You'll need three "tire irons" to pry your tire off the rim. One of mine is an official tire iron on the end of an old lug wrench. The other two are stainless steel bars that came off the broken mast of the free yacht.
Make sure the ends don't have sharp corners or edges. You don't want to poke holes in your inner tube while putting it back in. That would make the job into something from Greek legend hell!