What is the reason for the car rolling back even after pulling the handbrake on a slope?
2 Answers
The reason for the car rolling back even after pulling the handbrake on a slope is that the handbrake was not pulled to the proper position. In this case, simply pull the handbrake to the designated position again. Below are the relevant explanations: 1. Handbrake: The professional term for the handbrake is the auxiliary brake. Unlike the principle of the main brake, it uses a steel cable connected to the rear brake shoes to brake the car. Long-term use of the handbrake can cause the steel cable to undergo plastic deformation. Since this deformation is irreversible, prolonged use will reduce its effectiveness, and the handbrake's travel will also increase. 2. Return spring: The handbrake is also used in conjunction with a return spring. When the handbrake is engaged, the spring is stretched, and when the handbrake is released, the spring returns to its original length.
I've been driving for twenty years, and it's quite common for cars to roll even with the handbrake on when parked on a slope. It could be that your handbrake isn't pulled tight enough, especially if the brake cable is loose or worn out, making it unable to hold the wheels. In cases I've encountered, the car slid downhill because the rear brake pads were severely worn, reducing friction between the rubber and metal. Additionally, slippery or wet ground can decrease tire grip. The weight of the car also plays a role—for example, a heavily loaded trunk can make the car more prone to tilting forward and sliding. For safety, always engage the P gear and pull the handbrake as a double precaution, and regularly check the wear on your brake system. I recommend getting it professionally adjusted every six months to avoid any nerve-wracking moments while driving.
