The Jumper will give you the confidence to do that jump, close that gap, and finish that last sprint! The Jumper is a strong handlebar stem to keep the control over every ride. Suited for 35mm handlebars, 0 MTB stem. Certified to use on all types of bikes including MTB and E-bike. Stiff 3D forged construction for optimal bike handling. Black stainless-steel bolts.