Bike Disc Brakes Make Grinding Noise

Hi i ve recently bought a rockhopper 29er after about 50 miles both the front rear disc brakes started making grinding noises under heavy breaking.

Bike disc brakes make grinding noise. Again the most common cause of disc brakes squealing is due to contamination of the rotor or pads. The pads and rotors are now metal to metal with no braking material left. The most common cause of screeching disc brakes is dirty contaminated rotors or pads. I show the steps to repair the squeal on a bicycle disc brake.

That s why you have to be very careful when using spray lubricants on a bicycle with disc brakes probably best to avoid using spray lubes anywhere near a bike with disc. Disc brakes rubbing grinding noise while braking after some light downhill trail today i ve noticed that at lower speed it makes a grinding rubbing noise especially rear brake. And let s face it. The causes of noisy disc brakes are much the same as it is for rim brakes.

A grinding noise on braking is usually caused by a lack of brake pad material. I ve tried spinning wheels freely and i don t hear any noise rubbing disc whatsoever which means calipers are adjusted properly. A set of disc brakes that hasn t been bedded in properly is easy to spot and even easier to hear. If your road bike rim or disc brakes are making a lot of noise there s probably something wrong with them.

Rubbing disc brakes can make irritating noises slow you down and cause premature wear to both your pads and rotor. Your brakes are the one component that you don t want to go wrong. Loud squealing noises are often caused by poor or non existent bedding. Usually cleaning them will solve the problem.

The most common reason for disc rub is bad caliper alignment something that s.