Genuine replacement parts
A safe and secure alternative to the traditional star nut for carbon fiber steer tubes.
This expander plug can be easily installed in all Trek 1-1/8" carbon fiber steer tubes.
- Approved for use on all Trek carbon fiber 1-1/8" steer tubes
- Always install one spacer above the stem on carbon fiber steer tubes
- Do not use on aluminum steer tubes in place of a traditional star nut
- Torque inner expander bolt to 9-10Nm
- Torque top cap bolt to 4Nm