I'm not trying to argue your point because I do think it has merit (It is always better to have too much trailer than not enough), I think you are forgetting about the weight transfer to the truck in your assessment of the weight carrying capacity and the axle spread of the trailer. I can only speak for the trailer I have (1997 OTM). The label carrying capacity of the trailer is 12K pounds. I have see a few longer trailers with single wheels (two axles) that has rated capacities of 18,000 lbs. At the time, I thought to myself, there is no way that the trailer can carry any more weight then mine because it has the same axles (and E rated tires to boot!!!). The only explanation I have is that the trailer has a different weight distribution to the axles and the truck to not overload the axles.
I do think this is too much weight for e-rated tires. An E-rated tire is generally rated for around 3,200 lbs. I went through a few tires (granted mine were old and needed replaced anyway, I think this was 99% of the problem). When I finally broke down and got new tires, I went with G rated tires rated at 3,750 lbs per tire.
Again, I am not trying to argue with anyone. Just adding to this discussion (which I think is a very informative discussion).
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1976 CJ 5
1984 CJ 7
1993 K3500 GMC 6.5 TD
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