I was recently helping a friend build a bike from scratch, and one of the first things he did was to inspect the hub to check that the wheel was rotating smoothly. He was adjusting the cone and lock nuts.
How large (or small) of an efficiency boost do you see from such adjustments? I'm a commuter using a single-speed daily -- if I were to rebuild my hub and do the same adjustments, would I see a significant improvement?
Sorry for the newbie question! Thanks in advance.