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 risers are pre-drilled for internal wiring for a super clean assembly, we also offer 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!