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Should Brake Pads Be Replaced at 4mm?

1 Answers

Nigel

07/30/25 8:12am

Brake pads at 4mm do not need to be replaced. Here is relevant information about brake pads: 1. Classification of brake pads: Asbestos brake pads (mostly obsolete), semi-metallic brake pads, low-metallic brake pads, NAO formula brake pads, ceramic brake pads, and NAO ceramic brake pads. 2. Ceramic brake pads vs. traditional brake pads: In traditional brake pads, metal is the primary material generating friction, providing strong braking force but with significant wear and a tendency for noise. After installing ceramic brake pads, no abnormal noise occurs during normal driving. Since ceramic brake pads do not contain metal components, they avoid the metal-on-metal friction noise between traditional metal brake pads and their counterparts (i.e., brake pads and brake discs). 3. Stable friction coefficient: Ordinary brake pads often use immature friction materials, with excessively high friction coefficients leading to unsafe factors such as loss of directional control during braking, pad burning, and disc scratching. Even when the brake disc temperature reaches as high as 650 degrees, the friction coefficient of ceramic brake pads remains around 0.45-0.55, ensuring the vehicle maintains good braking performance.

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