Here relates to brake heat fade and the ablation problem. Thermal recession means brake wagon (or brake disc) temperature rise in a certain degree,

Brake is related to traffic safety components. If not timely replacement of brake pads, it would be easy to directly damage the brake disc, and brake safety coefficient decreased, affecting the traffic safety. So how to judge the brake pads must be replaced? Generally the wheel brakes of less than three mm, rear brake pads must be replaced when less than two