If it is a scratch, it can be repaired with a special repair stick. If it is cracked and damaged, it can be repaired with a special aluminum welding machine for the hub, and then the hub can be refurbished and reshaped after welding. The wheel hub is the rotating part of the wheel core connected with the wheel steel of the inner contour of the tire through the column, that is, the metal part that supports the center of the tire and is installed on the shaft. Also called rims, rims, wheels and tire bells. There are many kinds of wheels according to their diameters, widths, molding methods and materials.