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...
I'd found out what the warranty is on the OEM tires. Id also keep a log & If you start seeing premature wear I'd call them & see if you can get a credit towards new tires. I did this with my first Raptor and was able to get ~75% covered towards upgraded Maxxis (15" wheels). Also as mentioned look underneath your rims should be stamped with info on it.