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Equipment > Components > Headsets > Road


This Cervelo headset was developed by FSA and TH industries for use the proprietary stem system used with the 2019-present S3 Rim / Disc framesets, as well as the S-Series Disc 2019-present. It is not to used with any other frameset and includes the specific set of component parts and bearings to replace the headset that came with the specified framesets.

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  • FSA IS2 headset for specific Cervelo S3/S-Series with ST29 proprietary stem assembly: 1-1/4" x 1-3/8”
  • Compatible with: S3 Rim/Disc (2019 - present), S-Series Disc (2019-present)
  • Includes upper and lower bearings, split ring, proprietary upper cap with spacer tab post, washers
  • Bearings are not the same- 1¼" 45°x45°, / 1⅜" 36°x45°
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