Ritchey WCS Upper Headset Assembly

Drop in upper assembly with top cap, starnut and cap for 1-1/8" steerer. 45/45 degree angular contact bearing Press Fit Upper Headset Assembly ZS44 Titanium coated for corrosion resistance For 44mm ID headtube Stack Height: 7.3mm Alloy Upper Fit (S.H.I.S.): IS42/28.6 Bearing: Sealed cartridge (ACB) - Ti coated Drop In Integrated Upper Headset Assembly IS42/28.6  Titanium coated for corrosion resistance Color: Black S.H.I.S. Stem Clamp Diameter: 28.6 Threadless Bearing Type: Cartridge , Sealed Bearing Defined Color List: Black S.H.I.S Upper: IS42 Drop In Integrated Upper Headset Assembly IS41/28.6  Titanium coated for corrosion resistance Color: Black S.H.I.S. Stem Clamp Diameter: 28.6 Threadless Bearing Type: Cartridge , Sealed Bearing Defined Color List: Black S.H.I.S Upper: IS41