What Causes the Rear Wheels to Lock Up?

[DiAiden]

Rear wheel lock-up may occur due to water ingress in the rear wheels, causing the brake pads and brake drum to seize. Related explanations: 1. Wheel lock-up: Wheel lock-up refers to the sudden locking of the wheels when braking, resulting in the loss of steering control, typically occurring in vehicles not equipped with ABS (Anti-lock Braking System). 2. Phenomenon overview: In cars without ABS, if the brake pedal is pressed hard while driving, the wheel speed rapidly decreases. When the braking force exceeds the friction between the wheels and the ground, the wheels will lock up. Fully locked wheels increase the friction between the tires and the ground, potentially leading to skidding and loss of control under significant inertia. If the front wheels lock up, the driver loses control over the vehicle's direction; if the rear wheels lock up, skidding is more likely to occur.