- A complete top cap assembly comprising of star nut, bolt, and carbon top cap for 1-1/8 inch diameter steerer tubes
- A-Headset top cap is made from UD carbon fibre, making it lightweight
- Star nut grips firmly inside the steerer tube when tightened
- Comes complete with star nut to fit 1-1/8 inch steerers (28.6 mm)
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