Aluminium hub for bicycle Rear wheel 370 nondisc TRACK 20 holes, silver polished Width: 100mm / Ø9mm.Specifications:- Product Type: 370- Field Of Application: Track- Material: Aluminum- Net Weight [G]: 270.500Brake & Freehub System:- Brake Interface: Non discDimensions:- Axle System: 9 mm Thru bolt- Built-In Dimension: 100 mm- Hole Count: 20- Bore Type: Round