well, we made it down. Still have to make it back. I didn't order any new tires yet. I had the already jacked up spare, and the two tires a friend gave me mounted on rims.
I checked tires that morning before we left, 40psi. Well shoot no wonder the went went all crazy. They do show some dry rot. Aired up to 75, loaded our crap, stopped and picked up a couple other horses in the state.
Crossing my fingers, the old cracked GY Workhorse's load range E made a 1100 mile trip with about 12,000lbs. I noticed across Mississippi and Louisiana the roads were littered with blow out pieces.