrofit the new-style climbing risers to the previous generation ST?

  41. John J November 10th, 2012 9:28 am

    Slightly OT, but I heard that the Verticals will be discontinued. I don’t believe I read it here, though. With all the grumbling about non-removable brakes, auto-rotation, and anti-rotation, I may need to consider my binding acquisition strategy. What do you have to say about this, Lou?

  42. Lou Dawson November 10th, 2012 11:17 am

    John, I heard they already quit making the Vertical series Dynafit bindings. If you want something with brakes, I’m still a big advocate of the recent Dynafit FT. If you buy it with the wider brakes you get the stronger toe springs, mandatory to use the FT with power blocks to support the oddly designed toe with the metal that hangs in space.

    1. If you don’t need removable brakes, the latest Radical FT/ST bindings have all problems solved as much as all our testing can find up to now.

    2. If you don’t like brakes, you can’t remove them from the Radical FT or ST and have it perform properly in terms of anti rotation.

    3. If you don’t want brakes, you can use a Speed Radical, but you only get RV 10.

    4. If you want an RV 12 Speed Radical, you could probably swap in the springs from a Radical FT heel unit. But that would seem absurd.

    5. There may be a way to home brew an anti rotation for the Radical FT/ST that does not require a brake. People are working on this.

    6. If you want to remove the “permanent” Radical FT/ST brake mechanically, here is the blog post. http://www.wildsnow.com/8470/radical-dynafit-brake-removal/

  43. Pieter November 10th, 2012 2:30 pm

    Hi all,

    I’ve been reading for a while, first time comment, with a very broad question that requires a preface.

    I’m keen to start skiing the backcountry. I skied purely alpine/resort for about fifteen years starting at age 5, but am now in my 40s and haven’t skied since, except for a little groomed cross country in Denmark. My primary area would be the Sierra Nevada, but I’d also get out for quick days in whatever southern California snow presents itself (San Bernardino Mtns, San Gabriels if we get enough snow, Mt. Pinos, etc.). I’m already a mountaineer and climber and in all other respects have solid skills in the mountains, in snow, but my main interest with skiing is touring and/or mild ski mountaineering. Currently, I have no desire to ski couloirs or anything gnarly. It’s more an alpine cross country interest, and means to get to harder objectives which I’m inclined to climb without skis. Also, just to snow camp. And, eventually, to do some of the trans-Sierra tours.

    Before building a quiver, I’d probably also be using it for occasional inbound skiing at Mammoth, and maybe a couple SoCal resorts.

    The question is gear: the debates seem pretty hot about the right skis and boots. Some advocate fat skis, some not so fat. Stiffer boots–not so stiff. Etc.

    Help! No sooner do I feel like I’ve got a handle on things than I’m bewildered all over again.

    I’ve already done a lot of research, and have ideas about what I’m looking at (along the lines of Dynafit Speed bindings, Scarpa Maestrale, Dynafit TFT 5, Garmont Cosmos or similar for boots, Dynafit or Trab or similar skis), but I’m still unknowledgeable enough to have my mind radically changed.

    With all other mountain pursuits, I’m kind of a gram counter, so I’d prefer lighter rather than not, but I don’t want to cripple my own development with gear that’s inappropriately difficult to master.

    Finally, I will be demoing what seem like the best choices at Mammoth Mountaineering before buying.

    So for California snow, my goals, and being a BC novice, recommend an ideal package that is forgiving enough for me, but high performance enough that I won’t be frustrated half way through the season.

  44. Lou Dawson November 10th, 2012 3:39 pm

    Pieter, thanks for the comment and welcome to the Wild Snow!

    If you expect your backcountry setup to cross over to inbounds, you need to let go of the ultra light aspirations. It can be light, but too light and the muscle fatigue of multiple runs has a detrimental effect on your propioception and balance when you don’t have as much boot or ski.

    In other words, go for a boot such as Meastrale RS or Dynafit One that provides fairly stiff feel but has good walking cuff articulation. For bindings/resort, you need brakes. Straps are kind of stupid when you’re getting on and off trams and gondolas, not to mention the skis kind of hurt when they’re attached to you and you take a fall, and since you are doing more vert at resorts, you will as a matter of ratio take more falls. So for binders, just go with something like a Dynafit Radical, which will give you the joy of the tech system but with brakes.

    Skis? Again, it’s got to cross over. Any of the “freeride” capable latest sticks will cross very nicely. Pick something out of our Ultimate Quiver that’s more on the beef side.

    Does above give you a hint: If you want the joy of lightweight touring gear, get a setup for touring and for the resort get a resort setup. You can use the touring setup at the resort once in a while to get used to it, or for sidecountry with uphilling. But trying to go really light as well as resort capable is not that easy.

    Look at it this way. Do you use a fork to eat soup, or a spoon to dice onions? Just like your kitchen has more than one tool, so should your ski rack.


  45. Pieter November 10th, 2012 6:37 pm


    Thank you so much. That’s outstanding. Probably some of the best advice I’ve received from various different sources.

    Geez…this means though that now I have to think about resort skis! I have no idea where to begin with that!

    Okay, so back to my above question, heeding your advice, I’ll throw this back out there and say that the setup I’m looking for would be exclusively for backcountry, and light.

    Any and all comments would be very welcome.

    Thanks again Lou!


  46. Lou Dawson November 10th, 2012 7:01 pm

    Pieter, resort skis are simple. Rent for a while then buy what you like, on sale at end of season.

    For the 100% backcountry setup, go with a light weight tech binding such as Speed Radical or Plum, pair with a light boot such as we’ve already suggested. Buy a light medium width ski, see Ultimate Quiver for ideas. One bargain is the Voile Vector… or try to find some K2 Waybacks… If you’re more traditional and don’t want rocker, Manaslu or anyting from Trab…

    To trim more weight and get a more fluid feel going uphill, check out boots such as Dynafit TLT 5, La Sportiva Spitfire, etc.

    There you go.


  47. Hank November 11th, 2012 9:20 am

    What kinds of break away leashes are people using with brakeless tech bindings? I want the speed radicals for my wailer 99’s but I can’t help but think it’s crazy to have no stopping mechanism on a $1200 pair of skis and I also can’t help but think it’s crazy to have your skis attached in avy terrain!!!

