1. Remove your cassette. Cassette removal tools are sold separately.
  2. Mount the non-drive side first. The non-drive side cover has the valve stem clearance hole cut out of it.
  3. Align the valve stem with the clearance hole in the left side cover. Use masking tape to temporarily hold the cover in place on the wheel (a second pair of hands can also be helpful).
  4. Mount the drive-side cover next. Make sure to align the Wheelbuilder "Align Valve Stem Here” decal with the valve stem clearance hole on the left side cover. You should be able to read the decal through the valve stem clearance hole.
  5. Align the mounting holes and begin pushing the fasteners through one at a time. DO NOT TIGHTEN the fasteners completely at this point.
  6. After all fasteners have been installed begin tightening them in two or three stages until they are completely tight. Fasteners are made to “push-lock” by hand and must be completely bottomed-out for maximum security. If necessary, use 2 coins in the slotted heads to tighten the fasteners completely. Some covers may include more than one length fastener -- use the longest length first and evaluate cover tightness before trying a shorter length.
  7. Reinstall your cassette and install the wheel on your bicycle.
  8. Be sure to check your derailleur clearance in the largest rear ring (granny gear). If your derailleur slightly overshoots the largest cog on the rear cassette it may cause interference between the covers and the derailleur. This is a common problem and can be easily solved by adjusting the derailleur limit screws. Have a qualified mechanic do this for you if you are not familiar with derailleur adjustment procedures.

Additional Notes: PLEASE READ

  • Disc covers are not intended for continuous training use. Remove covers between races.
  • DO NOT use Loctite on fasteners. Loctite will disintegrate the cover material and cause fasteners to pull through.