Originally Posted by
LupinIII
going to have to say the crank arms and steel frame are going to be flexing much more than the crank axle, whether it's square taper or gxp.
All the force from your crank arms is acting on that BB..that's where you're going to get the most flex. Do you really think a big Al crank arm is going to bend before the tiny little square that the crank attaches to does?