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To expand on that.... A truck weighing 30Klbs.... with 10 aired down G272s = 1,470 sq in of area. So, we take 30K and divide by the 1,470, and you get 17.2413793103 ... So, ~17 PSI For contrast, the average human foot exerts ~6-16 PSI depending on standing, running, etc. Contrast that to 6...

That's why I mentioned contact area. 2x 1200s have larger patch area than 1x 395. In sand, a single 1200r20 is 147² in contact, and a 395 is 220² in footprint. While dualled 1200R20s dropped to low pressure aren't suggested due to tire rub, it's definitely doable. So, 147 *4 = 588² in...

Exactly this! 1200r20s in dual configuration actually have higher load capacity and more ground contact area than a single 395. This is what you need in the wrecker application. 1200r20 = 30,440 lb tire rating per axle, when dualled, and a footprint of 360² in 395/85R20 = 20,400 lb tire...