Offgrid Sparky
New Member
All depends on Load Index & Load Inflation Table & axle weights e.g. my tires are D-rated bit Load Index = 124 = 3525 lbs per tire at 50 psi = > 14,000 lbs weight carrying capacity for 4 tires at 50 psi. My F350 CC LB diesel with Grandby shell with fairly complete buildout weighs 10,520 lbs with myself & a full tank of diesel (~1000 below truck's 11,500 lbs GVWR, almost perfect 50/50 weight distribution, 5240 front, 5280 rear), and per my tire's load inflation table it is rated to carry 10,520 / 4 = 2,630 lbs per tire @ 33 psi safely. In actuality I run closer to 45-50 psi on highway for safety margin, fuel mileage & steering response. In general, I run 25 psi offroad, but am willing to go lower if conditions dictate. Having a 10" sidewall (37s on a 17" rim), sensible tire pressures & good suspension makes for a comfortable but well controlled ride.
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