I built a cheap bead breaker out of a 2x8. It worked great. I know some of you will say the guy at the garage will do it for $4-5 apiece but I decided to do it this way. If you don't like go to the next post. I cut the 2x8s so the box was just a little wider than the rim. I screwed in the corner gussets so I could catch as much of the tire are possible. I had a piece of heavy metal stock inside the rim, ran the chain around that and around the top of the port-a-power. Two if the tires were really old and stuck to the rims, I couldn't break them just by hammering on them. After I broke the bead I was able to pry two better tires off with a couple of big screwdrivers. The old, dried out tires I used sawsall to cut the beads and straight through the tread. As for pushing power you could rig up a bumper jack or a floor jack, I just happen to have an old port-a-power that I bought cheap years ago.