Orbit C-33 Headset IS42/28.6 | IS47/33 (NO.44E/CF)
The FSA Orbit C-33 is an integrated headset built for road, mountain, and urban commuting bikes that use a tapered steerer tube. It accepts 1-1/8 inch to 1-1/4 inch steerers and pairs with a 28.6mm threadless stem clamp, making it a straightforward option when replacing a worn headset or building up a new fork and frame combination.
Cartridge bearings support smooth steering across the IS42 upper standard, while a 33mm crown race locates the lower bearing precisely against the frame. Upper stack height measures 10.3mm and lower stack height 8.7mm, figures worth checking against your frame's headset tolerances before ordering. The NO.44E/CF designation identifies this specific configuration within FSA's Orbit lineup.
Quick Facts
| Feature | Specification |
|---|---|
| Headset type | Integrated headset |
| Steerer tube compatibility | 1-1/8" to 1-1/4" tapered steerer |
| Upper headset standard | IS42, 28.6mm threadless stem clamp |
| Crown race diameter | 33mm |
| Bearing type / stack heights | Cartridge bearings; upper 10.3mm, lower 8.7mm |
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Product images may vary slightly from final specifications.
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