FSA Orbit ITA headset is designed to allow use of a tapered fork on a frame with a 1-1/8'' head tube. Fits a Zero Stack (44 mm ID/50 mm OD) head tube, with a stainless steel crown race.
Stack Height: (16.9mm/13.4mm=30.3mm)
Steerer Diameter: 1 1/8" headtube and 1 1/8" to 1.5" Tapered Fork
MFG. Part #: 101-1321A