Comments on: K2 Coomback Backcountry Ski Review http://www.wildsnow.com/2031/coomback-k2-ski-review/ Backcountry Skiing Weblog Blog, FAQs, more, links and info about randonnee, telemark and backcountry ski mountaineering. Thu, 09 Feb 2012 05:43:15 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: leo http://www.wildsnow.com/2031/coomback-k2-ski-review/comment-page-3/#comment-42262 leo Sat, 21 Jan 2012 16:24:16 +0000 http://www.wildsnow.com/?p=2031#comment-42262 Hi Lou, Did the 2011-12 model changed much from the 2010-11 model? Hi Lou,

Did the 2011-12 model changed much from the 2010-11 model?

]]> By: mt http://www.wildsnow.com/2031/coomback-k2-ski-review/comment-page-3/#comment-40766 mt Mon, 05 Dec 2011 00:35:30 +0000 http://www.wildsnow.com/?p=2031#comment-40766 dmr, I think you are correct. Although it depends on what type of Clydesdale you are, at 2 m tall and 100 kg heavy, I have an inseam of 38 inches and a wingspan of 7 feet. All the limb length adds a lot of leverage ( longer moment arms), making it easier stress the mount. Additionally I use a lot of angulation, which adds to the problem. In my brief 43 years of mounting boards, I've always gone the heli-coil route simply because it seemed like cheap insurance and a better alternative to ripping the mount out, and then hoping the ski manufacturer can see it's way to replacing the ski. One thing I will note is that while mounting a NTN binding to a pair of Line skis, it does appear that as skis morph into snowboards their vertical profile appears to shrinking, leaving less bearing surface for the screws, which would increase the chance of ripping out the binding mount. One might be served by using a higher thread count per inch of screw. FWIIW, I'm a M.E. P.E. with 30 years of professional experience in addition to a PhD in destroying recreational equipment of all types. Damn Clydedales! Ciao Bene mt dmr,

I think you are correct. Although it depends on what type of Clydesdale you are, at 2 m tall and 100 kg heavy, I have an inseam of 38 inches and a wingspan of 7 feet. All the limb length adds a lot of leverage ( longer moment arms), making it easier stress the mount. Additionally I use a lot of angulation, which adds to the problem.

In my brief 43 years of mounting boards, I’ve always gone the heli-coil route simply because it seemed like cheap insurance and a better alternative to ripping the mount out, and then hoping the ski manufacturer can see it’s way to replacing the ski.

One thing I will note is that while mounting a NTN binding to a pair of Line skis, it does appear that as skis morph into snowboards their vertical profile appears to shrinking, leaving less bearing surface for the screws, which would increase the chance of ripping out the binding mount. One might be served by using a higher thread count per inch of screw.

FWIIW, I’m a M.E. P.E. with 30 years of professional experience in addition to a PhD in destroying recreational equipment of all types.

Damn Clydedales!

Ciao Bene

mt

]]> By: dmr http://www.wildsnow.com/2031/coomback-k2-ski-review/comment-page-3/#comment-40759 dmr Sun, 04 Dec 2011 14:57:20 +0000 http://www.wildsnow.com/?p=2031#comment-40759 P.S. I've never had hard goods fail, so never had to deal with a brand claiming that failure was not their fault. However, I have had good luck with clothing and backpack manufacturers replacing zippers, repairing seams, and reinforcing cordura in the lower pant legs of ski pants. P.S. I’ve never had hard goods fail, so never had to deal with a brand claiming that failure was not their fault. However, I have had good luck with clothing and backpack manufacturers replacing zippers, repairing seams, and reinforcing cordura in the lower pant legs of ski pants.

]]> By: dmr http://www.wildsnow.com/2031/coomback-k2-ski-review/comment-page-3/#comment-40758 dmr Sun, 04 Dec 2011 14:54:39 +0000 http://www.wildsnow.com/?p=2031#comment-40758 I have neither the technical measuring tools nor the equipment testing experience (not even a workbench) of Lou, but I do have a question, could the wider skis + Clydesdale-ness of some be a potential cause of ripping the bindings out of skis? From what I've read and heard, the front piece of the Dynafit was not designed for such a wide ski, so the levering + heavy individual might be the cause (I'm sure that y'all have thought of that). My understanding is that the FT Z12 binding series is supposed to take care of that (as well as tighter springs on some front piece models). 15 years ago I ripped a Marker MRR toe piece out of a Dynamic slalom ski. Had the remount done with heli-coils (sp?) and never had a problem after. Should the Clydesdales among us who choose a wide ski + Dynafit binding setup go the heli-coil route? Just a suggestion / question (I'm not a materials nor physics expert, I'm not a doctor and I don't play one on TV). Cheers. I have neither the technical measuring tools nor the equipment testing experience (not even a workbench) of Lou, but I do have a question, could the wider skis + Clydesdale-ness of some be a potential cause of ripping the bindings out of skis?

From what I’ve read and heard, the front piece of the Dynafit was not designed for such a wide ski, so the levering + heavy individual might be the cause (I’m sure that y’all have thought of that). My understanding is that the FT Z12 binding series is supposed to take care of that (as well as tighter springs on some front piece models).

15 years ago I ripped a Marker MRR toe piece out of a Dynamic slalom ski. Had the remount done with heli-coils (sp?) and never had a problem after.

Should the Clydesdales among us who choose a wide ski + Dynafit binding setup go the heli-coil route?

Just a suggestion / question (I’m not a materials nor physics expert, I’m not a doctor and I don’t play one on TV).

Cheers.

]]> By: mt http://www.wildsnow.com/2031/coomback-k2-ski-review/comment-page-3/#comment-40756 mt Sun, 04 Dec 2011 01:37:39 +0000 http://www.wildsnow.com/?p=2031#comment-40756 Mike, I wish I had a dollar for every time a manufacturer told me that a failure of their product was rare, with Black Diamond leading the pack. If such a failure was rare, then why are all these posts about failure. My experience is that there is a lot of equipment that works for the smaller skier, that once strapped on a Clydesdale such a myself, fail. My only response is that Clydesdale need to ski carefully while carving. Happy Winter, mt Mike,

I wish I had a dollar for every time a manufacturer told me that a failure of their product was rare, with Black Diamond leading the pack. If such a failure was rare, then why are all these posts about failure.

My experience is that there is a lot of equipment that works for the smaller skier, that once strapped on a Clydesdale such a myself, fail. My only response is that Clydesdale need to ski carefully while carving.

Happy Winter,

mt

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