Bontrager Headset Expander Plug and Top Cap is made for replacing or upgrading a bike part. It helps keep your bike working properly when an old part is worn, damaged or no longer suitable.

The main details to look at are Model: 1-1/8in Expander, Thickness: Not applicable, and Weight: 40g. These points help you quickly decide if this is the right choice for your bike, your fit, or the way you ride.

Key features

  • Good for: replacing or upgrading a bike part
  • Brand: Bontrager
  • Category: Headsets & Stems
  • Model: 1-1/8in Expander
  • Thickness: Not applicable
  • Weight: 40g
  • Feature: Approved for use on all Trek carbon fibre 1-1/8" steer tubes
  • Feature: Always install one spacer above the stem on carbon fibre steer tubes
  • Check before buying: Check the size, fitting standard and bike compatibility before ordering.