OP wrote:
I'm about to custom order a 2020 F350 4 x 4 and according to Ford the tires included are: LT275/70Rx18E BSW A/T. These are to get the E load rating on the tires needed to get 11,500 GVWR.
JFI.. a side note here....
tires are fitted to the vehicles axle ratings per fed regs ...not the vehicles GVWR.
A F350 srw may have a 6000 FAWR and a 7230 RAWR = 13230 lbs.
Now the vehicle mfg chooses a tires capacity to equal or exceed that number like the size you mention. This gives the truck a 14500 lb combined tire load rating which covers your trucks 11500 GVWR nicely with plenty of reserve capacity for carrying max axle loads.
The wifes 1500 chevy 4wd has P265/70-17 all season tread which carry a M+S rating.
