325/85 R16 = 325 mm section (face) width
395/85 R20 = 395 mm section width
That equals appx 21% greater area
LAV 3 = 16,900 kgs
LAV 6 = 28,600 kgs
That equals appx 69% heavier.
Tire inflation pressure is roughly equivalent to ground pressure I.e. 30 psi tire will exert roughly 30 psi to the...