  48. Brian November 11th, 2012 10:50 am

    “4. If you want an RV 12 Speed Radical, you could probably swap in the springs from a Radical FT heel unit. But that would seem absurd.”

    Why would that be absurd?

  49. Lou Dawson November 11th, 2012 10:55 am

    Because you’d have to rob the springs from a Radical FT and thus ruin it, and you could just use the Radical FT heel unit… but perhaps absurd is too strong a word. At mod central here at WildSnow HQ, some of our little projects have been called “absurd,” (grin), and yes I can see how one might want the RV 12 in their Speed Rads due to issues such as stack height and the heel lifters. That said, at that point why not just run an FT without brakes…


  50. Terry November 11th, 2012 10:01 pm

    Hank, these work well – http://www.bndskigear.com/skileash.html

  51. Jasper November 12th, 2012 2:26 pm

    Hello All,

    So I just picked up some carbon megawatts, and am up in the air for which bindings to use. I have been running original megawatts with vertical FT bindings for the past few years. My new boards will probably be a mix of 50/50 BC/ChairLift skis. I am thinking I am going to use some speed radicals. Any thoughts or opinions on this speed radical carbon megawatt set up?


  52. Pieter November 12th, 2012 3:47 pm


    A belated thanks again. That sounds like the prescription then.

    I see you’ve posted a new piece on the La Sportiva boot too, so that’ll be good to consider.

    Do you think there’s any reason to be concerned about learning backcountry skiing on such a high performance setup like the types we’re talking about given that in the alpine world distinctions are made between beginner, intermediate, and advanced setups?

    Also, love this site. It’s become daily reading. Thank you!


  53. Lou Dawson November 12th, 2012 4:26 pm

    Daily? You need to visit every 3 hours (grin).

    As for being concerned about learning on the top notch gear, no concern. The main thing is to pick gear that’s appropriate for the _style_ of backcountry skiing you’re attracted to. Hybrid race gear is not going to make a freerider happy, for example. Though that freerider might enjoy cross dressing once in a while, lycra style.

  54. travis November 14th, 2012 9:39 am

    Email from Salewa says that upgrades for ’11/12 owners will have to be purchased – no surprise I guess, since the changes affect most of the heel piece. It’ll probably be cheaper and easier to just make a custom external stop for ’11/12 Speeds.

  55. Joel November 17th, 2012 4:31 pm

    Does this Speed Radical share the same template with Radical FT ?

  56. Lou Dawson November 18th, 2012 3:01 pm

    Joel, yes, I just double checked and Speed uses same hole patterns as FT/ST, though you’ll need to play around with exactly how far apart you want the toe and heel units. Basically, as when mounting earlier Dynafits, figure the toe location out first so your boot ends up on the ski where you want it. Then set heel unit at middle point of for/aft length adjustment and then located on ski using the boot as a jig for length between toe and heel. Really quite simple.

  57. Joel November 18th, 2012 3:15 pm

    Thanks! I already have Radical FTs installed with inserts and I got rid of the stiffening plate so they´ll fit the same inserts. Probably have to use shorter screws though.

  58. Lou Dawson November 18th, 2012 3:25 pm

    Joel, without the plates support the toe unit base with a glob of silicon caulk. And yeah, be careful about screw length.

    P.S., please report back. We’re impressed by the latest Speed model but would like to get some consumer feedback.


  59. Gray November 18th, 2012 3:33 pm


    While we are on the subject of hole patterns.

    Do you know if the Speed Radical has the same hole pattern as the previous Speed?


  60. Lou Dawson November 18th, 2012 4:12 pm

    Gray, of course not. All Radical models changed the previously standardized for more than 18 years toe unit hole pattern by having the front pair of holes farther forward. Lou

  61. Jasper November 19th, 2012 1:50 pm

    What is involved in removing the plate from Radical FT? Do any problems come up? How much weight do you save? Do you get to keep the brakes?

  62. Lou Dawson November 19th, 2012 2:04 pm

    If you mean the connector plate, just leave it out, saves 40 grams per binding, stick a glob of silicon caulk under toe plate to take the place of it (probably isn’t necessary, but seems like a good idea). We’ve been running them without plates for about a year now, no problem. Lou

  63. Jasper November 19th, 2012 2:28 pm

    I was referring to the whole shock absorber plate. It seems to be like it is overkill for a tech binding, and is actually deterring me from getting radical FTs.

  64. Lou Dawson November 19th, 2012 2:54 pm

    Jasper, you can just leave it out. No big deal. Lou

  65. travis November 19th, 2012 6:38 pm

    So does the FT heel with shock absorber plate removed look just like the ST heel? Or is there still something extra besides the stiffer springs?

  66. Lou Dawson November 19th, 2012 7:15 pm

    Travis, no, there will be some vestigial stuff that’s trivial. Lou

  67. Don November 20th, 2012 8:59 pm

    Lou … sorry if this is off topic. Also, I realize there is no right answer to my question. It is probably more personal than technical. I have spoken to Dynafit & K2, neither wanted to provide many specifics. I am building up a mid-winter backcountry powder set-up for here in the San Juan Mountains of Colorado. I already have K2 Coomback, Wayback, and Backup skis. I am thinking about the K2 Backdrop with Dynafit Speed Radical bindings. I don’t like brakes and I am weight minded. Dynafit was concerned the 112 under foot was a little much for the Speed binding. However, K2 was leaning towards the stiffness of the Backdrop because it is designed similar to the Wayback. I was hoping to get your opinion on this set-up in general terms if possible. Thanks!

  68. Pieter November 27th, 2012 1:20 pm

    Lou, following up on our exchange above from a couple of weeks ago, I’m firmly committed now to having two different setups, one inbounds, the other BC/AT.

    However, contrary to what I expected, I’m considering getting an inbounds setup first, rather than AT, for a few reasons: I can basically start skiing now, locally, I’ll have many friends to go with on short notice, I can include my preschool age son on occasion, and, most importantly, I’m expecting that this will help me (re)build general downhill skiing ability which I’m hoping will directly translate to a shorter learning curve on an AT setup–in a general sense.

    The question is, basically, how useful will general alpine, inbounds skiing be towards redeveloping skills that are necessary in the downhill part of AT skiing? Remember, I haven’t skied anything at all in over 15 years.

