Hope Brake Caliper Adapters. Features: For use with 2006+ Hope 74mm mounted calipers IS-front adapters fit both quick-release (QR) and thru-axle (TA) fork mounts with included spacers Fits front (F) and/or rear (R) applications: (IS) International-Standard; (PM) Post-Mount Specifications: Brake Caliper Mount Type: Post Mount (74mm) Mount | Rotor Size: Front IS | 200mm Rotor, Rear IS | 180mm Rotor