Originally Posted by Baldie
How do I know when I need my rotors replaced? What do I need to look for? I know my pads need replacing because they are thin but not sure about my rotors.
What car, how many miles.
Look for scoring (grooves) and see if you get vibration under braking, but even then they can often be turned (filed down) to be usable again. Otherwise, a shop would have to measure them with a micrometer and see if they are still within spec.
04 Mazdaspeed Miata #2373/4000: IHI, BBS, Harddog, Flyin'Miata.