How to adjust your bike brakes (disc and rim)
Brakes that rub, feel spongy, or pull to the bar are usually a quick fix. Here are the common adjustments for both rim and disc brakes — and an honest note on where to stop.
Safety first: brakes are the one system not to guess on. These are the standard at-home adjustments, but if something feels wrong after — soft lever, uneven bite, anything you're unsure of — get a shop to check it. They'll do it cheaply, and it's not worth the risk.
Rim brakes
Brake rubbing the rim
- Check the wheel is seated squarely in the dropouts and the tire is true.
- Most rim calipers have a centering screw (or you nudge the caliper by hand) to balance the pads evenly on each side.
Weak braking / lever pulls too far
- A stretched cable is usually the culprit. Turn the barrel adjuster (where the cable enters the lever or caliper) counter-clockwise to take up slack and bring the pads closer.
- For a bigger adjustment, loosen the cable pinch bolt, pull a little more cable through, and re-tighten.
Worn pads
If the pads are worn to the line, no adjustment will save them — replace them. See when to replace brake pads.
Disc brakes
Rotor rubbing (the "ting… ting…" as the wheel spins)
- Make sure the wheel is fully seated in the dropout/axle.
- Loosen the two caliper mounting bolts slightly, squeeze and hold the brake lever (which centers the caliper over the rotor), then re-tighten the bolts evenly while holding the lever.
- Still rubbing? The rotor may be slightly bent — a shop can true it.
Lever pulls too far / weak bite
- Mechanical (cable) disc brakes: use the barrel adjuster or the pad-adjust dial to bring the pads closer as they wear.
- Hydraulic disc brakes: a spongy lever usually means air in the system, which needs a bleed — best left to a shop unless you have the kit and the know-how.
Contaminated pads (weak braking + squeal)
Oil or brake fluid on the pads or rotor kills braking and can't be cleaned off easily — the pads usually need replacing and the rotor degreasing.
When it's not adjustment
If braking is weak no matter what you do, the pads are likely worn out — that's a replacement, not an adjustment, and an important one to stay ahead of. Tracking distance since your last pad change means you replace them on time instead of discovering it on a descent. For the whole bike, see our maintenance schedule by mileage.