How to Adjust Bike Rim Brakes

Overview

Properly adjusted rim brakes are essential for safety. This guide covers adjusting rim brakes.

Step-by-Step Fix

1. Firstly, visually inspect your brake pads to ensure they are not excessively worn down, looking for grooves or a significant reduction in thickness; if they are thin or have a visible wear indicator, replace them before proceeding to ensure effective braking.
2. Locate the cable bolt that secures the brake cable to the calliper arm and use the appropriate spanner or Allen key to loosen it slightly, allowing the cable to slide freely; then, firmly pull the brake cable taut with your other hand, removing any slack before retightening the bolt securely.
3. Check that both brake pads are an equal distance from the rim and make full, flat contact with the braking surface when the lever is squeezed; if they are not, gently adjust the calliper's position side-to-side until it is centred, ensuring neither pad rubs the rim constantly.
4. Ensure the brake pads are aligned correctly, contacting the rim's braking surface squarely without touching the tyre or dropping below the rim's edge; adjust the pad angle and height using the small bolt on the brake arm until they sit perfectly, tightening securely to prevent movement.
5. Finally, test the brake lever by giving it a firm squeeze, checking for a positive, responsive feel and ensuring the pads engage the rim effectively without being too spongy or too stiff; the lever should stop short of touching the handlebar and release smoothly when let go, allowing the wheel to spin freely.

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