Thunder Risers - Polished This one-piece, investment-cast handlebar riser evolved from builder demand for a stiffer unit, and one that offers a greater surface area and clamping power on tall handlebars. Technical Details Investment-cast stainless-steel construction with raised Biltwell wordmark detailing One-piece bottom clamp design features threaded mounting holes on 3.5-inch centers to fit most stock and select aftermarket H-D trees Large one-piece bar clamp generates more clamping power against 1-inch O.D. bars—great for apes and other tall bar styles 2-inch rise from mounting base to centerline of the handlebar clamp Polished raw or black electroplated finishes available Accepts stock H-D or aftermarket 1/2-13 t.p.i. mounting hardware Bar clamps feature 5/16-18 t.p.i. stainless-steel Allen cap screws