    If the plan holds, I will get in to the AT setup in a couple of months, when our backcountry has better snow and I have more local options, and hopefully, with a better skills foundation.

  69. Rod November 27th, 2012 2:28 pm

    Lou, I tried to mount a b and d toe shim under the radical ft 11 and it creates a number of problems.
    Is there another spacer I can use to reduce the ramp angle?

  70. Lou Dawson November 27th, 2012 6:17 pm

    Rod, if you have the longer screw issue figured out, just make spacers from cutting board. I’ve seen boards that were just the right thickness… Lou

  71. Mat December 3rd, 2012 2:11 am

    First off; Lou I think you’re review is great!
    I’m debating between Radical FT 12s and Radical Speeds.
    I can’t seem to find conclusive information about whether dynafit uses springs of two different stiffness’ in its radical series. Some have told me the FT12 has stiffer toe springs to match the greater heel RVs while others have told me its the same springs for FT, ST and speed.

    Thanks a lot Lou!

  72. Lou Dawson December 3rd, 2012 12:02 pm

    Hi Mat,

    In the case of the _Vertical_ model bindings, the FT with wider brakes does have a stronger toe spring. Not doubt. If used with the Power Plate supports under the binding toe, we feel the Vertical FT wide brake model is easily one of the top tech bindings ever produced. Narrower brakes can be swapped on if desired.

    In the case of _Radical_ model bindings, a hand check in the workshop shows they probably all have the same toe spring. I’ll measure with my dyno in a little while and update this if I find out different. Have to take a binding off a ski to do so. Will take a few minutes (grin). Lou

  73. Lou Dawson December 3rd, 2012 3:19 pm

    Joe and I just evaluated by feel (not scientific physics experiment using nuclear colliders and stuff, sorry) and all Radical toe springs are the SAME. Makes sense, actually. Why would they make them different on a new binding model run? Only reason they made the stiffer ones for the Vertical FT was because the old springs tended to be slightly weak for some people, at least that was the theory.

  74. Mat December 3rd, 2012 9:22 pm

    Thanks for the info Lou. That clears it right up! Makes my decision harder… Go with Radical FTs on my Praxis Protests or a speed radical with a toe shim…
    Definitely a first world problem

  75. Phillip December 11th, 2012 1:03 pm

    Lou…kind of a side bar…but this may be the binding, but I dislike leashes, I buy to mount on my 78mm Shuksan skis since I can’t find any Dynafit Vert STs with 82mm brakes…Dynafit web site shows the 82mm but doesn’t appear to be available in NA. Guess I could bend 92mm….

    As a note and as a question, I ordered the ST W/82mms from a company in Spain, SnowInn, and then was asked to send a copy of my passport before they would process the order [AmerExp card]….no way! Is that request normal? And can you recommend a contact at Dynafit Europe that I could try to order from..

    Thanks for any insights…Phil

  76. Biggsie December 11th, 2012 1:09 pm

    I had good luck with SnowInn last year and no passport was required. Weird. (and hopefully Lou has an affiliate link he can share)

  77. Jim L December 11th, 2012 2:31 pm

    I have the Vertical ST’s with 92mm brakes mounted on a pair of Atomic Skis that are 82mm wide. The brakes fold up out of the way nicely and would not be a problem on a 78mm width Ski.

  78. Phillip December 11th, 2012 2:52 pm

    Jim..thanks appreciate the info, will probably go that way…just read that the width of the Radical toe pieces might be too wide for my 2012 Shuksan and going back to 92s on Verts might be my only real option..

    Now if I could figure out that crazy @#@#$ request for a passport ID from SnowInn…spooky…..from now on I will stick to domestic vendors.

  79. Mat December 17th, 2012 7:54 pm

    Hi Lou,

    I’m a little (or a lot) paranoid about the screw retention of my Dynafit Radical FTs on my 130mm waisted skis. I’m a big guy and I like to ski hard.

    I had them mounted by a good shop so I’m sure they did it right. One thought I had was purchasing some waterproof plastic epoxy and applying a thin bead of it all around the FT baseplate where it contacts the topsheet. Do you think this would help relieve some of the stress on the screws?
    Would you have any reservations about applying epoxy in such a way?

    Thanks Lou!!


  80. Lou Dawson December 17th, 2012 9:48 pm

    Mat, it actually makes sense to bed the binding plate in a bit of epoxy while mounting, to prevent any micro-movement that could loosen the screws. But running a bead around the plate would in my opinion not do much if anything. In terms of confidence in your gear, if you don’t have it I would suggest using different ski/binding combo. Tech bindings are not for everyone, or every ski. Lou

  81. Mat December 18th, 2012 12:11 pm

    Thanks for the quick reply Lou,

    This makes sense to me.



  82. Pieter December 26th, 2012 8:59 am

    I’m not even sure how to start this status update following my long questions about getting started, but…

    I got started!

    SO STOKED!!!

    It was just a simple, mellow three hour BC trip, skinning out of the Mammoth Lodge vicinity up to a spot that normally has a view, but it was in the middle of a storm; tooled around up there in the little hillocks, practiced my kick turns, getting used to the gear, changing from ski mode to tour mode and back, etc; skied down, nice and mellow, even managed a few clumsy turns, which I could hardly believe I could pull off after so many years off skis.

    Much to my surprise, Dynafit boots ended up being the best-fitting; my feet are not exactly narrow. I also tried Aliens, the orange Garmonts (Literiders?), Rush, and maybe one other, but the TLT5s were the winner.

    I get it. The whole thing makes complete sense now. Even just looking at the gear in the shop made a lot of the remaining confusion about the tech system disappear, and adopting all the relevant methodology while out in the snow was a piece of cake.

    I love this completely. Amazing. I cannot wait to get back out this coming long weekend. Total game changer. I will never look at snow shoes again.

    Gear purchased: TLT5s, Radical ST bindings, and Manaslu skis in 169 length. Also demoed the Stokes, which were great on all the falling powder.

    Thanks to Lou and everyone else on this site who has contributed to what has quickly become an essential resource. Y’all were cited several times in Mammoth Mountaineering as a great source of knowledge by a number of people.

    Happy new year indeed!

  83. Lou Dawson December 26th, 2012 9:01 am

    Nice words Pieter! Merry Christmas!

