Material: 6061-T6 Alloy Refined Hub-Shell Axle: 4130 Crmo Female Axle 12mm Thread Bolt With 14mm Extension Bearings: 3 High Quality Sealed Bearings Spokes: 36h Driver: 9t Only, Full Bushing Driver System, Ratchet Is Machined Into 1pc Driver For Maximum Strength Features: Unique 12mm Female Bolt System, Cnc Cones, Two Bearings On Non-Drive Side To Increase Hub Life, Switch Drive System, New One Piece Pawl and Spring System Measurements: Pcd 46/54mm : Flange Offset 27.7mm Weight: 477g