I purchased this 2022 Ram 2500 crew cab diesel 4×4 in June of 2023. The truck was purchased brand new with only 8 miles on it. The truck had the original M — Firestone Transforce HT LT275 70 R18 tires. The truck has 9500 miles on it now and I just noticed that all 4 tires have dry rot type cracking around a slightly depressed ring on the sidewall of the tires. This looks similar to the defective tires described in a voluntary recall of the same tires in 2021. These tires appeare to be defective. There is no reason that tires that are a few years old wth only 9500 miles on them should have this uniform dry rot type cracking on all 4 tires. I took the truck to Discount tire and the technician confirmed that the tires were not safe to operate so now I have to buy all 4 tires and I am replacing the spare as well. I should not have to buy a whole set of truck tires at 9500 miles! 2021 Recall information: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)