  84. Biiggsie December 29th, 2012 6:04 pm

    Just had the top plate of one of my rear Radicals sheer off. The plate to which the heel elevators attach. Probably have 10 days on my Speed Radicals. Weird. Anyone else seen this? So not psyched on the new heel design. Guess I’ll be calling Salewa on Wed.

  85. stewspooner December 29th, 2012 7:13 pm

    I’ve been unable to adjust my new 2012/13 Dynafit Speed Radical bindings to my satisfaction. No matter what the boot-binding spacing, I can’t eliminate the obvious clunking play at both heels. It’s not enough to cause unwanted release, but a noticable and annoying lack of precision. My otherwise identical 2011/12 Dynafit Speed Radical bindings do not have this problem (adjusted half a turn tighter than the spacer). I finally got around to assessing both setups on my workbench, and when I measured and compared the spacing of the heel-piece pins with calipers, the 2012/13 pins are wider, by an amount (perhaps 0.5mm) sufficient to explain my problem. Both 2011/12 heelpiece pins and 2012/13 pins have identical spacings, which would seem to elimnate the (unlikley) possibility of damage. I’ll be following up with Dynafit/Salewa as soon as I get a day off from skiing powder, but I’m curious if you’ve any idea what might be going on. Note that my boots are new Dynafit Titan UL, and the binding mounts are perfect.

  86. Lou Dawson December 29th, 2012 11:28 pm

    Stew, that is rather strange. Let us know your outcome with Salewa, when I’m back in workshop in a few days I’ll try to remember to do some comparisons. Can you be more specific about the clunking? Lou

  87. stewspooner December 30th, 2012 7:09 am

    Lou, By clunking I mean a small (~ 1mm) amount of vertical play (pins within the inserts), with a hard limit at both ends which I can both feel and hear. I’m working long days on snow at the moment, but will share the detailed pics that I plan to send to Salewa. Seems like you had some fun times in my neighborhood (Kootenays).

  88. Biggsie December 30th, 2012 9:30 am

    Nevermind. Sounds like the heel breakage is a known issue for a small percentage of Radicals and of course Lou has a helpful thread on the topic:

  89. Lou Dawson December 30th, 2012 6:58 pm

    Thanks Stew. Do you only notice the play while riding ski lifts? Lou

  90. Arnie December 31st, 2012 8:21 am

    Hey Stew anything like this?


  91. stewspooner December 31st, 2012 7:53 pm

    Lou, the bindings are mounted on DPS Lotus 138s, which I’m using mostly for guiding cat-skiing, and the occasional lift serviced powder day. I can’t quantify any compromised performance while I’m skiing untracked powder, given that the skis are new and I don’t have a point of comparison, but the amount of play is pretty obvious whenever the ski is unweighted (such as when sitting on a lift), and I had what I’d judge an inappropriate pre-release (heel only) while skiing today.

  92. stewspooner January 1st, 2013 10:43 am

    Arnie, No. The obvious unwanted play is in the interface between the pins and the boot inserts, not moving pins.

  93. See January 1st, 2013 5:32 pm

    Probably not related to your problem, but I’ve found the Dynafit heel spacing feeler gauge is easily squished if left in between boot and binding while turning the fore/aft adjustment screw. The small plastic bumps aren’t hard enough to give accurate feedback by feel alone when turning the screw (wait till daylight if you don’t have adequate illumination). Using a squished gauge can lead to adjusting the heel piece too close to the boot which could, maybe, conceivably lead to some play at the heel. Just a wild guess.

    And Happy New Year all.

  94. stewspooner January 8th, 2013 12:33 pm

    I finally got around to borrowing some high quality (non-digital) Vernier calipers to measure what I perceived to be varying heel piece pin spacing in between two pairs of Dynafit Speed Radical bindings. I drew the calipers between the pins, to measure the distance between the inside surface of the pins at their narrowest point (just back from the end). On my 2011/12 Speed Radicals the spacings were 14.3mm and 14.4mm. For the 2012/13 model the spacings were 14.6mm and 14.7mm. For comparison I also measured my partner’s 2009/10 Vertical ST bindings at 14.5mm and 14.6mm. Now that I’ve meausured it, I’m feeling a little bit like the Princess (and the pea), but the small amount (I couldn’t work out how to measure it) of clunking play is still obvious to me in the 12/13 bindings. I e-mailed Dynafit/Salewa, but haven’t received a reply.

  95. Bob January 24th, 2013 4:11 pm

    Is the anti-rotation method in this years radical speeds working correctly? Just wanted to make sure before getting a pair.

  96. stewspooner January 27th, 2013 8:38 am

    Dynafit (Salewa) didn’t respond to my e-mail, but after speaking with a couple of guys on the phone, they didn’t acknowledge any issue, but otherwise helpful said they’d send me a couple of new heel pieces. I just received the one they sent, and measured the pin spacing at 14.6mm, exactly the same as the heel pieces I’m having issues with. In about 20 days (powder only) on the 12/13 bindings, holding back a little because of my concerns and with the RV maxed, I’ve still had 4 instances of unwanted release. In that same period I’ve had over 30 days on my 11/12 bindings, charging much harder (variable resort conditions), RV at 9, without issue. I guess I’ll just keep grinding on towards some resolution.

  97. Lou Dawson January 27th, 2013 10:56 am

    Bob, they’re working fine for me. I think I’ve had one auto-rotation in a bunch of use days. It’ll depend on conditions, how big you are, and type of boot sole, but yeah, give ’em a go. Lou

  98. Lou Dawson January 27th, 2013 11:02 am

    Stew, if I were you I’d go back to what works. Unwanted release can really hurt you There could perhaps be some issue with the Radicals and how they interface with the boot heel, but it’s most certainly not across the whole user base. If it was, we’d have the same problem here and I’d hear about it in multiple emails and comments. As it is, we’ve not had this issue with any of our test bindings, though I can always pay more attention and see if I just overlooked something. I’ll take a look once we get home from traveling. Lou

  99. Joe January 30th, 2013 11:24 am

    Is there any consensus on how wide a ski the Speed Radical can handle? I’m about to mount a set to a 115 waisted ski. I’m figuring that most of the torsional force is probably transmitted to the ski via the toe (?) and, since the Radical ST has the same footprint on the toe and is offered with a 130mm brake, I should be fine. I know lots of people are using speeds on skis this wide or wider with no problems, but some people (Dynafit?) question that and I’m the type to over think such things.

