SRAM Avid Disc Post Mount Spacer Set:

Avid disc caliper spacer set. Doing away with brake adaptor brackets, this spacer kit will allow you to run different sized rotors on your post mount disc brake setup, and includes the proper hardware for mounting both CPS and Standard style Avid brand brakes.

• Includes stainless caliper mounting bolts (CPS and Standard)

Please Note:
10 S (Front 170) will fit 170mm Front Rotors
20 S makes native 160 post mount frame or fork work with 180 rotors