Headset Part Trek Top Cap Expander 1-1/8" 2018 Black

Genuine replacement parts

Peace of mind for your carbon fiber steer tube.

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.

Key Features

• 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

Specifications