  100. Lou Dawson January 30th, 2013 11:45 am

    Joe, the issue does get blown out of proportion and involves some mythology. But it’s something to consider. I’d say it has more to do with how stiff your boots are, how big you are, and how big and heavy the skis are — along with your style of skiing.

    And yes, totally no difference between Speed Radical and other Radical series models in terms of why/how they would work with wider skis.

    Main thing is to do a good job of mounting the binding, and be aware you can damage the mount while locked into tour mode if you take a forward “knee” fall.

  101. Joe January 30th, 2013 12:16 pm

    Thanks Lou. I’m on the bigger side at 190 and skiing Garmont Radiums, but this will be a pretty much exclusively soft snow touring ski and my skiing is not too aggressive (if I can help it). I’m sure I’ll be fine.

    I’ll be using inserts, any opinions on these maybe reducing chances of pull out? I like to think the increased insert/wood interface area and bomber 72 hour epoxy I use should go a long way in this regard.

    Also, these are going on last year’s BD Justice. Listed at 1.9 kg/pair for 185cm, but mine weigh out less than 1.6 kg — gotta love that. Good sales on those now. If it had 10cm more rocker, I might be shopping for a ring 🙂

  102. Joe January 30th, 2013 12:20 pm

    Yikes, need an edit function. Make that 3.8 vs 3.6 kg on the Justices. There went all my credibility… hey, I got the “6” right.

  103. Lou Dawson January 30th, 2013 12:59 pm

    Joe, wth your style of skiing and type of snow, any problems with binding pull-out will be caused by poor mounting or previous unknown damage. Lou

  104. Biggsie January 30th, 2013 1:37 pm

    @Joe – Sound like you got things figured out but I’m running Speed Radicals on my BD Amperages (115mm waist) with Scarpa Maestrales and they’re working out just fine. For our variable Sierra snowpack, I love the extra width and rocker compared with my 100mm waisted Verdicts.

    I mounted them via Quiverkiller inserts to accept both Dynafits and Markers

  105. Jon February 4th, 2013 2:44 pm

    Lou (or anyone) The following has happened twice now and I’d like to know if anyone else has experienced this. It has happened once in Dynafit vertical’s and just the other day in Dynafit radicals. Yesterday was solid hard spring like (it is February) snow surface. I clip into the toe piece, step into the heal piece. Stomp on the snow surface to create a level spot under the ski and toe releases. The stomp on the slight incline creates a similar (or exact) force like Lou’s video ( http://youtu.be/K6cETQwh6V8 ). My partner suggested I must be entering the binding wrong leaving it susceptible to release but I now believe it to be a problem systemic to all Dynafit models. I was hoping the side towers in the Radicals would prevent the prerelease but it did not. I came close to watching my ski slide down the mountain both times. Guess that makes a good case for leashes instead of brakes in hard snow conditions. If anyone has experianced this I’d like to hear about. If not then I might have defective product.

  106. Peter Burke March 3rd, 2013 3:31 pm


    “. I clip into the toe piece, step into the heal piece. Stomp on the snow surface to create a level spot under the ski and toe releases.”

    I had similar problems with my bindings (older Vertical ST) when using brand new TLT5 boots. Turned out it was the sole rubber under the tech fittings, where you see a cutout from the factory, but it wasn’t enough and the new boots were being pushed upward in the toe piece, and with the slightest flex I had the ski pre-release. The heel gap may be another culprit – if too short, you can have the boot bounce out of the binding when stomping down after clipping in, but unless the heel gap is way off, it probably is a matter of the front boot sole.

  107. Lou Dawson March 3rd, 2013 8:25 pm

    Indeed, first thing a good tech should check is plastic or rubber touching in the wrong places. Super important.

  108. Mark Plante March 12th, 2013 5:11 pm

    Lou, I just purchased the Dynafit TLT Speed Superlite Bindings. I have two boots, the Dynafit ZZero and the La Sportiva Sideral. There is a 1.5mm difference in their lengths, that is, there is a 1.5mm difference in the heel gap when I put them in a Dynafit binding, with the ZZero being the slightly larger boot of the two. With that small of a difference, could I get by mounting this non-adjustable binding directly to the ski or do need to use Dynafit adjustment plates between the binding and ski? (The skis are BD Currents, 176cm.) I would be grateful for any advice you could provide.

  109. Lou Dawson March 12th, 2013 6:39 pm

    So in other words, if you split the difference, you’d be .75 mm out of spec? I’d say in theory that would be ok if your life depended on using both boots, but in reality you’ll never be able to mount the binding perfectly, it’ll always be a little off, so if you have an inherent error of .75, that’s going to easily grow or shrink to a mm once the binding is mounted. A mm off is too much, in my opinion. Most of us have gotten away with our “gap” being off, and I’ve seen some skiers who just set it by eye and go, but in my opinion it should be set to within .5 mm of spec using the feeler gauge. Lou

  110. Nick March 13th, 2013 12:46 pm

    So, thinking of getting the Radical Speed for my randonee setup on a pair of 188 cm K2 Sideshows, but am concerned a bit about the RV 10 max setting (I am 6’2″ and about 180-185 lbs naked, 342 mm boot sole). I would never run that high of a DIN setting, but I also know that RV and DIN are not necessarily equivalent. Based on my perusal of wildsnow, I know that appropriate retention on the tech bindings is really attained more by playing (fine-tuning) around in the range of the alpine DIN, vertical and horizontal releases adjusted differently. It seems that the vertical, if I recall correctly, sometimes has to be set above the std alpine DIN. I currently run my alpine setup as 8-8.5 depending on what I am doing, but that is with a Look-type of binding which has a lot of elasticity and will often be less likely to release when it doesn’t really need to. With the decreased to non-existent elasticity of the tech binding, I am concerned that I might end up maxing out the RV 10 on the vertical setting and still not have sufficient retention.

    What are the chances that I could be pushing the limits of the RV 10 on the speed radical. Do I need to go to the Radical FT? Thanks.

