Bearings are widely used in various machinery. Bearings are a key component of motorcycles.

Motorcycles vary according to different models and structures. But every motorcycle is generally equipped with 20 to 30 bearings. These bearings are used to support important rotating parts such as the engine, transmission, wheels, etc., and are responsible for reducing friction and promoting the power of the engine to be reliably transmitted to the wheels.

In motorcycles, deep groove ball ball bearings are generally used in the internal drive train and wheels of the engine; needle roller bearings are applied to the crankshaft connecting rod and part of the transmission gear shaft.

Generally speaking, bearings used on the front wheels of motorcycles under 100cc are 6200, 6201, 6300, 6301 and the rear wheels are 6301; 125cc, 150cc motorcycles commonly used 6301 bearings for the front wheels, and the commonly used bearing models for the rear wheels are 6202, 6302, 6200, 6201, 6202, 6203, 6204, 6205, 6206, 6300, 6301, 6302, 6000, 6001, 6002, 6003 , 6004, etc.