What is the Difference Between Brake Discs and Brake Pads?
3 Answers
Here are the specific differences between brake discs and brake pads: 1. Function: During driving, the brake disc rotates with the tire. The brake caliper clamps the brake disc to generate braking force, thereby slowing down or stopping the vehicle. The brake pads are installed inside the brake caliper. When the brake is applied, they are pressed against the brake disc or brake drum, creating friction to achieve vehicle deceleration and braking. 2. Replacement cycle: The replacement cycle for brake discs is longer than that for brake pads. Under normal driving conditions, the front brake pads need to be replaced every 30,000 to 50,000 kilometers, while the rear brake pads require replacement every 60,000 to 80,000 kilometers. In contrast, the front brake discs need replacement every 60,000 to 80,000 kilometers, and the rear brake discs only require replacement around 100,000 kilometers.
As someone who frequently works on cars, I think of brake discs as those large iron discs fixed to the wheels that rotate along with them when you drive. Brake pads, on the other hand, are the friction pads installed inside the calipers—they press firmly against the disc surface to slow down the car when you hit the brakes. The discs are usually made of cast iron, which is sturdy and durable but still wears down over time. The pads are made of ceramic or composite materials, wear out more easily, and need frequent replacement. I’ve replaced them several times, and my experience tells me that pads typically need changing every 20,000 kilometers, costing a few hundred yuan. The discs can last over 50,000 kilometers, but if you neglect inspections, they can rust or warp, leading to brake shudder. Remember to maintain them regularly—checking brake fluid and wear conditions can help avoid hazards.
I enjoy maintaining my car myself. The brake disc is that round metal plate directly connected to the wheel, providing a friction surface when rotating; the brake pads are small friction blocks clamped in the brake caliper, gripping the disc under pressure to slow down. The disc surface is smooth, often made of iron alloy for durability; the pads are softer and wear out more easily. On average, replace the pads every two years, while a disc can last up to ten years. When changing pads, also check the disc surface for grooves—timely treatment can extend its lifespan. Cost-wise, pads are inexpensive, just a few dozen yuan; disc replacement is pricier, costing thousands, but proper maintenance can save big money. Remember, sudden braking accelerates wear, so developing a habit of gentle braking protects both your car and safety.
