FSA Bicycle Cycle Bike Orbit CF-40 ACB Diff OD Headtube 1.1/8 1.5 Inch Carbon

4545 ACB upper industrial bearing lower (for carbon fibre headtube), Differential headtube

Lower Industrial bearing, Upper Angular Contact Bearings

Stack height: 9.4 + 0.9 = 10.3mm

For differential OD headtube

Steerer : 1.1/8-1.5"

Stainless crown race

Brand Name : FSA

Carbon top cover

Upper : 41.8mm

Lower : 51.8mm