How to clean bike disc brakes
26 January 2025

How to clean bike disc brakes

How to clean bicycle disc brakes properly: what you need, 4 simple steps and a brake check. Tips from the official WD-40 dealer in Ukraine.

Most modern bicycles have disc brakes. Just like on a motorbike or a car, they need regular care: dirt, dust and grease on the rotors reduce braking power and wear the pads faster. Here is how to clean them in 15 minutes.

Cleaning bicycle disc brakes

What you need

  • WD-40 BIKE Degreaser
  • Clean lint-free rags
  • Bike repair stand (optional but handy)
  • A container to catch the excess product
  • Clean water
Important: never apply lubricant to brake rotors or pads, including WD-40 Multi-Use Product. Rotors need a degreaser that leaves no film.
Step 1

Prepare the area

Work outdoors or in a workshop. Put the bike on a stand or turn it upside down on the saddle and handlebars so the wheels spin freely. Place a container under the rotors.

Bike on a repair stand
Step 2

Apply the degreaser

Shake the can and spray the degreaser on both sides of the rotor. Let it work for a few seconds to dissolve grease, oil, dust and dirt.

Applying degreaser to a brake rotor
Step 3

Wipe and rinse

Wipe the rotor with a clean rag. If dirt remains, repeat step 2. Then rinse the rotor with clean water and dry it.

Clean bicycle brake rotor
Step 4

Test the brakes

Spin the wheels and squeeze the brake levers several times. Always test braking at low speed before riding.

What next

After the rotors, clean the chain with the same degreaser and lubricate it. After rides in forests, mountains or sand, check the bike, chain and rotors more often. To protect frame hardware, bolts and cables from moisture and rust, use WD-40 Multi-Use Product, but never on the brakes.

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