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Q Factor XTR 2x10, 3x10 and XT 3x10

6K views 9 replies 8 participants last post by  Procter 
#1 ·
My new frame requires Q factor of at least 165mm.

I am particularly interested in the 2x10 but was reading that the Q factor was 3mm less on each side. But am not sure what it was in the beginning.

Anyone know the Q factors for the 2011 series?

Thanks!
 
#2 ·
I couldn't track down these figures either. What I was able to find is that the Q factor of the "race" is 3mm less then the "trail". Just like what you said, except the Q factor of the 2X10 trail (38/26) is wider then the 2X10 "race". Not sure that this helps you, but figured I would throw it out there.
 
#10 ·
Technically speaking yes the q factor is a measure of the distance between the outside of the cranks, but, smaller q factor must also mean smaller inner width . . . you can't achieve smaller q by just shaving off the outer edge of the cranks, the crank arm is carefully designed for the maximum stiffness with minimal material, it needs to be a certain thickness, therefore narrowing the inner width to achieve it.
 
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