Originally Posted by AmiableDave

There hasn't been 10, 14 fiber ply sidewall tires in decades. Tires of today may have only two or three fiber plies in their sidewall. It's the rubber compound used in the sidewalls nowadays that gives a tire it's alphabetical rating.
I'd worry about the load index of your tire before I worry about the sidewall alphabetical rating. I have E tires with 120 load index. Tires of the same alphabetical rating have different load indexes. I also have a speed rating of S.. 4 tires inflated to 80 psi can carry 12,344 lbs. When all is said and done I have a ton to spare. The tires can handle 112 mph. That's good enough for me.
The National Transportation Safety Board has under inflated tires at the top of the list of sidewall blowouts. Next is tire overload. That's why knowing your tires load index is important. Then take your tire of choice. Combined the load index and subtract your trailer weight, your boat weight wet, accessories and supplies. In other words loaded it up and take it to the scales. See what you have left over. What speed are you going to run your tires at? I run 70/80 mph on the interstate with tires that can go to 112.
There's a lot that goes into tires. Don't have a false sense of safety by just buying load range G.

Originally Posted by neva satisfied

Good information!! After looking into it more I'm going to have to stay with an E rated tire or one with the correct load index. The wheels that I have are only rated to 85psi so a heavier tire is out.