Originally Posted by
bellweatherman
How would I go about knowing what axle length to use? Does axle length correspond to rear dropout spacing? For example, a frame that has rear spacing of 130mm, would use 130mm long axles?
Yes, axle length is based on the over locknut frame width. However the axle has t extend 5mm or so beyond the locknut face, to support the dropout. So for a 130mm frame, you'd want a QR axle 140-141mm long.