The Pro 1 1/8" Gap Cap and Star Nut for Alloy Steerers is only for use on non Carbon steerer tubes. Using a star nut on carbon fiber may cause damage or failure. The "UD Carbon" version of this top cap is a weight saving upgrade but is not to be paired with carbon steerer tubes.
- UD Carbon cap
- For 1 1/8 steerer
- Lightweight anodized alloy bolt
- Lightweight alloy starnut