This forum is awesome!
Based on what I have read here, and particularly in this thread, I just put 4 new GY Endurance ST 225/75/15 Load range E on the TT.
Based on my curb weight and tire ratings I had them inflated to 75. Going to check the math on that later. I guesstimated approximately.
I have always appreciated the input of others based on personal experience here.
Found the date codes on the back of the old tires, 2407. Eek! 12 years old, original ones except one that was replaced with a mismatch in 2014.