The Inset TM 3 is designed to fit a 1 1/8" to 1.5" tapered steerer tubed fork & a 44mm to 49mm internal diameter tapered headtube on the bike. Supplied with an all-new bearing cap design, the Grip Lock™ is a multi-piece bearing cap that utilizes a precision controlled split ring that improves steerer tube interface. Aluminum cups in 10 available colors house our legendary bearings; all made in-house in our Portl&, Oregon facility. In Set™ is the unrivaled upgrade for all riding styles. Check out the Chris King Size chart Click here to enlarge.