How To Fix Screeching Bike Brakes. Squeaky brakes in a bike can be pretty annoying. Put a few drops of oil on the nuts and washers and wiggle them around to get it on all the surfaces.
Remove and clean up the old pads or use new pads. The brakes on a bike need to be set up carefully the front of the block needs to touch the rim before the rest of the block thus is the toe in. Move the pad from the caliper and sanding down the outer layer with excellent grained sand paper with caution.
As contamination is a leading cause of squeaky brakes first check that the rims are oil free and that theres no build-up of dirt if so scrub them thoroughly with degreaser.
Sanding blocks or rims is something I would not recomend. If you do just wipe it off. Remove and clean up the old pads or use new pads. After moving back the pressure of the brake lets the rim quickly catch the rubber again reiterating the same process over and over again resulting in the high-pitched noise.
