I don't have many facts or a data sheet to that effect. However, I have heard enough about the problems with the Marathon tires, two of which failed on me, on this forum to convince me there is a problem. Also, my tire guy will not put the Marathons on a large, heavily used trailer, regardless of their ratings.
Michelin tires are one of the tires recommended. Many of them are not made in the US or Canada, but they are still a recommended tire. It ends up being a combination of what we all have experienced.
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