  111. Joe March 13th, 2013 1:00 pm

    Hey Nick,

    I’m in just about the same situation as you, all around, and I have no problem with the 10 release value on the ST. I run pretty much the same RV on my dynafits as the DIN on my Look Pivot 14. That said, I ski differently (more mellow) on dynafits in the BC compared to an alpine rig at the resort. So if you’re going to be bashing bumps and really pushing the limits, your mileage may vary. I reckon that most of the prerelease issues on dynafit are due to inherent limitations of the heel pin and would happen regardless of RV setting — which is why I don’t push dynafits as hard.

    — Joe

  112. Lou Dawson March 13th, 2013 1:01 pm

    Nick, if you’re thinking that way you should just mount the Radical FT, forget the cosmetic connector plate and the brake, and suddenly, it’s a Speed Radical with RV12! Lou

  113. Nick March 13th, 2013 1:29 pm

    Joe – nice to hear that. I am assuming that the RV10 on the ST Radical would be essentially equivalent to the RV 10 on the Speed Radical.

    Lou – yup, that is definitely in the mix of considerations. The only things that I would also lose out going with the “neutered” FT 😆 would be the neat ridges as an anti-rotation solution and the ability to decrease the delta with an ST/FT front plate on the Speeds. Cost is a factor too ~$170 difference taking into consideration sales and taxes.

    Decisions, decisions. Can’t wait too long or the decision will be made for me – no Speeds left here in the PNW and very few anywhere else.

  114. Nick March 13th, 2013 1:42 pm

    Oops, forgot to add in reply to Lou’s suggestion. If I drop the brake on the FT, that also gets rid of the anti-rotation device, right? So, then I have to be content with technique being the only way to avoid rotation while climbing. OTOH, not everyone has the rotation problem.

    Anyone have experience with removing the brakes on the FT and rotation issues?

  115. Biggsie March 13th, 2013 2:22 pm

    I’m 6’3″ 190# and I run my Speed Radicals on their default, out-of-the-box setting. 6 I think? I run my Marker Griffons @ 9. I might boost the RV on the Radicals a bit but don’t think I’d ever need above 10.

    FWIW, the Speed Radical heel is lower than the FT. I added ST/FT toe shims to get a flatter ramp angle. If you’d prefer not to have the crazy ramp angle typical of Dynafit, Speed Radicals might be the choice.

  116. jriph March 13th, 2013 2:54 pm

    I have the exact vertical clunking described by stewspooner on my freshly mounted 2013 but old style TLT speed with a new dynafit One boot. It seems that the largest part of the movement is in the pin to tower region. I decided not too worry too much but I just assumed this movement was normal ( my first tech setup). heel gap does not affect it btw. Is this normal or should I worry ?

  117. Lou Dawson March 13th, 2013 6:31 pm

    Jrph, me, I’d try to get it resolved, it just doesn’t seem normal. I wish I had it here to evaluate. Lou

  118. Tim K March 21st, 2013 8:56 am

    read all the comments and I’m still confused
    Had a problem yesterday with rotation. . Radical St’s, mounted on volkl Nanutag’s (awesome recommendation , thanks ) … anyhow all the local retailers and online people were out of 110 brake models , so we stripped the brakes and went to a set of B&D leashes…. a number of times(about 6) I had the heel rotate on the climb…. is there a way to “stiffen” up the rotation? or do I need to swap to a different model and put these on a narrower ski …

    Also noticed some torsional movement in the toe, with the heel free (side to side) I’m running a set of the B&D toe lifter plates.. wonder if it’s the screw length, on top to the riser plates or the wood core of the volkls “giving” with the torque.. the screws were checked and very tight

  119. Lou Dawson March 21st, 2013 7:16 pm

    Tim, having the brake jammed up under the heel unit does make it a bit more resistant to rotation. Only other way to stiffen the rotation is to set an higher torsional release value, make sure you’re setting that where you should.

    As for movement at the toe that you can see at the heel, compare to some other binding and boot combos so you get an idea of the norms.

    Re the riser plate, use plenty of epoxy to nest those screws in the lengthy holes they go through before they reach the skis.


  120. Tim K March 22nd, 2013 8:25 am

    thanks Lou… Checked the heel and it had a low release value…. I’ll get the holes filled on the lifter plates … you and the site are an amazing resource


  121. Tim K April 1st, 2013 5:11 pm

    nother question…. I need to get some cant shims under the binding plates. Jonathan Shefftz helped me out with a source, but the source is looking for screw lengths to supply longer ones to make up for the thickness.. any idea where I can find the specs? (just called dynafit, but they are closed for the night already)


  122. Lou Dawson April 1st, 2013 7:12 pm

    Tim, can’t you just measure your existing screws and add length to = that of the shim? Lou

  123. Tim K April 2nd, 2013 7:13 am

    If I’d have been smart enough to think of that, I could…. LOL… figured to have the parts in hand before taking stuff apart…. yours is a better idea… thanks

  124. Paul April 18th, 2013 1:45 pm

    Sorry if I post the same question as anyone else but it seems my situation is a bit different. I’ve got the Radical ST but I’d like to convert the heel unit to Speed Radical (removing the brakes) somehow. I know you said it was not possible to hack it but I’d like to get the original Speed heel baseplate with the spindle and mount the ST heel piece onto it instead of the original with brakes. Do you think this would work? Do I need different screw lengths or holes?

  125. Lou Dawson April 18th, 2013 6:55 pm

    Just remove the brakes. Lou

  126. Jim Warlick April 23rd, 2013 12:56 am

    Regarding pre-releases in tour mode, Dynafit TLT Comfort, 6 years old
    Skied with Black Diamond Methods

    I am having an increased frequency of pre-release while skinning with the toes locked out.

    As far as I can tell the toe piece enters releasable mode and then releases. I generally lock out to “two clicks”. What could be some contributing factors? Is it possible the bindings are becoming worn out? I have checked play in the toe pieces against a new binding and they seem very similar.

    Thanks for any input. Jim Warlick

  127. Lou Dawson April 23rd, 2013 5:41 am

    Jim, pay attention to the boot or our other ski bumping the lock lever and taking it out of locked position. This especially true if you can’t replicate problem on workbench. Lou

  128. ji warlick April 23rd, 2013 10:15 am

    Thar definitely could be it. I do stumble along sometimes. Especially in bad snow and shrubbery. Thanks, Jim

  129. Ian May 6th, 2013 9:08 am

    The Radical ST Toe Spacers are $20ea plus shipping from Dynafit. I couldn’t find anyone who had them in stock.

