Trek Standard Headset Top Cap Bontrager Top Cap Black 27-inch x 1-1/4-inch E-Bike Integration: Includes magnet bracket

E-Bike Integration: Includes magnet bracket for Shimano STEPS speed sensor system

and other trail hazards

Straight-pull spokes add stiffness and strength while the Shimano HG-compatible freehub offers easy drivetrain compatibility

Compatible only with 1/8 inch drivetrains

Trek Standard Headset Top Cap Bontrager Top Cap Black 27-inch x 1-1/4-inch E-Bike Integration: Includes magnet bracketHeadset Part Trek Top Cap Standard 2018 Black Genuine replacement parts Value oriented replacement parts An industry standard star nut, top cap, and preload bolt, great for use on any fork with an aluminum or steel steer tube. The M4 hex preload bolt allows for checking torque of the full cockpit without changing bits on the torque wrench. Key Features Do not use star nut on carbon steers Top cap has a 33. 5mm diameter Specifications Color Black Size