I just finished up running spokes for our 17" Rimbands. We designed these wheels to be a little heavier duty than our 18" front wheels we use on our Pro Fuel style bikes. These 17" wheels are for bikes that are larger in size and weight like the Nitro Funny bikes or Pro Mod / Funny bike applications. They accept the same PMFR style hub in single disc and will convert to a dual disc application using our dual disc adapter. JV