April 20, 2020

PEOPLE FOR BIKES LINK

https://peopleforbikes.org/federal-e-bike-rulemaking/

BEDDING BRAKES

What is bedding a brake?

  • Anytime you install new brake rotors, brake pads, or both, it’s advantageous to bed in your new brakes. Bedding in your brakes is just an industry term to explain breaking in your new brakes. Bedding in your brakes helps transfer an even layer of brake pad material onto the brake rotor which assists in smoother brake operation and improved braking power.
  • Having a uniform layer of pad material on the brake rotor is essential to minimizing brake squeal and vibration.

Process

  • Dealers assembling bicycles from original boxes should follow this process
    • 15-20 rounds of light braking on PAS level 1
      • Do not stop completely during this process, ride from PAS level 1 top speed of 8mph and brake to about 2-3 mph each time
    • Give about 5-10 seconds in-between each stop to let the brakes cool down

PROBLEM BRAKES

Process Fix 1

  • Make sure not to touch rotors or pads with your hands during this process
  • Spray isopropyl alcohol onto a new rag and clean both front and rear rotors evenly on both sides
    • Carefully spin the wheel and have the rag pressed on both sides off the rotor
  • Remove front and rear wheels and use the isopropyl alcohol and a new section of the rag to clean the pads
    • You may also remove the pads and clean them off the bike if this is easier
  • Reinstall front and rear wheels
  • Repeat the bed in process described above

Process Fix 2

For really noisy / grinding brakes follow this process

  • Make sure not to touch rotors or pads with your hands during this process
  • Spray isopropyl alcohol onto a new rag and clean both front and rear rotors evenly on both sides
    • Carefully spin the wheel and have the rag pressed on both sides off the rotor
  • Uninstall the front and rear wheel and remove the brake pads from the bike
  • Rub the pads on 400 grit sandpaper with isopropyl alcohol. Do this until you can see the pad material become even without lines
  • Use Swiss Stop Disc Brake Silencer (or another brand of brake silencer) and spray material onto the freshly cleaned pads and rotors
  • Reinstall components and front and rear wheels
  • Repeat the bed in process described above
    • Braking power is significantly reduced after spraying on the disc brake silencer, please take special care not to go too fast during the beginning of the bed in process to avoid crashing!

VIDEO + MATERIAL RESOURCES

Video showed in Update

Ask a Mechanic: Bedding In New Disc Brake Pads – Art’s Cyclery

Bedding In a Disc Brake – Tech Tuesday #106

Swiss Stop Silencer