I believe that when replacing the brake pads, many car owners may find that the brake pads of the front wheels are larger than the brake pads of the rear wheels, no matter whether it is a front-wheel drive vehicle or a rear-wheel drive vehicle. Wheel brakes wear out faster, so why is that?
–Although the frequency of use of the front and rear brake pads of the same car is basically the same, the braking force of the front and rear brake pads on the wheels is different. The front wheels require more braking force. Therefore, equipping the front wheels with large-size brake pads is precisely to ensure that the front wheels can still have stable and effective braking performance when they bear more than half of the body weight.
–At present, most models on the market adopt the drive layout of front and front drive. Generally, the front and rear weight ratio of such models is 60:40; The ratio is only close to 50:50, but the front is still heavier than the rear.
–During the braking process of the vehicle, the wheels decelerate first, and the body will still have a forward momentum due to the inertia. At this time, the weight of the body will accumulate on the front wheels, and the pressure on the rear wheels will decrease instead. In addition, the weight of the front of the car is heavy, and the pressure on the front wheels is also high, so the brake pads wear out faster than the rear wheels.

So How often should brake pads be replaced?

–The replacement time period of the brake pads is not fixed, it depends on the driving conditions of the vehicle, the frequency and strength of the driver stepping on the brake pedal, the thickness of the new brake pads is generally about 1.5cm, with the daily friction loss When the thickness of the brake pads is only 1/3 of the new ones, it is necessary to increase the frequency of inspection and be ready to replace with new brake pads at any time. There will be small raised signs on both sides of the brake pad.

Do I have to change brake pads when changing brake discs?

–When replacing the brake pads, it is not necessary to replace the brake discs together. The replacement of the brake discs depends on the thickness and wear of the brake discs.

–Most brake disc products have wear indicators, which are 3 small dimples distributed on the disc. Use a vernier caliper to measure the depth of the small hole and it is 1.5MM. That is to say, if the total wear depth of both sides of the brake disc reaches 3MM, the brake disc needs to be replaced in time.

–However, not all brake discs have wear indicators. You can also touch the outer edge of the disc with your hand to determine the approximate depth. Generally speaking, if the total wear depth of both sides of the brake disc reaches 3MM, it is It’s time to replace the brake discs.