Stretched tires or not, potholes fuck up rims every day, putting tires that are too wide for your rims is just as dangerous and less practical when running larger than OE wheels on a car. If you don't want to curb your wheels, don't lay them down on the face like a retard, and don't hit curbs. Its not hard. There a price to pay when you modify your car regardless of what you do to modify it. You can have an 11 second street car with a 4 puck carbon clutch, and traffic jams are going to suck ass. You can have a vw with bags and $3000 mercedes wheels, but if you change lanes over a reflector you'll knock off your oil pan.