Robson
Well-Known Member
I have this bike https://www.vitalmtb.com/product/guide/Bikes,3/Specialized/Stumpjumper-Comp-Carbon-29-6Fattie,20894 and would like to upgrade to shorter crank arms,165 or 170.
Bottom bracket shell is PF30 73x46mm. I can't figure out what would fit in.
Bottom bracket shell is PF30 73x46mm. I can't figure out what would fit in.