TRP Disc Brake Adapters Description: Adapters to convert flat mount forks or frames to post mount for 140mm and 160mm rotors. Features: Forged aluminum adapters Sold in a variety of configurations to suit your bike setup Specifications: Flat Mount | 140/160mm Front: For 140mm or 160mm front rotors with flat mount caliper and flat mount fork interface. Reversible design Flat Mount | 160mm Rear: For 160mm rear rotors with flat mount caliper and flat mount frame interface FM Fork/PM Caliper | 140mm Front: For 140mm front rotors with post mount (74mm) caliper and flat mount fork interface FM Fork/PM Caliper | 160mm Front: For 160mm front rotors with post mount (74mm) caliper and flat mount fork interface FM Frame/PM Caliper | 140mm Rear: For 140mm rear rotors with post mount (74mm) caliper and flat mount frame interface FM Frame/PM Caliper | 160mm Rear: For 160mm rear rotors with post mount (74mm) caliper and flat mount frame interface Post Mount | +20mm: For adding +20mm to rotor size with post mount (74mm) caliper and post mount (74mm) frame/fork interface (140mm to 160mm or 160mm to 180mm) IS Mount | 160mm Front, 140mm Rear: For 160mm front rotors or 140mm rear rotors with post mount (74mm) caliper and IS mount (51mm) frame/fork interface IS Mount | 180mm Rear: For 180mm rear rotors with post mount (74mm) caliper and IS mount (51mm) frame interface IS Mount | 180mm Front, 160mm Rear: For 180mm front rotors or 160mm rear rotors with post mount (74mm) caliper and IS mount (51mm) frame/fork interface