Favoritebikes Help Center

How to Replace Bicycle Disc Brake Pads

Replacing worn-out disc brake pads is essential for maintaining optimal braking performance and safety on your bike. Here's a comprehensive guide:

Buy compatible brake pad:

Purchase brake pads (ensure you check the diameter of your brake rotor and select the same size).

Tools You'll Need: 

  • Allen wrenches 
  • Flathead screwdriver 
  • Pad spreader tool or tire lever (optional, to push back pistons)
  • Clean rags
  • Isopropyl alcohol (optional, for cleaning)

Step-by-Step Guide:

  1. Prepare the Bike:

    • Place your bike on a repair stand or turn it upside down.
    • Remove the wheel with the brake pads you want to replace.
  2. Remove the Old Pads:

    • Locate the retaining pin or clip that holds the pads in place. It's usually on the top or back of the caliper.
    • Use the appropriate tool (Allen wrench or flathead screwdriver) to remove the pin or clip.
    • Slide or pull out the old pads, along with any retaining springs.
  3. Reset the Pistons:

    • Before installing new pads, you need to push the pistons back into the caliper to create space for the thicker new pads.
    • Use a pad spreader tool or a flat tire lever to gently and evenly push the pistons back. Be careful not to damage the pistons or seals.
    • If you accidentally squeezed the brake lever with the wheel removed, the pistons will be extended further, and you'll need to push them back before proceeding.
  4. Clean the Caliper (Optional):

    • If the caliper is dirty, you can clean it with a rag and isopropyl alcohol. Be careful not to get any cleaner on the rotor.
  5. Install the New Pads:

    • Insert the new pads into the caliper, ensuring they are correctly oriented. Refer to the brake manufacturer's instructions if you're unsure.
    • Make sure any retaining springs are properly installed.
    • Replace the retaining pin or clip.
  6. Reinstall the Wheel:

    • Reinstall the wheel, ensuring it's secure and the rotor spins freely without rubbing against the pads.
  7. Bed in the Pads:

    • Perform several moderately hard stops from a safe speed to help bed in the new pads. This will transfer a thin layer of pad material to the rotor, improving braking performance.

Important Tips:

  • Wear gloves to avoid contaminating the new pads with oil from your skin.
  • Avoid touching the braking surface of the new pads.
  • If the pistons are difficult to push back, it might indicate a problem with the brake system, and you should consult a bike mechanic.
  • If you experience brake rub after installation, try realigning the caliper.