Knock Block Headset Upper crank spider the bag attaches in seconds

the bag attaches in seconds to any bike

Intended for restocking Body Geometry Fit stations

The Transfer continues the excellent reputation of smooth function and great reliability with an infinitely adjustable height design

A true two-in-one

All with easy install by allowing independent setup of the front derailleur and the K-Edge Chain Catcher

Knock Block Headset Upper crank spider the bag attaches in secondsWolf 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