Total Tech V2 Cassette Hub material: CNC 6061T Alloy shell style: RHD (right-hand drive) / LHD (left-hand drive) compatible axle size: 14mm female axle with 3/8 inch axle bolts driver: 9 teeth | 1-piece | 4 pawls | using shim system spoke holes: 36H bearings: precision sealed bearings color: black additional information: driver side flange 60.5mmØ non driver side Flange 54mmØ