Internal headsets are available for 1 1/8”, 1 ¼”, 1.5”, and tapered steerer tubes. Internal headsets are sometimes referred to as Zero Stack (ZS) because both cup and bearing is housed entirely inside the headtube.
Orbit Z Ceramic
Internal headset (with cups) with ceramic angular contact bearings.
ZS-4
Internal headset (with cups) with ceramic angular contact bearings.
Orbit Z
Internal headset (with cups) with angular contact bearings.
Orbit Z-CF
Internal headset (with cups) with angular contact bearings.
Orbit Z-CX
Internal headset (with cups) with angular contact bearings.
Orbit ZS
Internal headset (with cups) with angular contact bearings.
Orbit ZS CF
Internal headset (with cups) with angular contact bearings.
Orbit Z-41CX
Internal headset (with cups) with angular contact bearings.
FSA 1
Internal headset (with cups) with ceramic angular contact bearings.
FSA DX
Internal headset (with cups) with ceramic angular contact bearings.
FSA SX
Internal headset (with cups) with ceramic angular contact bearings.
FSA SXE
Internal headset (with cups) with ceramic angular contact bearings.
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