Shimano Disc Brake Adapter (203mm Front) (IS Mount) - ISMMAF203SSA
Shimano Disc Brake Adapter (203mm Front) (IS Mount) - ISMMAF203SSA, This is the Shimano SM-MA Front 203mm S/S Disc Brake Mount Adapter. "51mm Caliper Mount" front, fits 203mm rotor to IS 6" mount.