Contour Enthusiasts Group Archives Forums Modifications Brakes Another set of warped rotors

Rotors rarely actually warp. What happens is they develop hard spots which make themsleves worse over time, by way of getting hotter than the surrounding material, and those hard spots stay "high" relative to the rest of the rotor and then you have the real problem: Disc Thickness Variation.

It can be caused by improper bedding of the brake pad material, it can be caused by using the brakes too hard and then sitting with your foot on the brake, it can be caused by improper rotor seasoning, and it can be caused by [censored] rotor material in the first place.