FSA Gravity 3 Tapered Steerer Headset: For 55mm OD headtube. 1.5" to 11/8" tapered steerer Upper bearing: 36&176;/45&176; ACB Alloy upper cup with Angular Contact Bearing (blue seal) Forged Cr-Mo lower cup with &216;1/8" &215; 30 caged ball bearings Stack
Height: 6.3 + 2.7 = 9mm Weight: 257g