第一的, 听声音. 踩刹车时, 如果您听到 “吱吱作响” 或金属研磨声音, 它表明刹车片已磨损到极限，并开始擦在刹车盘上. 在此刻, 有必要立即更换它们.
第二, 检查厚度. 新的刹车片很厚, 但是，如果将它们磨损到不到五毫米不到五毫米, it’s time to replace them.
第三, 依靠你的脚感觉. 踩刹车时, if you feel that the brake becomes soft and you have to step deeper to stop, and you notice the car deviates from a straight line when braking, this is a sign that the brake pads are getting thinner.