CRUPI offers a headset designed and developed for integrated 1" steerer head tube on 1" steerer fork. It has annular bearings as well as a sealed cover and an aluminum star.
FEATURES :
• SHIS: IS38/25.4 | IS38/26
• Angular contact bearings 36° x 45°
• Sealed annular bearings
• CNC machined Aluminum 6061 cover and compression star
• Weight: 80g
• Sold with spacers
COMPATIBILITY:
• Fits 1" integrated head tube frames
• Fits 1" Steerer forks
| Headset Types | Integrated - IS | 
| Steer Tube Diameter | 1" | 
| Upper Outer Diameter | 38mm | 
| Lower Outer Diameter | 38mm | 
| Upper Inner Diameter | 1" (25,4 mm) | 
| Lower Inner Diameter | 1" (26,0 mm) |