Wolf Tooth Headset Upper Knock Block - 28.6, 8mm, Blue Axle Pegs - Not compatible with all

- Not compatible with all TRP brakes

and YT Capra

- For installation of BSA bottom brackets

Cannondale One graphic adds a subtle touch of detail

Manufacturer Part Number: 49370887002

Wolf Tooth Headset Upper Knock Block - 28.6, 8mm, Blue Axle Pegs - Not compatible with allWolf Tooth Precision Headsets for Trek Knock Block are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. Available in a variety of colors to add some style to your bike. These upper headsets are for Trek frames with molded in internal bearing cups. Designed to work with Trek's Knock Block system The top cap on these headsets have unique raised features that key to Knock Block compatible stems