Originally posted by bac
I'd like to try a different crank arm length. I'm currently running a 175 on my Trek 5200 which has an Ultegra triple. I'd like to go to a 172.5, or a 170. I assume that I need only replace the right and left crank arms to accomplish this?? If this is the case, how do I do it? Do I need to torque the bolts? Locktight?
ThanX!!!!
to remove the crank arms, you will need to use a crank puller, (park tools makes a real nice one) specific to your bottom bracket (square, splined...) when you put the new cranks on you just need to tighten the bolts down (probably will be specific ft lbs in the instructions with the cranks), I have never used locktight....
as a final note, getting a new matching bottom bracket may not be a bad idea, as the splines could be different.