Dynafit Beast Boot Heel Fitting Install and Opinion — Beast Week Pt. 5

Post by WildSnow.com blogger | August 30, 2013      

During testing I’ve ended up installing Beast boot-heel fittings about a dozen times. Doing so is a 2 on the WildSnow 10-wrench difficulty scale. But still, you don’t want to muck up your nice shiny beef boots. So head on over to our FAQ for a brief Beast boot fittings install tutorial.

The beefed up “Beast” boot heel fittings are actually my favorite part of the beastly system. A weak point with all tech bindings isn’t the bindings, but the minimal boot fittings that have remained virtually unchanged for several decades — especially the rear fitting, which in most boot models it is held essentially with one small screw.

Beauty of the Beast tech fitting is it could possibly work with any tech binding if you set things up correctly. Mainly, I’d run at a tight 6 mm or perhaps 5.5 mm tech gap, and file some steel from the corners of the Beast fitting to make sure it can’t jam up a lateral release if the ski is de-cambered (reverse arched), thus closing up the tech gap. Once the retail fittings come out, we’ll evaluate further and publish more photos. For now, keep the possibilities in mind with our teaser image below — and of course all mods are at your own risk. (Hint to aftermarket: make a similar fitting only with the corners rounded.)

You can install Beast heel fitting on most boots with tech fittings.

You can install Beast heel fitting on most boots with tech fittings. Doing so is mandatory for Beast 16 binding, but could it be good for other tech bindings?

Oh, and with the “facts” over on the FAQ, some opinion from your’s truly? The question, can you use the Beast 16 boot fittings with other tech bindings, for increased reliability?

Official word from Dynafit is “we recommend switching heel inserts for proper release and spacing, with Beast 16 fitting only used for Beast.”

To be fair, I didn’t expect anything else from Dynafit, as it’s difficult enough to sell ski bindings that conform to few if any international standards, let alone approving user modifications that could get you in immersed in hot water. But over here at WildSnow.com we’re known as modders — and in this case I think a mod could be worthwhile. In theory, below is how you’d do it.

When using Beast fitting with other tech bindings, lateral release  could bind here so we feel a small  mod would be necessary, basically removing some material as indicated by the red line to make the fitting conform to the arc of the boot heel

If using Beast boot heel fitting with other tech bindings, lateral release could bind as indicated by red arrow. We feel a small mod would be perhaps be necessary, basically removing some material as indicated by the red line to make the fitting conform to the arc of the boot heel (BEAR IN MIND SUCH A MOD WOULD NOT WORK WITH BEAST BINDING). All said, we feel strongly that the Beast tech boot heel-fitting or something similar might be a terrific 'in line' improvement for boots used by hard charging skiers on regular tech bindings -- provided it is correctly installed, modified, and the binding is adjusted and tested.

Also see our tutorial on re-installing existing tech fittings to increase reliability.

Oh, and through bolting for the ultimate in tech fitting strength. This is a good option if you’re not comfortable with swapping to Beast fittings.


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39 Responses to “Dynafit Beast Boot Heel Fitting Install and Opinion — Beast Week Pt. 5”

  1. Bob August 31st, 2013 10:13 am

    It looks like the shape of the Beast heel insert may play an important role in the return to center action. Do you think grinding off the sides will change this?

  2. lou August 31st, 2013 11:21 am

    Bob, I’M ONLY CONJECTURING USING THE BEAST HEEL FITTING FOR OTHER TECH BINDINGS, ONE WOULD NOT MESS WITH IT IF USING BEAST BINDING. And if modded, it would not be acceptable for Beast. I’ll make that more clear in the writing. Ultimatly, I’d like to see an OEM improved heel fitting on all tech boots. Lou

  3. Nick September 1st, 2013 11:51 pm

    My beef AT boots have swappable sole blocks (Tecnica Cochise) I think these two new screws would go right into the slot that soles slide into. I guess it won’t matter too much as there is plenty of runner left, but it will be something I’ll be taking a closer look at before I start drilling holes in my boots. Maybe Tecnica will release some sole blocks with Beast fittings pre-attached.

  4. Lou Dawson September 2nd, 2013 9:08 am

    Nick, if your fittings come off (not molded in), chances are the Beast fittings will work. But with swap blocks there is the issue of how the side screws interact with both the blocks and the shell behind the blocks. I have some Cochise, I’ll test and report. Lou

  5. Pete September 3rd, 2013 10:52 am


    Do you think, as the new diamir zenith seems to have no side release at the rear the Beast fitting should work perfect for this binding!? Please correct me if I´m wrong 😉
    And besides that PLEASE provide us as much information as possible about the new Zenith. If this binding works it could be my christmas/January gift.

