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What is the Difference Between Brake Discs and Brake Pads?

2 Answers

McFinn

07/24/25 7:58pm

The differences between car brake pads and brake discs are as follows: 1. Different shapes: Brake pads are flat, plate-like components. Car brake discs are large, disc-shaped components. 2. Different operating methods: Car brake pads, like bicycle brake pads, do not move with the tire; they remain fixed. When braking, the brake pads press against the brake disc to increase friction and stop the vehicle. The brake disc is equivalent to the metal part of the bicycle tire that contacts the brake rubber. The brake disc rotates with the tire, and during braking, the brake pads immediately press against the brake disc, increasing friction to bring the car to an emergency stop. 3. Different replacement intervals: Brake pads typically need to be replaced every 30,000 kilometers, but this mainly depends on the actual usage of the vehicle by the owner. In theory, brake discs do not need to be replaced.

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CeciliaDella

08/11/25 10:58am

I've been driving for decades, and the difference between brake discs and brake pads is quite obvious. The disc is like a large iron plate fixed to the wheel and rotates; the pads, on the other hand, are the friction material blocks inside the caliper that press against the disc to slow down the car when braking. Their functions are completely different: the disc is the hard surface being pressed, while the pads are the active clamping components. Pads wear out faster because they are made of softer material, and for every two or three pad replacements, the disc needs to be replaced once; discs are more durable but can warp or rust. Their locations are also very different: the disc is visible on the outside, while the pads are hidden inside the caliper. I've also seen ventilated discs, which offer better heat dissipation and are suitable for frequent braking scenarios. Years of experience tell me that regular checks on brake fluid and wear are crucial to avoid losing control during high-speed braking and causing accidents. Remember to drive safely and don’t get tricked when replacing parts.

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