These classic styled "Kung-Fu" Grips are made from Injection-molded Krayton synthetic rubber.
These grips are made from the same material used in dirt bike and BMX grips: Kraton Rubber. They are softer and more comfortable but also wear quicker. Just like a dirt bike, plan on changing them often, depending on how hard you ride and in what conditions.
Note: Using Biltwell rubber grips on Harleys will often require that your motorcycle is equipped with an aftermarket throttle tube. The grips do not have a built in plastic throttle tube, they are meant to slide over a higher-quality aluminum tube. The Biltwell 1" Whiskey Throttle Tube is perfect for these grips.
Note: These are 1" inner diameter grips.