10 Causes of Grinding Noise When Braking Pads are Fine ...
The rotor can also rub against the caliper, scraping its metal surface. If left unchecked for long, the brakes will get broken down severely. 3. Worn-out Rotor Discs. Another possible cause of grinding noises when braking is worn-out rotor discs. Squeaking sounds can emanate from rotor discs that aren't flat.