When the brake disc have scratches or excessive wear, can cause the brake pedal vibrate or front shock, then need to replace a new brake disc, normally requires the two coaxial tray at the same time, to ensure that the two wheels can obtain the same braking effect.

Warning: use inferior will influence on the performance of the vehicle brake pads or cause brake disc abnormal wear. And in the process of the brakes shrieked and pedals.