What does 12/32 mean for brakes?

The "12/32" on brake pads usually indicates their thickness specification, where "12" represents the initial thickness of a new brake pad (approximately 12 millimeters), while "32" may be an internal manufacturer code or a specific series number and is not an industry-wide standard. The thickness of new pads generally ranges from 10 to 15 millimeters, and they must be replaced when worn down to 3 to 5 millimeters to avoid brake failure or damage to the brake disc. When choosing brake pads, priority should be given to materials (such as ceramic or semi-metallic) and friction coefficient grades (e.g., grade F is suitable for daily driving), while ensuring the product has certifications like ECE R90. After replacement, a break-in period of 200 to 300 kilometres is required to optimize performance.