A top-spec reducer headset, the Orbit Z 1.5R features sealed angular contact bearings top and bottom, running in CNC machined internal alloy cups. The bearings take a 1-⅛" plain steerer, with an alloy top cover for a clean appearance.
1-⅛", 36°/45°s ACB
For 55mm OD head tube
For 1.5in sized head tube and 1-1/8in steerer
Alloy top cover
CNC machined alloy cups
Angular Contact Bearing (blue seal)
Stack Height 7.1+3.5=10.6mm
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