Key Features:Durable and smooth front 105 disc rear hub,Designed for use with Center Lock Disc rotors for secure hassle free setup,Super quick engaging Freehub body with pawl engagement every 10 degree giving near instant power transfer,Excellent sealing performance through the use of low friction Labyrinth and contact seals, and an internal grease sleeve,Special Boron Nitride machining process is applied to the cones for super smooth rotation,Cold Forged aluminium hub shell with anodized finish,For 142 x 12 mm dropouts (axle not included),Designed for 11-speed road cassettes.