If the wheel is compared to a part of our body, the wheel hub is equal to our feet, and the tire is the shoe on our feet. But many people don't pay much attention to the wheel hub, but it has a lot of valuable knowledge worth learning. We often say that the wheel rim or bell is the wheel hub. It is the part that supports the tire on the inner side of the tire, and the most central part is installed on the shaft. It is barrel shaped. Not all wheels are the same. The appearance design, material and size are different. The origin of the wheel hub can be traced back to a long time ago. At that time, the wheel hub was just an embryonic form. As we all know, ancient means of transportation generally evolved from stones to wooden piles, and the wheels on carriages were invented. However, the wheel hub of the car cannot be separated from the evolution of the carriage, but the appearance of the early wheel hub was that there were cross bars everywhere on the wheel. Just like the wheel hub of our bicycle now, it was easy to distinguish the wheel hub from the wheel rim at that time. The wheel hub we are talking about now is universal. It is composed of parts between axle and tire.