re: Tire pressure on truck tires question.

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I have always kept my truck tires at 35 psi.

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+1

It also depends on a couple of other factors:

1. Is it a multi-ply tire? I run my BFG A/Ts at 35 psi where I used to run my BFG Rugged Terrains at 40. If you run a high-ply tire at a higher pressure you will get more axle jump over bumps and you don't want that when you're going down the highway at 80mph.

2. Keep in mind that your tires will increase by 1-4 psi once they reach operating temperature. Increases in temperature cause increases in pressure.