Bontrager Expander Plug and Top Cap Headset ew-jc130-sm_di2_y-splitter_connector_wire while still allowing easy mounting

while still allowing easy mounting and dismounting from the open side

Whether you're installing a replacement shock or rebuilding your suspension setup

- Derailleur hanger & bearings NOT included (sold separately)

Bar End Mount sold separately for road bar integration

- Professional installation recommended if unsure

Bontrager Expander Plug and Top Cap Headset ew-jc130-sm_di2_y-splitter_connector_wire while still allowing easy mountingProtect your carbon steer tube the right way. The Bontrager Headset Expander Plug and Top Cap is the correct and recommended alternative to a traditional star nut for Trek carbon fibre steer tubes offering a secure, damage free installation that won't compromise the structural integrity of your fork. Unlike a star nut, which is hammered into place and can cause irreversible damage to a carbon steer tube, this expander plug uses a clamping mechanism