Swapping rotors with pads depends on the compostion of the pad. Sometimes you will get buildup on the rotor from mixing different compositions. What people think are warped rotors is usually this build up. I don't replace rotors or pads until I need to. Maybe if I was doing only street driving I would. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org |