You can change brake pads yourself with basic tools and no special skill
Bicycle brake pads wear down from friction and need replacement every 6 to 12 months, depending on how often you ride and the weather where you live. You do not need to visit a shop — the job takes about 30 minutes and costs between $15 and $50 for a set of pads. All you need is a 5mm Allen wrench (or the size that fits your brake), new pads matched to your brake type, and possibly a small flathead screwdriver.
The process differs slightly between rim brakes and disc brakes, but both follow the same logic: remove the wheel or rotor, take out the worn pads, slide in the new ones, and adjust so they sit the right distance from the braking surface. This guide covers both types so you can see which one you have and follow the matching steps.
Key Takeaways
- Rim brake pads sit on the wheel rim and are easier to access; disc brake pads sit inside a caliper on the rotor and require slightly more precision.
- You must buy pads that match your brake model — Shimano, SRAM, and Avid pads are not interchangeable — so check your brake before ordering.
- After installing new pads, you will need to adjust the caliper so the pads are centered and sit the correct distance from the rim or rotor.
- Rim brake pads usually wear evenly and last longer; disc brake pads wear faster but stop better in wet weather.
Identifying your brake type and getting the right pads
Look at your wheel. If the brake arms squeeze the metal rim of the wheel itself, you have rim brakes. If the brake is a small box-shaped mechanism attached to the frame or fork near the center of the wheel, and the braking surface is a metal disc bolted to the hub, you have disc brakes.
Once you know which type you have, check the brake manufacturer. Look for a name stamped or printed on the brake arm or caliper — common brands are Shimano, SRAM, Avid, and Tektro. Write down the exact model number if you can find it. Take a photo of the brake and bring it to a bike shop, or search the manufacturer's website for your model and the correct pad part number. Buying the wrong pads will mean a wasted trip home.
Rim brake pads come as a pair (left and right) and cost $15 to $30. Disc brake pads come as a set of four (two per wheel) and cost $25 to $50. Some pads come pre-installed in a metal carrier; others are loose. Both work the same way.
Changing rim brake pads step by step
Start by removing the wheel. Flip the bike upside down so it rests on the handlebars and seat, or use a bike stand. Open the quick-release lever on the wheel axle (or unscrew the axle bolts if your bike has them) and slide the wheel out of the frame. Set it aside where it will not roll.
Locate the brake pad holder — a small metal block that sits against the rim. You will see a bolt running through it, usually a 5mm Allen wrench size. Loosen this bolt by turning it counterclockwise, but do not remove it completely. The pad holder should now slide out slightly. Slide the old pad out of the holder and discard it. Repeat on the other brake arm.
Slide the new pad into the holder from the same direction the old one came out. The pad should sit flat against the holder with no twisting. Tighten the bolt back down, but leave it loose enough that you can still move the pad by hand — you will adjust it in the next step. Repeat on the other brake arm.
Now adjust the pads so they sit parallel to the rim and centered between the rim edges. Spin the wheel by hand. The rim should pass through the brake arms with about 1 to 2 millimeters of space on each side. If a pad is too close, loosen its bolt slightly and nudge the pad away from the rim, then tighten. If both pads are too close, you may need to adjust the brake arm itself — consult your brake manual or a shop for this step. Once the spacing looks even, tighten both pad bolts firmly and spin the wheel again to confirm it does not rub.
Changing disc brake pads step by step
You do not need to remove the wheel for disc brakes. Flip the bike upside down or use a stand. Locate the brake caliper — the small rectangular box clamped around the rotor near the wheel hub. Look for the pad retaining pin, usually a small bolt or clip on the side of the caliper facing you. Use a 5mm Allen wrench or flathead screwdriver to remove it, depending on your brake model.
Once the pin is out, the brake pads should slide out toward you. If they are stuck, gently pry them out with a flathead screwdriver, being careful not to damage the rotor. You will see a metal spring behind the pads — this is normal and stays in place. Slide the new pads in from the same direction, making sure they sit flat and centered in the caliper. The pads should slide in smoothly without forcing.
Reinstall the retaining pin and tighten it firmly. Spin the wheel by hand. The rotor should pass through the caliper without rubbing. If you hear a light scraping sound, the pads may be slightly off-center. Loosen the caliper bolts (usually two bolts on the back of the caliper) by a quarter turn, squeeze the brake lever a few times to center the pads, then tighten the bolts again. Spin the wheel once more to confirm the rotor passes freely.
Bedding in new pads for best stopping power
New pads need a short break-in period before they reach full stopping power. Ride at a moderate speed and explore the brakes gently 10 to 15 times, letting the bike slow down gradually rather than stopping hard. This heats the pads and rotor (or rim) evenly and helps the pad material bond to the braking surface.
After this short ride, let the brakes cool for a few minutes, then test them at normal speed. The stopping power should feel firm and responsive. If the brakes feel spongy or weak after bedding in, the pads may not be seated correctly — remove the wheel and check that the pads are sitting flat and centered.
Signs that your brake pads need replacing sooner
Brake pads wear faster if you ride in wet or muddy conditions, use your brakes heavily on long descents, or carry heavy loads. Check your pads every month by looking at them directly. Most pads have a wear indicator line or groove molded into them — when the pad surface reaches that line, it is time to replace them. If you cannot see a line, measure the pad thickness with a ruler; pads thinner than 1 millimeter should be replaced.
Listen for squealing or grinding sounds when you brake. A high-pitched squeal usually means the pads are glazed (overheated) or contaminated with dirt, and replacing them will fix it. A grinding sound means the pads are worn through to the metal backing, which can damage the rim or rotor — replace them when ready to avoid costly repairs.
Frequently Asked Questions
Do I need to remove the wheel to change disc brake pads?
No. Disc brake pads are accessible from the side of the caliper without removing the wheel. Rim brake pads require the wheel to be out of the frame so you can access the pad holder from both sides.
What if the new pads rub against the rim or rotor after I install them?
Rubbing usually means the pads are not centered. For rim brakes, loosen the pad bolt slightly and nudge the pad away from the rubbing spot, then retighten. For disc brakes, loosen the caliper bolts a quarter turn, squeeze the brake lever to center the pads, and retighten the bolts.
Can I use any brand of brake pads on my bike?
No. Pads must match your brake manufacturer and model. Shimano pads do not fit SRAM brakes, for example. Check your brake name and model before buying, or bring a photo to a bike shop and ask them to confirm the correct part number.
How long do new brake pads last?
Rim brake pads typically last 6 to 12 months of regular riding. Disc brake pads wear faster and may need replacement every 3 to 6 months, especially if you ride in wet weather or use your brakes frequently. Heavier riders and those who ride downhill often will see faster wear.
What should I do with the old brake pads?
Dispose of them in the trash. Some bike shops will take old pads for recycling, so you can ask when you buy the new ones. Do not pour any brake fluid or cleaner down the drain — if your pads came with cleaning instructions, follow them before disposal.