What if your jeep doesn't weigh 4450#? Most are heavier than the published curb weight. My LJ is 4720# as currently equipped, full tank of gas, me, but no gear - its true curb weight as built. [Note: some/(most/all?) manufacturers allocate 150# for the average driver in published curb weights.]
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Another method for determining tire pressure when changing sizes from stock to larger is to use this calculator, which is based upon a spreadsheet derived from the Tire and Rim Association Load Inflation tables:
https://tiresize.com/pressure-calculator/
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If you would prefer to calculate on your own the appropriate starting tire pressure for your new tires based on the actual weight of your vehicle, the TRA Load Inflation Table is here:
https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf
Accurate results will require getting your jeep weighed, front axle + rear axle, with a full tank of gas + your gear + you. (The total may surprise you.) If you don't have access to a public scale, then use the jeep's GVWR and approximate.
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BTW, weighing my jeep and then using the TRA tables suggests tire pressure of 26 psi for my LT315/75R16-E Mickey Thompson Baja ATZ P3 tires.
For comparison, when I purchased BFG KO2 LT265/75R16-E tires for my Sprinter, which weighs almost exactly its GVRW and was originally equipped with LT245/75R16 tires, the tire pressure calculator showed recommended pressures of 42F/60R rather than the 49F/70R shown on the door placard for stock tires. I then called BFG and asked them what pressures I should run with the larger tires. The answer, not coincidentally, was 42F/60R. Seemed low for that much weight, and I'm sure there will be more gear/weight in the future, so I run 45/65.