iron hub, which has two advantages, low price and good flexibility. It costs three or four hundred yuan to change an iron wheel hub, and it costs six or seven hundred to one or two thousand to change an aluminum wheel hub. The price difference between the two is very big. The iron hub has good flexibility, and it can be repaired if it is deformed in a single place. For example, if the hub is deformed when it is in contact with the tire when it is on the road, it can be repaired by plastic surgery, and it can still be used for a while. Of course, if there is a slow air leakage phenomenon, it needs to be replaced. Its disadvantages are heavy weight, easy deformation and unsightly appearance. Aluminum alloy wheel hub, the disadvantage is that it is expensive and the edge is broken and cannot be repaired. There are many advantages. First of all, it looks good, can be made into various styles, and has good visual effects. It is mainly a matter of face. Aluminum alloy wheels are generally high-end cars. When you see iron wheels, you must buy low-end cars. Secondly, it has real advantages. Because the density of aluminum is smaller than that of iron, and because of the shape, aluminum alloy wheels are lighter than iron wheels, about one or two kilograms lighter.