Prime Doyenne 1-1/8"-1.5" Integrated Headset

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.

Features:

• Steerer Type: Tapered 1-1/8" to 1.5"
• Top Cap Material: Aluminium
• Top Cover Material: Aluminium
• Bearing Material: Steel Race with Steel Bearing
• Use: Road
• 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
• Stack Height: 8.7mm (without Crown Race)
• Top Cover Height: 8.2mm
• Weight: TBC