Does anybody know how heavy and large an electric recumbent bike can be, before it is classed as a car? I want to design an electric car/bike, with three or four wheels, but I need to know what limits there are on weight and length, before even attempting it. If it's going to be classified as a car, then I am in new territory and I would presume it also needs to have crash tests and umpteen other criteria will need to be met by it.