I guess it would mainly be for launch in a drag race situation. I have 8 paddle haulers on 8" rims   ,9 paddle extremes on 10" rims, and 8 paddle haulers on 10" rims. Was wondering which would be the best to start with. For some reason I think the 9 paddle extremes would be best. But wasnt sure if the 8" wheel on the hauler would be better even though it has one less paddle on it.