I've heard that the wheel adapters aren't the best way to mount wheels to a drum. Its kinda a weak point, but then again, a lot of people use them or have used them for 1,000s of miles. I think you rubbing might be more of an issue on the front end. The backs would probably be ok if you didn't go too wide. The fronts are more likely to rub. Perhaps you should post up what size tires and wheels you are considering.
