What is the reason for the outer edge of the brake disc not being worn?
2 Answers
The reason why the outer edge of the brake disc is not being worn is introduced: The brake pads are uneven, and the brake pads should be replaced in time. Car brake pads, also known as car brake linings, refer to the abrasive materials fixed on the brake drum or brake disc that rotates with the wheel. The friction linings and friction blocks bear external pressure and generate friction to achieve the purpose of vehicle deceleration. The following is the relevant introduction about brake pads: 1. Brake pad maintenance: The braking effect of the car is determined by the brake pads, which are very important for the vehicle. Daily inspection and protection are indispensable. Under normal driving conditions, the brake shoes should be checked every 5,000 kilometers. Not only the remaining thickness should be checked, but also the wear state of the shoes, whether the wear on both sides is the same, whether the return is free, etc. Any abnormal situation must be dealt with immediately. When the thickness of the brake pads is about 0.5 cm, they should be replaced. 2. Brake pad replacement: It is best to replace the brake pads with the original spare parts provided by the manufacturer. Only in this way can the braking effect between the brake pads and the brake disc be the best, and the wear is the smallest. After replacement, be sure to step on the brakes several times to eliminate the gap between the shoes and the brake disc, otherwise, the first step may not brake, which can easily cause an accident.
I've seen this situation quite often. The outer edge of the brake rotor not being worn usually happens because the brake pads are too small or improperly installed, failing to fully cover the rotor surface. It could also be due to stuck caliper pistons that can't evenly push the pads to contact the entire rotor. Additionally, rust or dirt on the guide pins can restrict pad movement, causing only the middle section to wear. Personally, I've also encountered slight rotor warping leading to uneven wear. This not only reduces braking efficiency but can also cause noise and increase stopping distance, posing serious safety risks. Regular maintenance should include lubricating guide pins and checking pad thickness. If you notice unworn areas on the rotor edge, visit a professional shop immediately before the rotor gets ruined or accidents occur. Avoid sudden braking in daily driving to minimize extra wear - this might seem minor but directly impacts safety.
