George B
¯\_(ツ)_/¯
I used to always go by the ply rating and/or load rating but found that the way tire manufacturers rate and build tires seems to have changed. The old alpha load ratings of B C D and E or the P and LT tires seem to have been replaced by a load index number. They seem to be using fewer plies and still reaching the same load rating. Of course this reduces the resistance to punctures that came with the added thickness of the higher rated tires.On bigger rims though.
See, I'm thinkin' basically unless tires are labeled "LT" they won't be 8 ply equivs.
6ply equiv LT tires are the MINIMUM anyone will run out west on even gravel roads. The ranchers out there usually run 8ply equivalents. I could be wrong but basically 4 ply equivalents are pass. veh tires at a max of about 50psi, 6 ply equiv. LT tires might be max press. 60psi and 8 ply equivalent LT tires will be around 80psi.
BFG A/T tires are usually 6ply equivalent (3 plys that count as 6)
On my 1996 Tahoe, my old Coopers, two sets, forgot the model name both All Terrain tires had a make press. of 80psi.
You could run all day at 85mph and be assured you could also drive on railroad ballast for hours and never get a flat.
I find it confounding that no Light Truck rated tire is spec'd out for these nearly 5k lb SUVs.
Disturbing.
Good luck on your search.