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Groupset compatibility?

Old 12-10-15, 11:17 PM
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Erzulis Boat
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Groupset compatibility?

Can I use my XTR M951 groupset that was on my 26, and put it on a 29 without gearing issues?
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Old 12-10-15, 11:50 PM
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Originally Posted by Erzulis Boat View Post
Can I use my XTR M951 groupset that was on my 26, and put it on a 29 without gearing issues?
Sure at least for some of it. Front derailleur may not fit the new seat tube. Does the 29er have a threaded bottom bracket? Not sure if there is a way to use that style of crank on one of the press fit bottom bracket standards.
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Old 12-10-15, 11:56 PM
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Originally Posted by Canker View Post
Sure at least for some of it. Front derailleur may not fit the new seat tube. Does the 29er have a threaded bottom bracket? Not sure if there is a way to use that style of crank on one of the press fit bottom bracket standards.
Yikes, didn't even think of the BB issues. Just been riding my trusty 26 stuff forever, and thought a 29 would be cool.

I should just start from scratch, and do it right. Thanks!
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Old 12-11-15, 12:05 AM
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Originally Posted by Erzulis Boat View Post
Can I use my XTR M951 groupset that was on my 26, and put it on a 29 without gearing issues?
Highly unlikely, M951 was 8 speed pre disc, 29er by default are disc only (don't think I have seen a non-disc one, at least of a spec that you would consider putting XTR on) and saying you have a groupset indicates hubs, v-brakes, STI's etc.

For the gearing, the M951 offered upto 11-32, for a 29er, your be wanting at least a 34t, preferably a 36t or larger on the back.

If the M951 is in good condition, would look at selling, and replacing with Shimano M8000 or SRAM in either 1 or 2 x 11 speed.
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Old 12-11-15, 12:48 AM
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Originally Posted by jimc101 View Post
Highly unlikely, M951 was 8 speed pre disc, 29er by default are disc only (don't think I have seen a non-disc one, at least of a spec that you would consider putting XTR on) and saying you have a groupset indicates hubs, v-brakes, STI's etc.

For the gearing, the M951 offered upto 11-32, for a 29er, your be wanting at least a 34t, preferably a 36t or larger on the back.

If the M951 is in good condition, would look at selling, and replacing with Shimano M8000 or SRAM in either 1 or 2 x 11 speed.
Thanks. I have new XTR discs with this setup, I just swear by the old 951 cranks and F/R derailleurs. (Its 9 speed, so maybe it's the set right after 951?)

ETA- Yep, its the 952, the dull gray XTR with Hollowtech cranks etc. Will keep it on my 26. I kinda hoard M952

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Old 12-11-15, 03:54 PM
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Originally Posted by jimc101 View Post
...29er by default are disc only (don't think I have seen a non-disc one, at least of a spec that you would consider putting XTR on) and saying you have a groupset indicates hubs, v-brakes...
Purely for the conversation's sake, there were some pretty high-end builders that made v-brake 29er frames. I just saw an really nice steel Independent on the local FB bike swap group page.
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Old 12-11-15, 04:03 PM
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Originally Posted by redtires View Post
Purely for the conversation's sake, there were some pretty high-end builders that made v-brake 29er frames. I just saw an really nice steel Independent on the local FB bike swap group page.
Google searched, and found one from 2001 with Magura rim brakes (looks real nice as well); really, there should never have been any, as soon as discs were standardized, they should have been the only option, but as always too may competing standards in cycling, and old/obsolete ones taking too long to stop being fitted.
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Old 12-11-15, 04:34 PM
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The Karate Monkey (not high end but definitely worth building) came with v-brake studs until 2011 and the Surly Ogre still has v-brake studs. Neither are high end but both are worth building up, even with XTR.

As for whether there were rim brake 29rs or not, the first Gary Fisher 29rs were rim brake bikes. Even their first suspension 29r (the Sugar 292) came with rim brakes until 05 so.
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Old 12-12-15, 05:40 PM
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I think one other, more significant, problem would be trying to find quality rim brake rims that aren't just "over-built road rims".
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