New brake pads need a sound, even surface to create consistent friction. A rotor that is deeply grooved, heat-spotted, too thin, cracked, or out of specification can cause noise, vibration, uneven wear, and reduced braking performance.

Whether rotors need replacement depends on measurement and condition—not a one-size-fits-all rule. Pete checks visible wear and the complete brake concern, then explains why a part is or is not recommended.

After brake work, correct bedding and careful early stops help the new friction surfaces mate properly. Follow the repair-specific guidance provided with your service.