My TH is 2 months old now with OE "BlowMax" tires. I've put approximately 3,000 miles on them. I keep them aired to the 85 psi rating and check them often. I've very careful not to scrub or c...
If it was my RV, I'd change them NOW. In fact we still have the brand new Carlisles that came on our first hardsided TT, they made great tree swings for the kids.