Alot of Motorcycle Tunes customers mount the speakers on the handlebars, just inside of the windshield. The bottom mounting bolt and the clamps, allow versatile mounting locations. Customers even mount the speakers on the crashbars, forks, and spotlight bars. The bottom mounting bolt is a 3/8" bolt, we even have alot of customers who don''t use the clamps at all, and fabricate their own mounting solutions