Because Ape Hangers are tall handlebars, extra clamping power at the risers is best. The leverage of the tall bars will allow the Ape Hangers to slip and rotate in the risers with a jolt, such as hitting a big bump, for instance. A one-piece handlebar riser clamp offers extra holding power, as there is more surface area of the riser contacting the handlebars. Once you have your bars at the angle you want, be sure to tighten down all the riser clamp bolts to ensure your handlebar won't slip.