There are many misconceptions about the structure and materials used, such as smelling brake pads, look at the color of the brake pads to determine the quality of the quality, which is Because I don’t know the material composition of the brake pads. It’s good to pass the yellow brake pads for a while. The black brake pads that have been circulating for a while are high-grade brake pads, used gray brake pads. It feels better, and the brake pads of other colors are considered to be bad quality brake pads.