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 IS Mount adapters are not compatible with Hope Mono6 or Moto Brakes Specifications: Frame Mount Options: IS Mount (International Standard, 51mm), Post Mount (74mm) Caliper Mount: Post Mount (74mm) Color: Black Weight: 20g (Approx.)