    I also have to admit I´m reading your blog daily and you´re doing a very good job!!!


  6. Lou Dawson September 3rd, 2013 12:04 pm

    Hey Pete, thanks for visiting. I’m working something out for Zenith coverage, but they don’t have much for the public eye as of yet. For folks that need a beefy tech binding I’m thinking Beast might easily fit the bill, so don’t overlook it.

    Also, don’t forget with have around 2,000 blog posts along with about 200 static pages, most of which are chock full of relevant content. You can browse those by using the link in the nav menu at upper left, or use the search box, or just step forwards or backwards by using the nav menu at the bottom of all posts.


  7. Odd André November 16th, 2013 10:43 am


    This is a very interesting blog with a lot of useful topics and information, kudos!

    I have a question about this heel fitting bar. Does it “make the boot longer”? Does it build more backwards than the original metal piece on most boots, measured both over and on the inside of where the pins go on the boots?


  8. Lou Dawson November 16th, 2013 1:20 pm

    Odd, it does make the boot longer, but since Beast binding is designed to run with no heel gap, it’s a wash. Know that once the ‘bar’ is on the boot, the boot only works with Beast binding. Lou

  9. John November 16th, 2013 1:51 pm

    Hey Lou, I thought I’d read elsewhere that the new heel fitting would work as long as the heelpiece got backed off a little bit to maintain the heel gap. Doesn’t really matter for me since I’m sticking with my Verticals but maybe someone else is dying to know for sure.

  10. Lou November 16th, 2013 10:53 pm

    John, Dynafit says no, and in reality sure you can try and tune the heel distance so the boot will release. Does that mean it “works?” In my vocabulary, thats getting a bit too iffy with an adult ski binding to say it “works.” The problem is that when the boot releases sideways at the conventional tech binding heel, it can bind on the Beast boot heel unit. You can perhaps back the heel unit off to where this doesn’t happen, but then, how do you know what RV value you’ve got? You could also file the corners off the boot heel fitting so they had better clearance. That would “work” as well.

  11. Maverick November 25th, 2013 11:19 am

    Kind of a real bummer, but I went to the Black Diamond Equipment store in Salt Lake and they basically said “no” when I wanted to buy the Beasts the other day. Their rationale was that my boot, a two-year-old pair of BD Factors would not accomodate the new heel plates that came with the Beasts without modification beyond their threshold of comfort for “sketchiness/incompatibility”. They said that after experimentation, my best bet would be to buy a different set of boots if I wanted the shiny, new green bindings….My $1000 purchase just got more expensive. Uh oh.

    Lou, are you in agreement with BD?

  12. Grant January 1st, 2016 1:05 pm

    Hey Lou – I’ve had the Beast 16 on my Armada Magic J’s that I use for ski hill powder days, slackcountry and occasional sled laps. I just setup a pair of alpine skis with Rossi FKS bindings. Unfortunately I’m finding that the boot (K2 Pinnacle 130) won’t properly step into the Rossi with the Beast horseshoe. Do you still feel like any kind of horseshoe mod is a no-no? If I can’t mod it, I’ll probably sell the Beast and look at something like the CAST system, or investigate how well Radical 2.0 will handle ski hill shredding… (I’ll ask that on the Radical 2.0 thread.) Thanks!

  13. Flavius August 29th, 2016 7:00 am

    I have bought a pair of Beasts, intending to use them with my Dalbello Sherpa. However, I noticed that the Power Insert is higher than the upper surface of the heel. Would that be a problem?
    Thank you

  14. Lou Dawson 2 August 29th, 2016 7:14 am

    Grant, as we’ve said here many times, there is no tech binding that equals a good quality alpine binding in performance for downhill skiing. Shredding the hill on tech bindings can be done, but we do not recommend it.

    Flavius, I doubt that’s a problem. Easy to test on workbench.


  15. Geewilligers August 29th, 2016 8:35 am


    Thanks for reviving this thread – I have traded some emails with US Dynafit customer service regarding the Beast Horseshoe and its compatibility with non-beast Dynafit bindings. I was specifically asking about compatibility with the other kiss-gap design setups (e.g. Radical 2.0). The rep maintained that the beast horseshoe is compatible with all Dynafit bindings.

    Does this jive with your understanding?

    Many thanks,


  16. Lou Dawson 2 August 29th, 2016 2:59 pm

    Raff, yes that jibes. Very easy to test. Lou

  17. Jan October 12th, 2016 5:04 am

    Hi Lou,
    Thank you for excellent blog.

    Please excuse my question might be answered already.

    On one skis I have G3 ION binding. On the second ones Dynafit Beast 14. Heel piece mounted.

