Prime's mission is to make your ride better, which is why the Doyenne Integrated Headset ensures smooth steering for many miles in all conditions, thanks to its superior reliability, quality and performance.
The Doyenne Headset features highly polished angular contact bearings to ensure smoothness, and the top cap is CNC machined from 6061 alloy and sealed to keep moisture away from the bearings.
To protect the lower bearings, Prime has included a CNC-machined 7075 alloy crown race.
Steerer Type: Tapered 1-1/8" to 1.5"
Top Cap Material: Aluminium
Top Cover Material: Aluminium
Bearing Material: Steel Race with Steel Bearing
Upper Bearing: IS41.8/28.6, 8mm H x 41.8mm OD x 45x45deg
Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg