Shimano R203P/S Disc Brake Adaptor for 203mm Rotor 74mm Caliper 51mm Frame. Shimano Disc Brake Adaptors allow the use of different sized rotors to your frame or fork.
- TECH SPECS
| Brake Caliper Type | Post Mount |
| Weight | 21 |
| Mount | Rotor Size | Rear IS | 203 Rotor |