In the "just when I thought I had an understanding of this" column!
Now comes a comparison of E1 vs E2 load range. As I feebly understand Discount Tire's own material, E-rated tires sized 305 and up carry an E-2 load range and a max inflation of 65 psi while E-rated tires sized below 305 carry an E-1 load range and a max inflation of 80 psi. It is apparently entirely possible to run an E-1 or an E-2 tire having the same max load capacity, etc, so the primary (sole?) difference would seem to be overall sidewall stiffness and related handling situations. I admit it's funny to use "handling" and "8,000 lb pickup truck" in the same sentence, but I have to say I've noticed a meaningful improvement in driving/handling when running E1 rated tires at 75-80 psi.
Has anybody run E2s on a truck formerly running E1s and noticed any decline in handling characteristics? I would think the taller tire (305 to 315) running 65 psi max would have to feel squishier than the same tire in a 285 size running 80 psi, with each tire being from the same manufacturer, tread design, and operational application.
Bottom line for me is I'd like a touch more tall (315/75R16) than the size I'm running now (285/75R16) but I don't want to give up sidewall stiffness and "handling". I still chuckle when I write that.....my truck "handles" like a Porsche with 4 flat tires.........and that's on a good day.