How to Fix Bike Disc Brake Rubbing

Overview

Rubbing disc brakes can slow you down. This guide covers fixing rubbing disc brakes.

Step-by-Step Fix

1. Begin by locating the two bolts that secure the brake caliper to your bike frame or fork; these are usually Hex/Allen bolts. Use an appropriately sized Hex key or Allen key to loosen both bolts just enough so that the caliper can move freely from side to side.
2. With the caliper bolts loosened, give the wheel a good spin to get it up to speed. Firmly and consistently squeeze the corresponding brake lever and hold it down, ensuring the pads fully engage the rotor.
3. While still holding the brake lever firmly, gradually and evenly tighten both caliper mounting bolts. Alternate between the two bolts, tightening them a little at a time until they are secure, then release the brake lever.
4. Before proceeding, visually inspect the brake rotor (the large metal disc) for any obvious bends or warps as it spins freely. If the rotor appears bent, a different repair or replacement may be needed; a bent rotor will continue to cause rubbing.
5. If rubbing persists after recentering, identify which pad is rubbing by looking closely at the gap between each pad and the rotor. You may need to use a small Hex key to micro-adjust the caliper's position slightly to eliminate the rub, or if your caliper has individual pad adjusters, turn the appropriate adjuster clockwise to move the pad away from the rotor.

Common Symptoms & Diagnostic Resolutions

Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.

Frequently Asked Questions