Mount Zoom Logo Mount Zoom Racing Lighter, Faster Products


Removable headset expander, practical and very lightweight.

Includes carbon assembly paste & optional red aluminum headset bolt.

Compatible with 1 1/ 8th steerers + offers good protection for carbon steerers versus traditional star nuts).

Compatibility range: Steerer inner diameter: 23.5 – 25.8 mm

Weight: 11g
Material: Aluminium 7075 T6

Simple to fit.
1. Clean & dry the inside of steerer. Add a small squirt of carbon assembly paste & rub around. Use a 8mm allen key to tighten the expander in the steerer tube to a maximum of 15NM (Alu/steel steerer tube) or 8NM (in a carbon steerer tube).
2. When you put your top cap on don’t tighten more than 4NM

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