You might want to take a look at the load rating of your present tires and compare to the weight you think they're carrying. As you'll find in other threads, it's easy to underestimate the weight of the cargo and go over the GVWR and it's also possible that the tires have very little extra margin. It's a good idea to weigh your loaded trailer rather than guess, and then compare against GVWR and also against the combined load rating of your tires. This will give you an idea of how close you are to their rating.
Then to avoid creating new problems, see if you can find the same size tire you have now but with a better load rating. This probably means going to LRD from LRC. Don't exceed the GVWR even if the tires look like they'll take it.
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