Derating my four LTX (P)235/75R15 XL Michelins to 1,985 pounds from the sidewall rating of 2,183 pounds at 50 psi means that the four tires will support 7.940 pounds. The two axles (each rated 3,600 pounds) will support 7,200 pounds.
I went across the scales at just under 5,900 pounds on the trailer wheels with nearly all the stuff and a full fresh water tank of 39 gallons.
The math works out to about a 26% safety margin for the tires at derated load capacity. There is about a 1.5" gap between the edge of the tires and the aluminum wheel well trim.