Mark, you likely need new rims ! That kind of damage usually is the result of a rim that's rusted or worn to a razor edge on the clinch, which eventually saws through the clincher bead on the tire.
Thanks Mark, i was just going to put those pics up. The tire my rim destroyed was only a few years old, so definitely check them out when you replace the tire. Its also a good idea to make sure you run with the tires inflated properly to reduce the risk of them moving back and forth on the rim.
This was a rim and tire that was on the car when I bought it. I have rebuilt two of them and changed out the tires ... this was one I hadn't gotten to yet. I just had them on there to roll the chassis around while I was working on everything else. This blow out happened a day after I pumped it up to 55 lbs. I was laying under the car adjusting the body mounting bolts and ... BANG ! I could feel the explosion and my ears were ringing for a few minutes afterwards. Had no idea what it was and initially thought it was gas related. Just bought four new tires ... just in time to wrestle with them as the cold weather starts to settle in here in Rochester. :-)
You did well Mark. Some folks get rid of tires before they get all the use out of them.