Flybikes Magneto CrMo Axle Front Hub material: 7075-T6 alloy hub-shell | 4130 heat-treated crmo female axle | heat treated chromoly bolts axle size: 15mm female axle with 3/8 inch axle bolts spoke holes: 36H bearings: * color: black additional information: Fly Magneto hubguard is sold separate and can be used both as a non-drive side and front hubguard