You need the adapters. I forget the part # but you can find it on the site. I used them on my speedmaster, but i gotta tell you i felt the quality was garbage. the rubber turned hard and glazed looking and cracked and the chrome looked lik chrome paint. Plus the metal underneath the chrome wasn't smooth so a ton of machining marks showed thru it. Some seem to think they are good, and i have no idea why such a wide range of opinions in quality. But you might want to check some out first b4 buying. You can usually find a lot of kuryakyn stuff at harley dealers if u wanna check it out first.