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What Causes the Metal Friction Sound from the Wheels?

1 Answers

OGiselle

08/28/25 8:01am

Wheel metal friction sounds may be caused by the friction of the brake discs, indicating that the brake pads are worn too thin. It is recommended to visit an auto repair shop for replacement. This sound usually intensifies when braking and can be quite harsh. Considerations for selecting brake pads: Four key points: First, check the friction coefficient, which determines the basic braking torque of the brake pads. If it's too high, it can cause wheel lock-up, loss of control, and pad burning during braking; if too low, the braking distance becomes excessively long. Second, consider safety. Brake pads generate instant high temperatures during braking, especially during high-speed driving or emergency braking. At high temperatures, the friction coefficient of the pads decreases. Third, assess comfort, including braking feel, noise, dust, smoke, and odors, which directly reflect the friction performance. Fourth, evaluate lifespan. Typically, brake pads should last for about 30,000 kilometers. Two choices: First, always choose brake pads produced by reputable manufacturers. These should include a license number, specified friction coefficient, compliance standards, and the packaging should contain a certificate of conformity, production batch number, and production date. Second, opt for professional installation at a specialized repair point.

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