Forbidden Motorcycles risers feature a 1-1/8" clamping area for MX style bars. They come in 9" and 11" heights and raw or black anodized finishes. The top clamp is a one-piece construction for extreme stability and durability. The FM logo is machined into the T 6061 aluminum. The motorcycle handlebar risers are pre-drilled for internal wiring for a super clean assembly, we also offer Forbidden Motorcycle bars and FM moto bars by Fly Racing with 1" ends for HD controls and pre-drilled holes for internal wiring to bolt directly onto these risers!