Cranks

longer ones provide more leverage uphill, while shorter ones spin faster, put less strain on the knees and hips, and are also suitable where there is a risk of hitting the ground in a corner. You will notice a five-millimetre difference mainly in your cadence. Before buying, find out your bottom bracket standard, as there are many of them and they are not interchangeable. Carbon weighs less, while aluminium withstands a rock strike better. Follow the tightening torque according to the manual.