The so-called "tire" refers to the rubber part of the "wheel" of the car. It itself is soft, so the barrel shaped part of the inner contour of the tire supporting the tire and the center is installed on the shaft is called the wheel hub. Due to different language habits, many people have different names for the wheel hub, such as "rim", while many friends in the South call it "tire bell" or "car bell". Never say "car bell", It will be misunderstood as saying "car bell".

Bearing is the basis of automobile transmission parts and a part of the driving device on the automobile. It is known as "the joint of automobile industry" and is used to support the tire speed.

Automobile bearing is a large part of its bearing industry, including hub bearing, air conditioning fan bearing, pulley bearing and so on. It is also divided into high-speed automobile bearing and low-speed automobile bearing.