The reason for the Foyt mention, now don't quote me on this, as it has not been confirmed, but early in kart racing, there was a lack of dirt tires for kart racing, so AJ went to Firestone and paid for the molds, the tires were, you guessed it, Firestone 500's, till karts beat his time at the short lived dirt track at IRP. I once had a few of them, but like everything else, I needed something worse so they went. He went and got the molds. Now, only he knows the validity of this post, I'm just putting it out there for review.