Should Rear Brake Pads Be Replaced at 5mm?
2 Answers
Typically, a brand-new set of brake pads has a thickness of around 1.5cm. When the thickness of the brake pads is less than 5mm, they need to be replaced. Introduction to Brake Pads: Brake pads are composed of friction material layer, heat insulation layer, adhesive layer, backing plate, etc. The brake pads work by the brake caliper pushing the backing plate to press the friction material against the brake disc for braking, so the quality of the friction material is particularly important. Precautions for Brake Pads: Emergency braking causes significant damage to the brake pads. Therefore, when driving normally, it is advisable to brake gradually or use the method of intermittent braking (pumping the brakes), which results in less wear on the brake pads.
Rear brake pads at 5mm don't need immediate replacement, but you should schedule an inspection soon. New pads are typically 10-12mm thick - while 5mm isn't considered thin yet, it's already past halfway worn. When worn below 3mm, it becomes dangerous as braking performance significantly deteriorates, potentially failing to stop in emergencies. As someone who drives frequently, I've experienced similar situations. Delaying replacement risks damaging the brake rotors, potentially doubling repair costs by hundreds or even thousands. I recommend doing quick checks: listen for metallic screeching when braking or notice reduced stopping power. When in doubt, get a free thickness measurement at chain shops. Driving habits matter too - my frequent city traffic with constant braking accelerates wear, requiring earlier prevention. Don't wait for the warning light - safety comes first. Replacement only costs 200-300 RMB for peace of mind.
