At what level of wear must brake discs be replaced?
2 Answers
The replacement standard for brake disc wear is around 2 millimeters. If the brake disc wear exceeds 2 millimeters, replacement should be considered. Generally, the replacement cycle for front brake discs is 60,000-80,000 kilometers, while rear brake discs can last up to about 100,000 kilometers. However, this also depends on individual driving habits and usage conditions. If significant wear is observed, the brake discs should be replaced as soon as possible. During normal use of brake discs, if deep grooves are caused by hard objects stuck in the disc, or if the brake disc itself has quality issues leading to uneven wear, it should be replaced promptly to avoid safety problems. Do you understand at what level of wear brake discs must be replaced?
The main indicator for brake disc replacement is thickness. Generally, it's time to change when worn below the manufacturer's specified minimum thickness. New discs may measure over 20mm, with wear limits around 18mm. You can measure with calipers or have a professional shop check. When nearing the limit, symptoms include unusual noises, vibration, spongy pedal feel, and longer stopping distances. Delaying replacement accelerates pad wear and risks caliper damage, creating major safety hazards. I recommend checking during each service or every 5,000km by examining edge thinness. Remember: safety first—don't risk major accidents to save small money. Driving reliability is paramount; one delayed replacement could cause catastrophe.
