Why Do Brakes Lock Up?
2 Answers
Brakes lock up because in cars without ABS, when the brake pedal is pressed hard while driving, the wheel speed decreases rapidly. If the braking force exceeds the friction between the wheels and the ground, the wheels will lock up. If the front wheels lock up, the vehicle will lose steering ability. If the rear wheels lock up, it may cause the vehicle to skid, which is very dangerous, especially on rainy or snowy roads. ABS does not activate easily; it only intervenes during emergency braking. In such cases, the car will not experience tire lock-up or blowouts due to sudden braking, as the braking system adjusts accordingly. This not only reduces the pressure on the tires but also ensures the car maintains steering ability, thereby reducing the occurrence of safety accidents.
I remember when I was first learning to drive, I experienced brake lock-up, where the wheels suddenly stopped moving—it was really scary. The main causes are usually a stuck brake caliper, where dust or rust on the piston prevents it from sliding, or deteriorated brake fluid with too many impurities clogging the small holes. Additionally, after rain or driving through water, moisture can enter the braking system, leading to rust and lock-up. Uneven wear on the brake discs and pads can also cause high-temperature deformation, making them more likely to stick together. If this happens, don’t force the car to move, as it can damage parts or even cause a tire blowout. Pull over and check immediately—safety first. Regular maintenance, including cleaning the brake system and replacing brake fluid, can prevent most issues, especially if you drive an older car—pay extra attention to these details.
