Forbidden Motorcycles risers feature a 1-1/8in. clamping area for MX style bars. They come in 9in. and 11in. 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 T6061 aluminum. The risers are pre-drilled for internal wiring for a super clean assembly, we also offer FM moto bars by Fly Racing with 1in. ends for HD controls and pre-drilled holes for internal wiring to bolt directly onto these risers!.