    Will it work both? Can I use both bindings with the same shoes?

    Thank you,

  18. Lou Dawson 2 October 12th, 2016 6:15 am

    Probably. Adjust both correctly, test on workbench. Easy to evaluate. Lou

  19. Kyle McQueen November 14th, 2016 1:27 pm

    Where do i buy these heel fittings!?

  20. Nekaj November 22nd, 2016 4:08 pm


    What about combination of using “beast modifiet” boots with Marker Kingpin? Is that safe?


  21. Lou Dawson 2 November 23rd, 2016 6:41 am

    Nekaj, I don’t think it would be a good idea, but would be easy to evaluate on the workbench. Can’t say for certain since boot shape is not always the same. Lou

  22. William Häni February 22nd, 2017 9:15 am


    I have a pair of dynafit beast 16. I want to combine them with a pair of la sportiva spectre 2.0 boots. The thing is that the trab tr2 inserts on my boots make the set up of the power inserts impossible. Do you have a solution about it or are those boots incompatible with the beast 16?

  23. Lou Dawson 2 February 22nd, 2017 9:24 am

    Sounds like they are incompatible, or perhaps grind off the TR2 metal tabs so the Beast part will fit. I’d suggest the proper boots… Lou

  24. kevin April 2nd, 2017 10:33 pm

    hi there lou, if a boot comes already installed with a beast horseshoe heel insert, can this just be removed with the boot heel usable as is with a kingpin binding?

  25. Lou Dawson 2 April 3rd, 2017 8:08 am

    Kevin, probably. Easy to test. Some boots don’t work with Kingpin and do require another type of adapter. Lou

  26. Kevin April 3rd, 2017 5:03 pm

    thanks again Lou : )

  27. Sedgesprite April 25th, 2017 3:19 pm

    Is there a final word on Beast boot insert compatibility with dynafit radicals.

  28. Geewilligers April 25th, 2017 3:31 pm

    @Sedgesprite – Used them all season with no issue – who is to say what that means…

  29. Lou Dawson 2 April 25th, 2017 3:44 pm

    Sedge, I think I’ve mentioned before, we don’t see any issues, all you have to do is bench test both lateral and vertical release to be sure. Lou

  30. Miro October 31st, 2017 5:01 am

    Hi Lou, I would like to ask : Is it possible, and is it safety to use Beast 16 bindings without the power insert on the boot?

  31. Lou Dawson 2 October 31st, 2017 11:15 am

    It is possible but I would not recommend, if nothing else you can damage the boot. Lou

  32. Georg November 25th, 2017 3:22 pm

    Hi, Lou!

    I’m wondering if there have been tests with the kingpin heel adapter for use in beast and other tech bindings? I’ve bench-tested the beast heel adapter in the kingpins, but I did not find it satisfactory.

    I have different tech-bindings on all of my skis (including the kingpin) but only have one pair of boots (the Vulcans) and it have worked without problems. But this year I bought an additional pair of skis with the Beast bindings and now I’m trying to figure how to continue using just the one pair of boots. I can’t find any solid information anywhere else. Thanks!

  33. Lou Dawson 2 November 25th, 2017 6:45 pm

    Hi Georg, I don’t know of any comprehensive tests, sorry about that. Each case is different, best to just do your own tests. Lou

  34. Max April 14th, 2018 11:36 am

    I am very happy with my Dynafit Beast Carbon boots but after testing on a Wintersteiger machine discovered they do not side release properly in a Kingpin due to the shortened heel. Does anyone know if the Marker Kingpin heel adapter for Dynafit TLT also fits the Beast boots?

  35. Lou Dawson 2 April 14th, 2018 11:44 am

    Hi Max, I’m 99% sure the adapter would fit, perhaps with very slight bending. Not sure it would make any difference, but worth a try. Good on you for actually testing! Many people ski bindings, any brand, alpine or touring, that actually don’t release well, and they proceed in totally ignorant bliss until that legendary pop or crack occurs and an orthopedic surgeon’s mortgage gets paid down. Let us know how the boots test out once you get the adapter on. Lou

  36. Max April 14th, 2018 12:25 pm

    I will fit them and report back. When mounting them on the heel do they simply slip over the tech insert or should that first be removed?

  37. Lou Dawson 2 April 14th, 2018 12:27 pm

    It’s pretty obvious when you mount them, you remove the existing tech insert. Lou

  38. Max April 14th, 2018 5:33 pm

    Lou, my Dynafit Beast Carbon has a masterstep heel insert. Do you know if the Marker heel adapter is compatible with masterstep? Thanks, Max

  39. Lou 2 April 15th, 2018 7:26 am

    Hi Max, as far as I know, the answer is no. Lou

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