Process precision, high strength, light weight. Forging because the process is more complicated, thus the manufacturing cost is relatively high. High-end car with forging hub, and ordinary car with casting wheel hub. Of forging wheel manufacturing process is: first the aluminum piece after heated to a certain temperature, with forging press pressure into blank then blank spinning forming. The molecular structure of such a process, it will become very close together, can bear high pressure. Forging military grade aluminum wheel hub is used, the weight is lighter, forging hub can be further subdivided into one chip forging and multiple disk forging, a type of forging refers to the entire wheel hub is a integrated, light weight and reliable. Multiple disk forging rim and spokes separate, this structure has a benefit, is the replacement of spokes got the new wheel style. Relative to a chip for forging, multi-plate forging will be more heavier, has a high requirement for assembly.