Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. Its heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. – Fits many Shimano / Japanese front hubs – Type: Solid Axle – Threads: 9mm x 1 – Diameter: 9mm – Length: 155mm – 1 axle per bag