  130. Nick May 14th, 2013 11:22 am

    Lou and others – I have been trying to locate a pair of the updated Speed Radicals – ridges on base plate for anti-rotation rather than the internal pin. One of your advertisers has some in stock from the Spring 2012 collection. Any idea if that is the updated or older style? Thanks.

  131. Bert November 9th, 2013 4:06 pm

    Hi Lou,

    I’m reading from your post up top on Dec 12, 2012, that there is a difference in the toe spring for the Vertical FTs between models selling with wider breaks and narrower breaks. I have a pair of the Vertical FTs stock with 92mm breaks that I would like to mount on a pair of skis 114mm at the waist (with a 110mm break, of course).
    Do you think the looser springs in the toe piece of the Vertical FTs sold with narrower breaks could cause problems when mounting to wider skis? For example, leading to undesired release due to overpowering the springs. I was planning on getting the power plate, but don’t think that it would help with this issue.

    Thanks for your thoughts.

  132. Lou Dawson November 9th, 2013 5:51 pm

    Bert, I’ve stated in the past that in my opinion it’s possible the best Dynafit bindings ever made would be the Vertical FT with wide brakes and the stronger springs, mounted with the power plates.

    I can’t tell you if the weaker springs of the narrower brake model would cause you trouble (obiwhanskinobi seems to have left the building for a cocktail break). But I’d strongly recommend you go for the best setup. Skimping is not worth the consequences.


  133. Samuel November 28th, 2013 1:00 pm


    I would like to know if I could use dynafit speed radicals to ride powder or small jumps.(1-4 m).
    I’ m thinking to mount them on Line Prophet 98. Another thing I have dalbello virus lite boots and I don’t know how the toe inserts will fit with the binding. (BTW I heard that there no tight fit) is that true.
    Is there anything that I should know about mounting the binding on Prophet’s.
    Will be there any problems because Prophet’s have metal metrics inside them.
    BTW: I’m pretty light guy. 😀

    Thanks for any response.

  134. louis dawson November 28th, 2013 4:04 pm

    Hi sam, you’ll be fine with Speed Radical but do have a professional check function of boot and binding.

  135. Chuck December 3rd, 2013 9:36 am

    For the Baltoro ski which I intend on using for spring tours and speed laps up Sunlight, would you go with the Vertical ST or Radical ST binding? Speed Radicals are all sold out at the moment and besides I like the idea of brakes vs. leashes.

  136. Lou Dawson December 3rd, 2013 10:13 am

    Chuck, I’d go with the Vertical if you can still get them, that way you’ll have optional brakes so you can set the binding up in a lightweight configuration if you want. Lou

  137. Chuck December 4th, 2013 12:44 pm

    Cool. Thanks Lou. Vert ST it is. Can’t get the FT’s anymore.

  138. Larry January 24th, 2014 12:18 pm

    I have had my Speed radicals for 2 full seasons and 50+ B/C days and they have performed flawlessly. Used with bndskigear.com’s coiled leash they are a great set up. My only beef is that you have to manually turn the binding when switching modes.
    IMO it would be much easier to use this binding if the risers flipped down over the pins. Then the only time you would need to turn the binding would be on those rare occasions when you need to tour on a flat ski. (That is maybe 5% of the time for me here in BC) I know they have the Speed Superlight but it is much more expensive and does not have the sweet power tower toepieces, plus the risers are lower than the Speed radical. To me this should be the next iteration of the Speed Radicals: In line risers! Can you arrange that with Dynafit for next year Lou?

  139. Gentle Sasquatch January 24th, 2014 12:20 pm

    Great idea Larry. I too have been on radicals for 2 years. No problem. Didn’t even bother with the anti rotation pin fix.

  140. Lou Dawson January 24th, 2014 10:37 pm

    Larry, the binding is more resistant to rotation when it is turned from downhill mode and is in the touring position where the heel risers are used. It’s subtle. If you toured with a riser flipped over the pins you’d get too much auto-rotation. Lou

  141. Larry January 27th, 2014 12:47 pm

    Thanks for your explanation Lou. Although I am sure those Dynafit engineers could create a spring loaded pin which could be engaged when you flip the first heel riser down. The riser could push the pin into a hole on the base plate to stop rotation and pop up when you flipped the risers back up. Might be a good thing anyway as I had 5 rotations from low riser to locked in on a tour yesterday in Coquihalla pass. This has never happened before and the snow was funky refrozen crud, so it was probably the conditions, but it would be nice if it couldn’t happen at all.

  142. Lou Dawson January 27th, 2014 2:00 pm

    Larry, good thinking, indeed that could probably be done!

  143. Karol January 30th, 2014 8:33 am

    I bought the TLT Speed Radical bindings last year and, after one year of moderate use I need to say that the plastic notches to prevent the auto-rotation don’t really work in my case. It seems that they wore out and the heel piece keeps popping into downhill mode every now and then.
    I was told by local shop (Spain) that some time ago they got a whole new set of heelpieces to replace, but frankly speaking he was not able to tell me due to what particular issue (and I didn’t find any recall notices on the web).
    So, I am so far left with the rotating heel piece which annoys me a lot!
    Otherwise, a great binding one can use for touring and competitions – a good allrounder – I even use it on piste.

  144. Steve February 11th, 2014 12:47 pm

    Conflicting information exists on the backcountry.com site for this binding regarding whether you can change from ski to tour mode without stepping out of the toe piece. Since these bindings don’t have brakes, can’t you just unweight your heel and rotate the heel post by hand using the Van Halen method or some such? http://www.youtube.com/watch?v=gqBaHPcgtAM

    Here is Lou’s advice from Feb 2010:
    1. You can’t be using ski brakes.
    2. Lock toe latch.
    3. Either pull boot and ski up off the snow towards your butt, or pull up on your boot heel as the ski is resting on the snow.
    4. Rotate binding heel unit until your boot heel pops up and out.
    Applying a certain amount of upward force on the boot or downward force on the ski is the key. You can rotate the binding by just using your ski pole tip as usual, or with the ski up near your butt, it sometimes works well to insert your pole grip between boot heel and binding heel lift, and rotate the heel by moving the pole grip.

    Is there a definitive answer?

