What's the name of that cover on the wheel and rail?
Wheel cover: inside the hub, then the drive shaft, is a large screw fastening, and some cars will also wear a clip on the screw to prevent the screw activities, and then put a wheel hub outside, it looks more beautiful
Besides, the utility model has the function of rust prevention and water proof for the big screw, because the water is not easy to corrode the screw
