FORMULA R1 HYDRAULIC DISC REAR BRAKE NEW / MSRP $269.99 / SHIPS IN 24 HOURS SPECIFICATIONS: Manufacturer: Formula Lever: R1 Caliper: R1 Line Length: See Title Mounts: Rear: Post mount 160mm, with 160mm I.S. to post mount adapter Mass: 235 grams (of everything) Pre-Bled Includes Pads Condition: New, not in retail packaging Includes ONLY that which is shown. If anything else is included, it is to be counted as extras, not obligatory inclusions. Please refer to the last image showing the flow chart to determine compatibility with your frame, fork, and rotor size. Essentially most calipers are compatible with any frame or fork, it's just a matter of brackets/adapters to push the caliper closer or farther away from the center of the wheel.