In addition to beautiful, it has other functions - to tell you a real "wheel hub"
We often say that the round iron ring (or aluminum ring) loaded with tires is actually not the hub, its scientific name should be "wheel", because it is generally made of steel, so many times also called "steel ring". As for the real "hub" is its neighbor, refers to the installation of a support on the axle (or steering knuckle), it is generally through the internal and external two cone bearings (can also use a double bearing) set on the axle, and fixed with a lock nut. It is connected with the wheel through the tire screw, and together with the tire to form the wheel assembly, which is used to support the car and drive the car. The wheels that we see spinning rapidly are essentially the rotation of the wheels. It can also be said that in the three components of the hub, rim and tire, the hub is an active part, while the rim and tire are passive parts. It should be noted that the brake disc (or brake basin) is also installed on the hub, and the braking force of the car is actually borne by the hub.