TRP FR1 Disc Brake Adapter - Flat Mount Frame to Post Mount Adapt to anything. The TRP FR1 Disc Brake Adapter lets riders run their favorite post mount disc brake caliper on a flat mount-only frame, making it easier than ever to say "whatever!" to ever-changing frame standards, and run what you want. Designed to precise tolerances by TRP, this adapter is engineered for a secure fit and and compatibility with TRP and other post mount calipers. The FR1 adapter is a must-have for mechanics and cyclists needing flexibility across different frame standards. Features Flat mount to post mount enables the use of most post mount calipers on most flat mount frames Precision engineering for a secure fit Durable construction built for long-term reliability Includes mounting hardware for straightforward installation SPECIFICATIONSAdapter Type Flat mount frame to post mount caliper Compatibility For TRP and other standard post mount disc brake calipers Included Adapter, Bolts, Spacers Manufacturer Item Number ABAD000067 | Trp | Fr1 Disc Brake Adapter - Flat Mount Frame To Post Mount Rear, For 140Mm Rotor, With M5 X 17Mm Bolts