This article explains the difference between shifting and single-speed bikes (3)

This article describes the adjustment of a bicycle derailleur

This article describes the removal and installation of the bicycle flywheel

As a very important part of the bicycle system, the wheel set, its weight, rigidity, drag coefficient and other factors have a great influence on the performance of the bicycle.

The rolling part of the bearing hub is mainly composed of high-precision ball bearings, and some are combined with balls. Usually, there are 2 bearing, 3 bearing and 4 bearing, which represent the number of bearings inside the hub, of which 3 bearing and 4 bearing is mainly used on the rear hub.

I don't know if you have such an experience, that is, the riders around you are chasing hubs with a very loud number. For example, I pursue a lot of 120-ring hubs. In fact, it does not mean that the louder the hub is, the better.