Good question? It's an interesting idea!
I did see one that was similar.. meaning the tire part was slightly thicker.. but not much.. I did a double take as I thought it was a car with just a rim. I was in line next to it in traffic.. I think the driver got a good laugh out of my reaction.
I have no idea! Time to look it up on Snopes.com. They usually have the answers for modern day true or false questions.