FSA Bicycle Cycle Orbit C-40 ACB Diff Headtube 1.1/8 – 1.5 Inch Headset Black

For differential headtube OD headtube

For carbon fibre special steerer

Stack Height 8.5 + 0.9 = 8.9mm

Bottom 3645 ACB

Stainless crown race

Steerer : 1.1/8-1.5"

Brand Name : FSA

Top 4545 ACB

Upper : 41.8mm

Lower : 51.8mm