How to Look After Disc Brakes on Your Bike
Disc brakes are now standard on almost every new bike — but most riders do not know what they actually need to stay in good working order.
Why Do Disc Brakes Need Different Maintenance Than Rim Brakes? Disc brakes work by clamping brake pads against a metal rotor attached to the wheel hub, rather than against the rim itself. This makes them more powerful and more consistent in wet conditions — but it also means the rotor and pads are highly sensitive to contamination. Even a tiny amount of oil, lubricant, or brake fluid on a disc rotor or pad will cause the brakes to squeal, fade, and ultimately fail to stop the wheel properly. What Contaminates Disc Brakes? Chain lubricant overspray — the most common cause of contaminated disc brakes. Always apply chain lube carefully and wipe away any excess before it migrates to the rotor. Brake fluid — a hydraulic brake bleed that leaks even a small amount of DOT fluid or mineral oil onto the rotor or pads will contaminate them instantly. Pads cannot be decontaminated once soaked in brake fluid. Cooking spray, WD-40, or general lubricants — never spray anything near a disc rotor. Thes