Trek Electra brand Bontrager brand Trek Travel
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  • Bontrager Headset Expander Plug and Top Cap
Bontrager Headset Expander Plug and Top Cap
Bontrager Headset Expander Plug and Top Cap

Bontrager Headset Expander Plug and Top Cap

Model W547432

Peace of mind for your carbon fibre steer tube.

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Genuine replacement parts

A safe and secure alternative to the traditional star nut for carbon fibre steer tubes.

This expander plug can be easily installed in all Trek 1-1/8" carbon fibre steer tubes.

Product details

  1. Approved for use on all Trek carbon fibre 1-1/8" steer tubes
  2. Always install one spacer above the stem on carbon fibre steer tubes
  3. Do not use on aluminium steer tubes in place of a traditional star nut
  4. Torque inner expander bolt to 9-10Nm
  5. Torque top cap bolt to 4Nm