1. First of all, look at the coefficient of friction, the friction coefficient determines the basic brake pad braking torque, too high will cause the wheel lock braking process, the direction of loss of control and burn film, too low braking distance is too long.
2. Look at the safety, brake pads will produce instantaneous high temperature when braking, especially at high speed or emergency braking, under high temperature condition, friction coefficient of friction plate will decrease.
3. To see if the comfort, including brake feeling, noise, dust, smoke, smell, etc., is a direct manifestation of the friction performance.
4. See life expectancy, usually brake pads can guarantee 30,000 km of life.