2017 trailer, picked up July 2016. Goodyear Marathon's.
Went out twice in two weeks. First trip I detected a slight bit of vibration on the road. Was unsure if it was the truck or trailer. Following week I went out again. On the Interstate felt the definite vibration and pulled over and took a look. Nothing I could see with the eye. About 10 miles later there was no denying, had a flat on the starboard side, forward tire. The tire was so shredded there was no way of telling if it was a bad belt. There were no signs of cracks or anything like that on the tire walls as I'd experienced with Endurance tires on my RangerTrail years ago. But I never had a tire come apart like this before.
So I guess what I'm saying, if you "feel" something isn't quite right - trust your gut.