The way I do it is cut accross it with a sawzall. You have to cut through part of the rim to get all the way throught the outter edge. Then lay the tire down flat and have someone with a car or truck roll over the edge of the tire to break the bead. If you cant get access to someone with a car. You have to cut all the way around the edge with a sawzall as clost to the rim as you can get on both sides. The tire will fall off. The bead will still be stuck to the rim. You can use a hammer and chisel or pry bar to break the bead.