1. Get the bike ready for maintenance. Turn off the bike, remove the battery, and press and hold the MODE or Power button to discharge any remaining power.
  2. Flip the bike upside down. Carefully put the bike in a repair stand or flip the bike upside down and rest the handlebar grips on props to protect the display.
  3. Remove the wheel. Set the skewer and hardware aside. 
  4. Remove the rotor. Use a Torx wrench or driver (typically T25) to carefully remove each of the six bolts. Ensure the bit is fully seated in the bolt head, press firmly, and turn slowly to avoid stripping the hardware. Recycle the old brake rotor according to local rules.

WARNING:

Do not touch the braking surface or the outer ring of the brake rotor that contacts the brake pads.  Instead, handle the replacement rotor with the inner rotor arms or with latex gloves. Touching the brake rotor or brake pads with bare skin can also transfer natural oils. Oils or other lubricants can decrease braking performance. We recommend wearing protective gloves when working near the braking system.



  1. Position the new rotor on the wheel hub. Make sure the new rotor is positioned with the directional arrow toward the front of the bike.
     
  2. Thread the new rotor bolts into the hub carefully by hand. Avoid cross-threading or damaging the threads. Use the Torx wrench or driver to tighten each bolt, stopping just before the bolt head contacts the rotor.
  3. Twist the rotor clockwise so it makes firm contact with the bolts. This will negate any potential shearing force exerted on the bolts in an extreme braking situation.
  4. Tighten the bolts evenly, moving from bolt to bolt in a star pattern. Torque each bolt to 7nm
  5. Reinstall the wheel. Carefully align the rotor between the brake pads and fully seat the axle in the frame's dropouts. Use caution to avoid damage to the brake pads. Ensure the wheel mounting hardware is properly and securely tightened. 
  6. Adjust the brake caliper in relation to the position of the new rotor (Centering the Caliper). How to Align a Hydraulic Disc Brake on a Bike
  7. Complete the bedding-in brakes procedure before your first ride. This process will evenly distribute brake pad material across the new braking surface of the rotor, will increase braking performance, and will help reduce brake noise. Bedding In a Disc Brake 


Please reference these articles to assist in removing your rear wheel.


Please also see this related article: Replacing Disc Brake Pads