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Shimano Disc Brake Adaptors allow the use of different sized rotors to your frame or fork.
Shimano XTR R180P/S Disc Brake Adaptor 180mm Rotor 74mm Caliper 51mm Frame
$20.00 USD
| Brake Caliper Type | Post Mount |
| Mount | Rotor Size | Rear IS | 180 Rotor |