Q&A for How to Adjust Bike Brakes

The calipers have an internal recoil spring on each side. The small screw on the side near the pivot mount increases or relieves the tension. A clock-wise turn pulls that side away from the rim, while a counter-clockwise turn on the opposite side will help pull the closer pad away from the rim. Adjust each at the same time in half-turn increments, testing the brake pull after each adjustment. Usually the pads can be centered evenly after 2.5 to 3 turns. Neither side should be full-turned to its maximum in or out. Lubricate the pivot mount with a little WD-40 and insure the brake cable is not binding.

There is a recoil spring tension adjustment on the calipers near the mounting pivots on each side. Turning it clockwise increases the tension on the internal spring, allowing it to pull farther away from the rim. The side that is moving too far would need counter-clockwise turns to relieve tension, and the side not pulling away enough, clockwise turns. Turn these screws in half-turn increments, testing after each adjustment. Each side works together and should be adjusted at the same time.

First check that the brake pads are in good condition. If they are not, then replace them. If it's still not working, then check the lever that around the wheel that is holding both the brake pads in position and adjust the lever by loosening the central screw on it. Make sure that both the brake pads are in equal distance from the rim of wheel and then tighten the screw again.

Your brake pads may have decayed and or got flattened by friction. Change the brake pads and you will see that they will make no noise.

Take a wrench and tighten the bolt that fastens the pads until they almost touch the rim.

You will probably have to adjust the mudguard higher up until it doesn't touch the tire.

Use a wrench to loosen the bolt that fastens the pads to the brake.