Works Components 2.0 Degree EC44-ZS56 Angle Headset

Fits headtube internal diameter: Upper - 44mm: EC44 Fits headtube internal diameter: Lower - 56mm: ZS56 Upper cup is external (EC) - will fit frames using ZS44 (ZS) upper headcup as standard. Upper cup insertion depth: 9mm Lower cup insertion depth: 11.5mm Upper cup Stack height ...Fits headtube internal diameter: Upper - 44mm: EC44 Fits headtube internal diameter: Lower - 56mm: ZS56 Upper cup is external (EC) - will fit frames using ZS44 (ZS) upper headcup as standard. Upper cup insertion depth: 9mm Lower cup insertion depth: 11.5mm Upper cup Stack height: 11mm - Total upper stack height including bearing cover: 16mm Lower cup Stack height: 2.5mm Upper Bearing: 41mm OD, 45 x 45 Degree AC sealed bearing Lower Bearing: 52mm OD, 45 x 45 Degree AC sealed bearing To suit tapered forks.

Split type 7075-T6 aluminium crown race for simple, tool free installation"