37s Load D or E?

[KiwiMtnClmbr]

Look at the Toyo tire table data (it's not specific to Toyo but is tire industry data).
I'm unsure if the carcass is different C vs D vs E load, since they're no longer 6 vs 8 vs 10ply.
I've chosen to run a 37x12.5x17 D load vs E load, as looking at the table data vs my actual axle weights, there was no advantage to run an E load as I'd never be weighing heavy enough to hit the higher psi/load rating of the E (meaning, D and E data were the same load rating at 50psi up to something like 3200lbs or so).

Understood/agreed. I was asking Regcabguy if he was running the 50psi(C) or 80psi(E) version of the AT3 in size 285/75r17 when he experienced the unsettling windy condition squirm...