XDR Freehub Body - GMR or TwentyFour II Series Rim Brake V2 Rear Hub

The XDR™ driver body is a universal mounting system for cassettes that incorporate cogs with fewer than 11 teeth. It allows for lighter and more versatile drivetrains without requiring new rear axle standards, cassette tools or hub redesigns.  XDR 12 spd Freehub body for a GMR or TwentyFour ii Series "Rim-Brake" rear wheel (12spd).