I've recently read some info on Q-factor so was checking my bike with campy record cranks and campy record bottom bracket and noticed that the left crank is 2mm closer to the chainstay than the right crank. Is that within tolerances? Am I expecting too much for this distance to be equal? What typically causes this? The cranks are both torqued within specs.
Are there any consequences I should be aware about that could stem from this?
I've recently read some info on Q-factor so was checking my bike with campy record cranks and campy record bottom bracket and noticed that the left crank is 2mm closer to the chainstay than the right crank. Is that within tolerances? Am I expecting too much for this distance to be equal? What typically causes this? The cranks are both torqued within specs.
Are there any consequences I should be aware about that could stem from this?
A couple of things:
Uneven chainstay clearance isn't necessarily an indicator of crank asymmetry - it could be that the chainstays are asymmetric. Better to use the seat tube as a reference.
I don't know whether 2mm of asymmetry is unusual for Record cranks (you don't mention whether you're talking about the current model or an older incarnation of Record), but many cranks have far more asymmetry than 2mm, even when used with their recommended bottom brackets. People assume that their cranks are symmetrical without having measured. Would you have noticed?
The worst consequence you should expect is that you will end up sitting 1mm further to the right to compensate. If it the thought bothers you, you could move your cleats 1mm each - but I recommend you forget about it and enjoy your bike.
