6002-2RSH. The Xiaoniao brand was originally a famous trademark in Tianjin. On December 31, 2012, it was recognized as a well-known trademark in China by the State Administration for Industry and Commerce. Its electric vehicles are well-known sales products. In the instruction manual of the electric vehicle, the rear wheel bearing marked is 6002-2RSH dimensions. The main function of the bearing is to bear load and provide precise guidance for the rotation of the wheel hub. It bears both axial load and radial load, and is a very important component.