The Slater 650 is made of 6061 aluminum, features a 31.8mm stem clamp, 20mm rise and tapers to 19mm ends to exclusively fit smaller grips, such as the Slater Jr. (Standard handlebars taper to a 22.2mm outer diameter) The Slater 650 provides ultimate control, comfort and performance, while increasing safety and fun at the same time. And because of the smaller diameter bars, the SDG 22.2 shim kit is required to mount cockpit controls, such as brake levers, shifters and even an SDG Tellis Dropper post.