Shimano R203P/S Disc Brake Adapter 2026 in Black size Is Rear - 203mm

evo.com | Shimano Brake Small Parts > If you need to install your post mount Shimano rear brake caliper to your ISO frame mount using a 203mm rotor, look no further than the Shimano R203P/S Disc Brake Adapter. This setup includes the mounting hardware. R = Rear Brake, 203 = Rotor Size, P/S = Post Mount Caliper, ISO Frame Mount. Includes Mounting Hardware For Post Mount 74mm Caliper On ISO Mount 51mm Frame, Using 203mm Rotor | Shimano R203P/S Disc Brake Adapter 2026 - IS Rear - 203mm in Black