I said this, and I stand by it!
I have the Tomax tires....
ST 235/80 R16 @ 80 lbs = 3420lbs...3420x4 = 13,680 lbs
My trailer GVWR is 11,785 lbs
My trailer GAWR is 5,200 lbs each axle
Total GAWR (2 x 5200) is 10,400 lbs total
Scale weight of trailer (loaded) is 9,860 lbs
(this is offset by the fact that the king pin is putting
1,880 lbs on the truck)
Scale weight of trailer axles is 7,985 lbs
Pin weight is 1,880 lbs
So....my pin weight takes off 1,880 lbs from my trailer weight. This means my tires have a super buffer, are doing fine, will support 13680 lbs and I only have 7,985 lbs on them. My axles will support 10,400 lbs.
I have had no problems in 3 years with Tomax tires.
I think those who have had problems probably have 15 inch rims and are under inflated, or their tires are over five years old, or they drive over 65 mph?