Someone explain the difference and which should I purchase! Pulling a 28 ft enclosed race trailor and car,atv,tools, etc.

You might try the tirerack.com website. They have load ratings, specs, dimensions, etc. on all brands of tires. JJ

10plys are designed to carry more weight and are made stronger. they will ride alittle stiffer but will also last longer . If your pulling a trailer, you need the 10 plys. Don't let anyone tell ya you can get away with 8s. Safety is the issue with pulling a trailer. They'll cost alittle more but they will out last 8 plys byfar with the weight of a trailer.

I'll take my D rated BFG AT any day over the stock E rated crap from the factory.

Load range is what's important.

Larger sized D rated tires have a lot more capacity than small E rated tires.
Take a Michelin 225/75-16E tire 2680# cap @ 80psi
Take a BFG AT 285/75-16D tire 3305# cap @65psi

You need to also consider sidewall flex/stability difference between the taller 8 ply and the shorter 10 ply.
IMO the shorter 10 ply has considerably less sidewall flex and is more stable in high cross wind conditions.
The closer you stay to the stock sizes the power will stay the same and you will not have speedometer corrections.
I have over 5000 miles pulling a 40' 5th. wheel toyhauler this year and I upgraded my tires and wheels mainly for safety!
My 225/70R/19.5's are F rated(3640lbs. 12ply)stiff sidewalls and they are about 2" taller.
There is a very slight reduction in power and my speedometer is off exactly 5mph at an indicated 60mph. Pulls great in a crosswind and when passing semi's.
Which ever way you go there are trade-offs.

Happy Trails.

I stay w/ the BFG AT which have an extra ply in the sidewall and I also run 285/70-17 which cuts the sidewall down another 1/2".
I just wanted to show same size rims for comparison.
19.5" wheels and tires are quite an upgrade $$$$$.

Well I was thinking of upgrading to the size 265 and keep my stock wheels. Will this affect my speede or drivebilty much? I will be towing fairly heavy, just thought the 265 would be a little better looking.

Something to consider....the typical 19.5" tire is rated for speeds up to 75mph.
You decide....

Well I was thinking of upgrading to the size 265 and keep my stock wheels. Will this affect my speede or drivebilty much? I will be towing fairly heavy, just thought the 265 would be a little better looking.
U won't notice much difference in power w/ 265.
It's only a couple of mph @55 difference.
Put a box on for the towing, that 40-60 hp makes a world of difference.

I did'nt notice much if any difference with my 265's and they do look much better

Dunlop Radial Rovers and General All Terrains come in size 265/75/r16 WITH a load range E rated at 3410 lbs. You get the looks and the capacity/stability of the 80 psi Load range E tire.

U won't notice much difference in power w/ 265.
It's only a couple of mph @55 difference.
Put a box on for the towing, that 40-60 hp makes a world of difference. Which box predator or edge?