FSA Orbit Z 1.5R

1-1/8'', 36°/45° ACB For 55 mm OD head tube For 1.5'' head tube and 1-1/8'' steerer Alloy top cover CNC-machined alloy cups Angular contact bearing (blue seal) Stack height: 7.1 mm + 3.5 mm = 10.6 mm Weight: 140 g Attributes Bearing Grade ACB Sealed Crown Race Diameter 30mm Lower Cup 49mm Headset Type ZeroStack Upper Cup 49mm Headset Weight 140g Misc 36°/45° ACB (blue seal) Material Aluminum Primary Color Black S.H.I.S. ZS49/28.6 | ZS49/30 Steerer Tube 1-1/8'' Stack Height 10.6 Headset Position Complete SHIS Upper ZS49/28.6 SHIS Lower ZS49/30