The HSF Stem Cap allows the Profile Design HSF/Aeria bottle to be fitted to our standard 1/Seventeen stem.

The HSF Aeria bottle smoothes airflow onto the frame, offering the chance to lower aero drag while increasing hydration carrying capacity. To this point it has required a specific stem – the new HSF Stem cap increases the options for access to the HSF Aeria technology.


The HSF Stem cap is only compatible with the 1/Seventeen stem (not the 1/Seven) and the HSF Aeria bottle. It is recommended to be used with stem lengths of 90mm and above in order to avoid interference with the front brake.


Material 3-D Forged 6061-T6 Aluminum
Clamp Diameter 31.8mm
Bar Clamp Torque 5-6Nm
Clip Bolt (Front) 2Nm
Clip Bolt (Rear) 2Nm
Finish Matte Black with Black Accents
Weight 40g


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