So it turns out my odd rear axle tire wear issue is loss of preload camber on the axle. Buddy's shop so it won't be too awful expensive to replace.
I swore off Goodyear back around 2005 when I got the ****tiest set of MT/R tires that absolutely rode like they were square after about 4 attempts of balancing including road force. Yet here I am praising the trailer tire haha. Time heals all wounds I suppose.Marathons. Junk. They were on a lot of trailers as standard equipment for years. Poor wear was my biggest issue. Get maybe 3-5K out of them before they were worn out. Not a heavy trailer either. Figured it was axle misalignment the first time it happened, but a different brand on the same trailer produced much longer and even wearing results. Happened several times on several trailers.
Maybe the Endurance is better than those older ones, but GY has just lost me as a customer, given my experience with them.
You did better than I. Only 18,000 on mine and think that was pretty goodI'm on my second set of GY Endurance on our Airstream. I replaced the first set out to age, (about 6-7 years). They wore well and survived trips to Alaska and Newfoundland, over 25,000 miles. I've had no issues with them, though I've read others have.
I crossed my fingers and went two seasons on my "Storm King" China bombs and made it. I put Endurance tires on this year and noticed immediately the improvement not to mention the greatly reduced fear of a blowout. First, the Endurance tires must have a much stiffer sidewall as the trailer was much better "planted" and I quit seeing the back corners of the trailer on a regular basis. It improved the ride very noticeably to the good... I have about 3500 miles on them at this point. One last trip of around 2K miles coming up...I replaced my boat trailer a few years ago and only have about 5k miles on the replacement. A few weeks ago, I was heading over a mountain pass on a 5.5-hour trip for vacation when I heard a "whoop" sound and felt a little shimmy. The truck is so heavy duty I really didn't feel much, but a quick check of the mirror told the story as I watched pieces flying off. Fortunately, I was carrying a couple spares and had the tools I needed to remove the ruined fender. I've been hearing a lot of stories about boat and travel trailers coming stock with "China bomb" tires. I know in the future I won't hesitate to replace new tires if they seem suspect. It could have been much worse and I'm sure an undersized tow vehicle probably would have felt it more when it let go and started dancing.

My tires typically age out. I replace them every six years or so mostly due to deterioration of the sidewalls. This time I thought I would try Bridgestone DURAVIS R238 LT235/85R16s since they are a commercial tire and have solid outer treads. They can be recapped so I figure the sidewalls are pretty durable. And these suckers are heavy. They are made in the US. A buddy of mine bought a new trailer and I suggested the first mod was to change out the Chinese Exploders for something made in the US. He did.
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I have about 6K on them and they are wearing well. I put Bridgestones on my wife's accord last year and so far so good. They are way quieter than the OEM tires.I've always been a Bridgestone fan and ran a few sets of R500HDs with great results. Curious to hear how you like the R238s.
Check out Carlisle Radial Trail. Are made in 13 inch sizes.Goodyear Endurance is my current goto tire but they only make 14-15-16". Contrary to the Marathon, the Endurance is made in USA. Though I've seen some say theirs were made somewhere else offshore but not China.
FWIW, many swear by Sailun for heavy RV tires and they're made in China. only 2 16" sizes
There's a couple domestic brands that are reportedly reliable, Hercules comes to mind.
I've got some craptastic chicom tires on my echo atv trailer, but they're rated to 78MPH and seem to be doing fine. Can't replace them with goodyears as they're only 13". I'd have to do a lift to fit 14"
Have to replace them at 5-7 years depending on storage too, they are not dependable past that age.
Have Goodyear Endurance on both our TT and utility trailer. Swapped the china bombs out immediately on both trailers after getting them home.
The little boat trailer is stuck with em due to a smaller size....