I found this somewhere on the web

"In reply to wheel failure:
I have not heard of anyone with a Pantera having wheel failure. However, I
can tell you from first hand observation that it does happen.
I had pulled over to the side of the road and was waiting for someone. I was
standing next to my car looking back up the road and a Tahoe came across the
railroad tracks at a normal speed (45 to 50mph) on a public highway. The guy
pulled over and stopped his car, so I went over to see if I could help. I
was surprised to see that both front Boyd Coddington wheels had been bent
beyond belief just by going over a set of railroad tracks. Both tires went
flat. The poor guy had to be towed home as he only had one spare tire. He
was runing 35 series tires with 20 inch rims.
"