Motorcycle Handlebar Riser 22mm fit for Duke R 1290 Super ADV RST "Allow the rider to have a more comfortable riding posture, effectively reducing the fatigue of long-distance riding. lift extension adapter can better adjust the handlebar tilt" Just slide the stem extender onto the steerer tube and tighten it, very easy to fit. The handlebar height adapter is made of refined aluminum alloy, high toughness, no deformation, corrosion resistance, sturdy and durable.