FSA Gravity 1 Tapered Steerer Headset: For 55mm OD headtube. 1.5" to 11/8" tapered steerer Upper bearing: 36&176;/45&176; ACB Lower: &216;7/32" caged ball bearings Alloy upper cup with Angular Contact Bearing (blue seal) CNC machined lower cup with &216;7/32" &215; 20 caged ball bearings Stack
Height: 6.3 + 11.7 = 18mm Weight: 151g