Need Q factors of Shimano, Sram and Campagnolo cranksets

[zmalwo]

Does anyone know the Q factors for all three manufactures? Thanks.

[jambee]

There was a recent article in BQ that listed the Q factor of most cranks.

From memory:
Campagnolo 144mm
Shimano: 150mm
SRAM is listed here: https://www.servicearchive.sram.com/...019_road_0.pdf

[BdaGhisallo]

I think the higher end Shimano cranks are 147.5mm.

[wallymann]

Originally Posted by zmalwo

Does anyone know the Q factors for all three manufactures? Thanks.

modern campag UT are 145.5mm

[Mark McM]

I just put calipers to some Campagnolo and SRAM cranks I have:

Campagnolo Record & Athena (Ultra-Torque): Q-factor = 145.5mm, U-factor = 128mm

SRAM Red 22 & Force 22 (GXP): Q-factor=145mm*, U-factor = 138mm


*To the pedal mounting faces. The pedal mounting faces on SRAM carbon cranks are inset 1.5mm into the outer face of the crankarm, so the width between outer crankarm faces is actually 148mm.