The Mankind Vision Cassette Hub is a solid cassette style hub built for strength, durability & a super-smooth roll. Built from 6061-T6 aluminium for the hub shell that's paired with a 14mm nickel chromoly hollow axle with 8mm inner hex. Two precision sealed bearings, a 1-piece 9 tooth chromoly driver with polymer bushings & plastic drive side & non-drive side hub guards included. section Product Specs HUB TYPE: Cassette AXLE: 14mm nickel chromoly hollow axle DRIVER: 9t DRIVE SIDE: Right Side Drive SPOKE HOLES: 36h WEIGHT: 469g (1.03lbs)