Here's a couple of pictures of a bead breaker I cobbled up today. I didnt want to buy one (partly no room for more tools, partly lack of funds!) so I looked around the internet for pictures of home made ones.
A lot of motor-cycle guys make them out of 2x4's attached to a stud in there garages. I almost did this, until I had the thought of anchoring the thing to the reciever hitch on my truck. A couple of pieces of steel, one lttle weld, and 30 minutes later I had both rear tires from the lawn rangerbroken free of the rims. (I just want to pop the beads to paint the wheels - with the shape these 45 year old tires are in, Im sure I'll destroy them if I try to dismount them completely).



The "lever" is a piece of 1 1/2 x 3/8 thick steel flat bar, the "ram" is a piece of 3/4" square steel tube, with a 1/4" thick foot welded to it. The ram pivots on the lever on a 5/16 bolt, the lever pivots on the tow ball reciever on a 1/2" bolt
It works great, much easier than wrestling with squeezing a tire in a vice!