Bike Brake Pads: When to Replace Them

Brake pads are a wear item — they're designed to be replaced. Riding on worn brake pads is dangerous and can damage your rims or rotors. Here's how to check yours and know when it's time for new ones.

Rim brake pads

Rim brakes (V-brakes, caliper brakes, cantilever brakes) use rubber pads that press against the wheel rim to slow you down.

Signs they need replacing

• Wear line visible — most rim brake pads have grooves or a wear indicator line moulded into the rubber. If the grooves have disappeared or you've reached the line, replace them
• Thin pad material — if the rubber is less than 1–2mm thick, they're done
• Hardened or glazed surface — old pads harden and develop a shiny, glassy surface. They lose grip dramatically, especially in the wet
• Uneven wear — one end of the pad much thinner than the other. This also indicates the pad toe-in needs adjusting
• Squealing that won't stop — while squeaky brakes have many causes, hardened pads are a common one
• Metal showing — if you can see the metal backing plate through the pad material, stop riding immediately. Metal on rim damages the braking surface beyond repair

How long do rim brake pads last?

Typically 1,000–3,000 miles depending on riding conditions, terrain, and weather. Wet weather wears pads much faster because grit from the road mixes with water and acts as an abrasive compound.

Disc brake pads

Disc brakes use smaller, harder pads that press against a metal rotor mounted to the wheel hub. They come in two types: metallic (sintered) and organic (resin).

Signs they need replacing

• Less than 1mm of pad material — remove the wheel and look at the pads inside the caliper. If the friction material is thinner than 1mm (about the thickness of a coin), replace them
• Reduced braking power — you need to pull the lever further or harder to slow down
• Metallic scraping noise — a harsh metal-on-metal sound means the pad material is gone and the metal backing plate is grinding against the rotor. This damages the rotor and is extremely dangerous
• Lever pulling to the bar — if the brake lever pulls almost all the way to the handlebar, the pads may be very thin (or the hydraulic system needs bleeding)
• Contaminated pads — oil, spray lubricant, or brake fluid on the pad surface causes poor braking and squealing. Contaminated pads usually need replacing rather than cleaning. See our guide on disc brake contamination

How long do disc brake pads last?

• Organic (resin) pads: 500–1,500 miles. Quieter and better initial bite but wear faster
• Metallic (sintered) pads: 1,000–3,000 miles. Noisier but much more durable, especially in wet and muddy conditions

Mountain bikers and winter commuters will be at the shorter end of these ranges.

How much does brake pad replacement cost?

Brake pads are one of the cheaper maintenance items:

• Rim brake pads: £5–£15 per pair for the pads, plus £10 fitting and adjustment
• Disc brake pads: £10–£25 per pair for the pads, plus £10 fitting per brake

Compare that to the cost of a damaged rim (£30–£80+) or scored rotor (£15–£40+) from riding on metal.

Can I replace brake pads myself?

Rim brake pads are straightforward to replace with basic tools. Disc brake pads are also relatively simple if you know what you're doing, but getting the alignment right matters. If you're not confident, it's a quick and cheap job for a mechanic.