Refers to the modification of the original wheel hub of the vehicle for aesthetic or other purposes.

　　According to the structure of the spokes, wheels can be divided into two types: spoke type and spoke type. The spokes of modern cars are diverse, integrated with the car's shape, and play a very good decorative role in the whole car. The use of spokes with fewer spokes is also conducive to the heat dissipation of the brake and tire pressure monitor. The spokes of the spoke-type wheels are disc-shaped spokes stamped or cast from steel plates; the spoke-type wheels use steel-wire spokes or cast spokes as spokes.

　　There are mainly two common forms of rims: deep groove rims and flat bottom rims, in addition to split rims, semi-deep grooved rims, and so on. Deep groove rims are used for cars and light off-road vehicles; flat rims are used for medium-duty trucks; split rims are used for medium- and heavy-duty off-road vehicles.