The reasons why the brake disc does not wear well are as follows:

1. Drivers' driving habits. Long-term overspeed, frequent braking, overloading and long-term use under high temperature are the main reasons for the insensitivity of the brake disc.

2. Poor quality brake disc will also cause failure of brake disc.

3. Due to the long-term use of the brake clamp of the brake system of the brake disc, the brake will not return to its position, making the disc and disc (drum) drag and wear for a long time, resulting in severe wear.

4. It may also be because the material used in the brake disc is not required and the design density of the friction layer of the brake pad is unreasonable (too small).