  145. Lou Dawson February 11th, 2014 12:52 pm

    Steve, yes, but it’s an acquired skill and not as easy since the Speed has no permanent rigid upright heel post you can lever a ski pole grip against. With mine, I’ve found it’s too awkward to bother with, though again, it can be done. I’d say if this is important to you, look at other binding models that have definite on-the-fly mode change systems. Onyx, Vipec for example, and ION once it comes available. Lou

  146. Bob April 16th, 2014 10:13 pm

    Hey Lou – I have a pair of speed radicals, which I mounted as shown above with the ST toe plate as a shim. I have noticed that some combination of the shim and perhaps my particular boot (Vulcan) and shell size (27.5/304mm) is causing the boot sole to hit the cramp on attachment when I attempt to tour flat. I removed the attachment, but it is still hitting the center part of the attachment that is part of the toe piece – so much that if I let the boot drop in flat tour mode, it rests a few mills above the base plate at the heel. An issue to note for those shimming speed toes in this way; have you seen this? The obvious solution seems to me to be to take a razor blade to the boot sole at the point where it meets the cramp-on attachment… does this make sense or is there another clever work around here? Thanks.

  147. Lou Dawson April 17th, 2014 6:45 am

    Hi Bob, sure, ever since people have played around with shims on tech bindings, starting with the support shims for Scarpa F1 boots, this has been something that can happen. The effect varies depending on what model binding, how much toe shim, shape of boot sole lugs, rocker, length of boot, etc. Three solutions:

    1. Accept a small amount of bending of the boot when you’re in flat-on-ski mode. Works if you don’t ski flat very much.

    2. Trim lugs on boot sole. Probably should be done no matter what.

    3. Add a shim-block under boot heel. Best if you do a lot of flat skiing.

    Solution can be a combination of above, or probably best to install a heel shim-block if you’re doing a lot of flat-on-ski walking, since with your fairly thick toe shim you might be _too_ flat on the ski (heel dropped too low).

    It seems that most people shimming tech binding toes are either using thinner shims, or binding toe models with less stuff under the boot sole, or they just don’t ski without heel lifts very much, so this isn’t a big pervasive problem.

    If you never use ski crampons, you could remove the tang sticking up from the binding. If you do, with regards to strength of the binding toe base leave a bit of the tang intact, don’t grind totally flat.

    Another thought is do you really need a 6 mm shim? I’d agree that using the FT/ST toe plate does result in a nice binding delta/ramp for modern skiing, but it’s most certainly optional to go with that much stack. I’ve found about 3 mm toe shimming is what I prefer with the Speed Radical.



  148. Bob April 19th, 2014 5:53 pm

    Lou – thanks for the response, make sense. Touring flat still works, my primary concern was that it would possibly place upward leverage on the toe piece, which doesn’t seem like it would be good over time. The sole may be soft enough to bend in a bit, without doing this but tough to tell. Fair point on the shim height – I mainly used the ST plate b/c it fits nicely AND you can then use actual Dynafit ST screws instead of grinding up a make shift screw. It also reduces the delta close the Beast, which seemed like a reasonable delta to operate with.

  149. Lou Dawson April 19th, 2014 7:24 pm

    The result is indeed a nice delta! I’d just trim some sole material first and see how it goes. He heel block is easy to install. Lou

  150. phil August 5th, 2014 1:48 pm

    hi does the listed weight include the leashes? is it easy enough to adapt the leashed to include a breakaway?

  151. Chris November 8th, 2014 11:21 am

    I can use my old verticals with 2 different boots at close to the limit of their BSL adjustment range… now purchasing some new dynafits and wondering:

    Can anyone confirm whether the Radical FT/ST with brakes vs Radical Speeds vs Speed Turns all have the same heel adjustment range? Or does one heel have more range over others? Are they more/less/the same compared to Verticals? I’ve read different things and shop guys just gave me another opinion…


  152. Lou Dawson 2 November 8th, 2014 11:50 am

    Well, I went out to the shop and compared Vertical and Radical ST/FT, the Radical has about 2 mm less range to the rear and about 1 mm less to the front, that’s in a direct comparo sandwiching one binding with the other, bottom to bottom, screw holes lined up.

    Speed Radical goes backward to the same position as Radical FT/ST (in relation to mount screw holes), but goes about 2 mm less forward.

    99.9 that Speed Turn has same base as Speed Rad.


  153. Chris November 8th, 2014 11:53 am

    Thanks Lou!

  154. Lou Dawson 2 November 8th, 2014 12:02 pm

    Too bad a retail shop couldn’t have done this for you, good example of the problem with retail… Lou

  155. Mark Worley November 23rd, 2014 11:52 am

    Toe plates are available, and 19 mm screws are the ones needed.

  156. Chris December 16th, 2014 2:34 pm

    Hey Lou,

    I just broke my second Speed Radical heel piece on a year-old pair (no anti rotation pin version). In both cases the mini torx screws sheared and the heel piece exploded. I’ve been skiing various iterations of Dynafits 80-100 days a year for 10 years with no issues, and I’m generally not hard on my gear. Have you heard of many breakage issues? Does it seem more common with Radicals than other iterations?

    Dynafit has been good about replacing them but I’m losing a bit of faith in them. Have you ever considered disassembling the heel piece, epoxying the pieces together to reduce the force on the under-sized screws?

    Any other thoughts?


  157. Lou Dawson 2 December 16th, 2014 4:32 pm

    Hi Chris, we run a lot of bindings and I’ve not had that happen yet. But I’m sure it’s possible and am sorry to hear it happened to you. My advice would be if it happened twice you should switch to a different binding. What I’d suspect is happening is that it’s the climbing phase and leverage of the heel lifters that’s perhaps fatiguing the screws.

    Interesting idea about the epoxy. I suppose when you received new bindings you could take them apart, clean mating surfaces with solvent, and glue together with high-quality epoxy along with screwing. No way to know if that would really help but it sounds burly.

    ‘best, Lou

  158. Chris December 16th, 2014 6:52 pm


    Thanks for the thoughts. I hadn’t thought about the climbing/leverage from heel lifters fatiguing the screws but that totally makes sense. The design hasn’t changed much, but the Radical heel lifters definitely put a different type of stress on the mini screws.

    Maybe time to get some Speed Turns and mate them with the Radical toe pieces!



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