Come on Guys, I broken tires down in the drive, I can do it with 2 large screwdrivers, Just got to get that "Bead", Broke, then you keep it towards the inside of the shallow part of the rim, ya kind of "button hole" the rim out of the tire, a little at a time, the hardest part is getting the darned thing to stay still , but if that's a "problem", tighten your axel in a vise and slide the tire and wheel down over it, some times you can break the bead with your fingers, pintching the sidewalls, most the time just a little prying persuation, with some spoons or large screwdrivers, being carefull not to damage the seal or the sidewalls, some times some dish soap will aid in slicking things up, and aid in putting on the new tire, good luck, and save a buck.
dave