Extralite UltraStar 4 Expander Plug

$36.49
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

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