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As older XTR seem to be de riguer for SSing, I thought I might pick myself up a pair, were I to find them cheap...my question is, although they appear nearing identical, how did the cranks evolve from 950 to 951 to 952. Are the 952s much different/better/more desirable than the 950s?
 

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a nice cake said:
As older XTR seem to be de riguer for SSing, I thought I might pick myself up a pair, were I to find them cheap...my question is, although they appear nearing identical, how did the cranks evolve from 950 to 951 to 952. Are the 952s much different/better/more desirable than the 950s?
Good question. Without having my handy reference binders, the main differences are in the chainrings. M950 was 8-speed evolving to the M952 9-speed compatible rings. Arms are probably virtually unchanged.
 

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a nice cake said:
As older XTR seem to be de riguer for SSing, I thought I might pick myself up a pair, were I to find them cheap...my question is, although they appear nearing identical, how did the cranks evolve from 950 to 951 to 952. Are the 952s much different/better/more desirable than the 950s?
Fuctionally, Mike is correct. The M950 and M951 were eight speed and M952 had nine speed rings. The M950 arms have a slightly different shape (wider) than the later models but the M951 and M952 arms are identical. The design change is minor but the M951 and M952 are probably a bit stronger/stiffer.
 
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