Extralite UltraStar 4 Expander Plug
Article number: | 010-02-04 |
Availability: | In stock |
The Extralite UltraStar 4 is the lightest functional headset expander available—just ~4.7g (1 ⅛") or ~5.7g (1 ¼"). Precision-machined in Italy from aerospace-grade 7075-T6 aluminum, it replaces heavier star-fangled nuts to safely preload carbon or alloy steerers without internal damage.
Designed for 1 1/8" carbon steerers (22.1–25 mm ID), the Ultrastar 4 improves upon the previous generation with an updated sleeve profile for increased friction area and smoother installation. The low-profile top assembly integrates seamlessly with lightweight stems such as the Extralite HyperStem, maintaining clean aesthetics and perfect alignment.
Designed for riders who count every gram, this is the fourth-generation evolution of Extralite’s acclaimed UltraStar line—stronger, cleaner, and lighter than ever—hallmarks of Extralite’s Italian engineering.
1 - 1/8" | 1 - 1/4" | |
Weight | ~4.6g | ~5.6g |
Material | 7075-T6 Aluminum | |
Dimension | 22.8 mm - 25.2 mm | 25.0 mm - 27.2 mm |
Enhance your cockpit and headset setup with:
- Pair with the Extralite Headset for a fully integrated, ultralight steering assembly.
- For a perfect fit, match with the Fair Wheel Bikes Headset — precision-sealed.
- Combine with the Extralite HyperStem for a cohesive, Italian-engineered front end.
- Finish your cockpit with comfort and control using our full selection of Bar Tape & Grips.