Headset will allow you to alter your top-tube length by +/- 5mm. Upper cup insertion depth: 9mm Lower cup insertion depth: 14mm Upper cup Stack height: 11mm - Total upper stack height including bearing cover: 15mm Lower cup Stack height: 14mm Upper Bearing: 41mm OD, 45 x 45 Degree AC sealed bearing Lower Bearing: 41mm OD, 45 x 45 Degree AC sealed bearing To suit standard 1 1/8'' forks. Proudly machined in the UK, anodised locally in black from 6082 T6 aluminium. Split type 7075-T6 aluminium crown race for simple, tool free installation Headset comes complete with top-cap (star-nut included), bearings and crown race - all parts required for fitment Attributes Bearing Grade ACB Sealed Headset Position Complete Headset Reach Adjustment 5mm Headset Type ZS, External threadless Headset Weight 140g Lower Cup 56mm Material 7075-T6 Aluminum Misc 5mm Primary Color Black S.H.I.S. EC44/28.6 | EC56/40 SHIS Lower EC56/40/H15 SHIS Upper EC44/28.6 Stack Height 15 Steerer Tube 1-1/8''-1.5'' Upper Cup 41mm
