Attachment Type: 140mm rear post mount, 160mm front post mount
Compatibility: [10mm] 10S fits 170mm Front Rotors, [20mm] 20S/20P fits 180mm Front and 160mm Rear Rotors, [30mm] 40P fits 170mm Rear Rotors, [40mm] 30P fits 200mm Front and 180mm Rear Rotors
Manufacturer Warranty: 2 years
Finagle your mismatched brake rotors and post mounts into a coherent speed-regulating package with the Avid Post Mount Brake Adapters. Just find your rotor size and fork/frame interface, then pick the adapter kit that's right for your current setup. Easy peasy.
Avid Post Mount Brake Adapter B00F5I3P5E