Car owners know more about car tires, but car wheels are often ignored. Tires are like shoes, and wheels are people's feet. If humans want to walk normally, they must never stop caring for their feet. , the same is true for cars, the unique structure requires car owners to spend more time to understand. [Wheel hub] is a cylindrical metal bracket that supports the tire. Without the hub, the tire can be said to be a balloon. The combination of the two is indispensable. Otherwise, there is absolutely no way to walk normally. There are all kinds of strange designs on the market. , domineering yet beautiful, the grade of a car is directly related to the wheels of the car. [Wheel material] Car wheels are generally divided into two types: steel wheels and aluminum alloy wheels. Their materials are carbon steel, ductile iron and aluminum as the basic material, and are made of manganese, magnesium, titanium and other elements. , due to different designs, the requirements for materials are naturally different. [S