Hey hey! I´ve been looking and looking, and I can´t seem to find the speed ratings for the RS-50! I bought a SR-50 (Scooter Class), but it goes 20MPH up hill (MUCH to my dis-may), so I´m returning it, and thinking of getting a RS-50, but first I need to know, can it do about 50 up hill? Or at least a solid 30-40? Thank you! ^_~v