Sawzall works really well with the heavy steel blades. As for a simi tire I can break one down by hand before most people can cut the bead on them. But then again I worked at a truck stop for a few years. And the PB Blaster(better than wd 40) makes just a big fire ball as ether. We did have a cheeta that we used if it would hold air. But that was not often. My local yard used to use their loader to break the beads for me then a couple tire irons and I was in business. Now I'm too old and broken for that stuff. I use a saw and cut throught the beads and part way up side wall. Of corse my yard would let me through a few in their short steel pile with just taking a utility knife around the bead and leaving about 1/2 inch of rubber on. I can get by with about 15 or so per truck load