Replace Disc Brake Pads

Steps

1. Remove the Wheel: Remove the wheel associated with the brake you are servicing.
2. Remove Pad Retainer: Locate the pin or bolt holding the pads in place. If it's a cotter pin, straighten it with pliers and slide it out. If it's a threaded bolt, use the appropriate hex key.
3. Extract Old Pads: Slide the old pads and the metal spring out of the caliper. They should pull out easily from the top or bottom of the caliper.
4. Clean the Caliper: Use isopropyl alcohol and a clean rag to wipe any brake dust or grime from the inside of the caliper. Do not pull the brake lever while the pads are out!
5. Reset the Pistons: Use a piston press or a plastic tire lever to gently push the brake pistons back into the caliper body. This creates space for the new, thicker pads.
6. Install New Pads: Place the new pads into the metal spring "sandwich" and slide the assembly into the caliper. Ensure the braking surface (the rough side) faces the rotor.
7. Secure the Pads: Reinstall the pad retainer pin or bolt. If using a cotter pin, bend the ends back to secure it.
8. Reinstall Wheel and Bed-In: Put the wheel back on. Pump the brake lever a few times to seat the pads against the rotor. You must perform a "bed-in" procedure (repeatedly slowing down from moderate speed) to ensure full stopping power and prevent squealing.

Tips

• Never touch the braking surface of the pads or the rotor with your bare fingers. Oil from your skin can contaminate the pads and cause noise or reduced power.
• If your brakes feel "mushy" even with new pads, you might need to bleed the hydraulic system.
• Check your pads monthly. If the friction material is thinner than a dime (about 1.5mm), it's time for a refresh.