Chris king inset 5 headset inset is the latest addition to the chris king174 nothreadset family. Inset is a low stack threadless headset designed for use with contemporary frames featuring what would traditionally be called oversized headtubes.as times have changed, so have the specifications of many of the greatest bicycle designs. These new large headtubes allow frame manufacturer's greater surface area on which to attach top tubes and downtubes with the overall result being improved frame strength and rigidity. We pride ourselves on adapting chris' forward thinking original modular designs into ever evolving configurations to meet most new bicycle designs. The chris king174 inset now brings king's legendary bearing quality and time tested durability to even more bicycle models. Griplock bearing cap our inset headsets feature an all new bearing cap design. Griplock is a multi piece bearing cap that utilizes a split ring that improves steerer tube interface. For tapered 1 1 8 to 1.5 steerer tubes but can be used with 1 1 8 steerer tubes by purchasing a devolution 1.5 to 1 1 8 baseplate crown race. Features steerer tube od 8211 1 1 8 to 1.5 tapered upper headtube id 8211 49.61mm lower headtube id 8211 49.61mm upper headtube ream depth 8211 16mm lower headtube ream depth 8211 20mm fork crown seat od 8211 39.8mm upper stack height 8211 8.0mm lower stack height 8211 4.0mm weight 8211 150g buy chris king components from chain reaction cycles, the world's largest online bike store.