Wolf Tooth Headset Upper Knock Block - 28.6, 8mm, Blue Mountain FatBike Cranksets 48mm = 143g

48mm = 143g

Three traditional back cycling pockets

Manufacturer Part Number: HWYABL00S2993S

HT6148 31992

Wolf Tooth Headset Upper Knock Block - 28.6, 8mm, Blue Mountain FatBike Cranksets 48mm = 143gWolf 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