FSA Orbit 1.5 ZS Headset

For tapered zero stack head tube with 1 1/8" steerer tube.

Upper Headtube 44mm ID
Lower Headtube 56mm ID
For 11/8" steerer
Features:

Forged alloy upper cup with Angualr Contact Bearing
Lower CNC machined alloy cup with Angualr Contat Bearing
Spares:
Upper Bearing: 160-6460
Lower Bearing: 160-6740
Crown Race: H6079