The Verhüterli (preventer) makes its name and ensures the safe use of a carbon steerer. For safety reasons it is recommended to leave the carbon steerer about 3-9 mm are and use no claw. Instead, the headset/stem can be removed again with the Ahead Expander "GumGum" set and the head tube supernatant can be capped with a self-sustaining carbon cap (Verhüterli). The possibility of a longer steerer ensures reusability of the fork.
- head tube: 1 1/8 inch
- height: 11 mm
- functional principle: self clinching with rubber lip