I put quite a few miles on my OEM tires, but one had separated tread after a year and a few thousand miles. I replaced it with a Maxxis tire. I went to Phoenix and back in February, about 2,000 miles round trip. I replaced the other 3 when I got back with Maxxis. Two of the three were beginning to have tread separations. I just got lucky both times. I really pushed my luck because the last 3 had about 12K miles on them, but were only 4 years old. Like OldCoot, I won't trust OEM tires again. The $400- to 500- extra will not be hard to swallow, and I really hate being on the side of the road. I've got 2 trips of about 600 miles each on the Maxxis tires so far and they're barely showing any wear... and neither is the one replaced first which has at least 5,000 miles on it so far. I researched this and other forums and bought the Maxxis because of how few negative comments I read, as opposed to some others. And, as mentioned, steel valve stems and a good balance goes a long way.
J & D in Lovely Weatherford, TX
2016 Jayco White Hawk 28DSBH TT
2014 Ram 2500 Crew Cab 4X4 6.7L Cummins