Subject: Re: crank arm shape Posted by: Jim on December 07, 2000 at 10:34:46: In Reply to: crank arm shape posted by Kiwi on December 07, 2000 at 02:54:34:

Message: >I've noticed that the Ultegra crank arms on my race bike >are curved, and those on my old ride-to-work Campag equipped bike are straight. The dimension between the >ends of the Ultegra cranks is 10mm greater than the Campag >ones, for an identical BB width. Is one design superior >to the other? Or is this more an appearance issue? Is there any penalty in pedalling efficiency? Cheers!.................................................................>>>....Distance between ends of crank arms is refered to as Q factor.Lower number is generally considered more desirable. some people are more sensitive to it than others. Are you running the specified BB spindle length for each crank or just whatever was in the parts box?