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 Post subject: xtr m951 bb problem
PostPosted: Wed Oct 30, 2013 10:49 am 
Retro Guru

Joined: Thu Aug 04, 2011 12:38 pm
Posts: 341
Location: antwerp, belgium
i bought a nos m952 cranckset in dh (single ring) version
i also bought (here) a m 951 bb to go with it

problem is that these 2 doesn't seem to fit. the "tooth" on the bb seem to big for the crancks.

did i buy the wrong bb, or do i need to use some amount of force to pull them on using the cranck bolts?


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 Post subject: Re: xtr m951 bb problem
PostPosted: Wed Oct 30, 2013 2:28 pm 
Gold Trader
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Joined: Fri Jan 23, 2009 2:30 pm
Posts: 12398
Location: Surrey
I had a similar issue using m950 arms and an m952 bb. An m950 bb worked fine though.I was a bit timid when applying force, and learned later that if you remove the self extracting collars from the arms, it makes fitting easier, though in the case above it still didn't fit.


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 Post subject: Re: xtr m951 bb problem
PostPosted: Thu Oct 31, 2013 1:00 am 
Retro Guru

Joined: Tue Oct 23, 2012 10:52 am
Posts: 348
Location: Whelmington on Sea
There has never been a XTR M951 bb, they were either M950 or M952, the only octalink bb numbered 51 was the XT ES51, this a V2 octalink & it won't fit the XTR cranks.


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 Post subject: Re: xtr m951 bb problem
PostPosted: Thu Oct 31, 2013 10:55 pm 
Retrobike Sponsor
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Joined: Sat May 22, 2010 10:33 pm
Posts: 2192
Location: Suffolk
The above is so true. Modern BB option are the 7700 and 5500 109mm BB's.


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 Post subject: Re: xtr m951 bb problem
PostPosted: Thu Oct 31, 2013 11:01 pm 
retrobike rider
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Joined: Fri Aug 08, 2008 2:36 pm
Posts: 16737
Location: Yorkshire, England
I assumed it was a error and a M951 crank onto an M952 BB.
Just tighten it up carefully.


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