How to replace disc brake pads

Worn brake pads reduce braking power and can damage your rotor. In this guide, you’ll learn how to replace disc brake pads safely and correctly in just a few steps.

> Jump to step-by-step guide

What you’ll learn

The following sections explain everything you need to know about changing the pads on your disc brake:

Material and tools for changing the brake pads on the bike

WHAT YOU'LL NEED

Tools and materials

Compatible disc brake pads
Allen key or Torx key
Piston reset tool or plastic tire lever
Brake cleaner and clean cloth (optional)
Repair stand (optional)

Always make sure the replacement pads match your brake model.

When should you replace disc brake pads?

Replace your brake pads if:

Braking power feels weak
The lever pulls further than usual
Your brake is squeaking
Pad material is less than 1 mm thick

Minimum total thickness (pad plus backing plate) varies by manufacturer:

Shimano: 2.5 mm
SRAM: 3 mm
Magura: 2.5 mm
Campagnolo: Check the wear indicator

Always follow the specifications for your brake system.

Step-by-step guide

The following five steps will show you exactly what you need to pay attention to when changing bicycle disc brake pads.

STEP 1

Remove the old brake pads

First, remove the wheel from the side where you’re replacing the brake pads. The brake caliper is now accessible. Remove the retaining clip or cotter pin, then loosen and remove the pad retaining bolt. Slide the brake pads out of the caliper.

Expert tip: Check how the old pads are worn. Uneven wear can indicate that the brake pistons were not moving evenly.

Brake pistons are pressed back into the brake calliper using a brake piston reset tool

STEP 2

Prepare the brake pistons for replacement

Next, prepare the brake pistons for the new pads. Clean any dirt from the brake pistons and inside the caliper using brake cleaner and a clean cloth. Because new pads are thicker, the pistons will need to be pushed back into the caliper. Use a piston reset tool or a plastic tire lever to press them back evenly.

Our Expert Tip: The brake pistons can also be cleaned very easily with a cotton bud. After cleaning, you can treat the sides of the pistons with a little brake fluid using a new cotton bud. This makes the seals supple.

Close-up of the installation of the new brake pads

STEP 3

Install new brake pads

Insert the spring clip between the new brake pads and press them together. Slide the pad assembly into the correct position inside the brake caliper. Reinstall and tighten the retaining bolt, then secure it with the retaining clip or cotter pin.

Expert tip: Pay attention to pad orientation. Some pads are universal, while others are side-specific. Directional pads are clearly marked.

Reinstall the impeller and check the function

STEP 4

Reinstall the wheel and center the brake caliper

Reinstall the wheel and secure it properly. Spin the wheel and pull the brake lever to check that the caliper is centered. If you hear consistent rubbing while the wheel turns, readjust your disc brake.

Close-up of braking in the new brake pads

STEP 5

Bed in the new brake pads

Bed in your disc brakes. This ensures smooth operation and allows the new brake pads to deliver full braking performance.

Additional tips for replacing brake pads

Here are a few extra tips to keep in mind:

Check your brake pads regularly and replace them before they are completely worn out. Always follow the manufacturer’s instructions.
Clean the brake pistons and brake caliper thoroughly to help extend the life of your braking system.
Use brake pads that are compatible with your brake model and choose a pad compound that suits your riding style.
If the brake lever feels soft after installation, pump it several times. This helps restore proper lever feel if air has shifted inside the system.
A repair stand makes the job easier. You can also turn the bike upside down or rest it on the saddle. Keep in mind that this may temporarily affect brake feel. Pump the lever several times afterward to restore pressure.