Quote:
Originally Posted by brulaz
I think the door sticker is for the tires supplied with the new truck. If you switch from P-rated to LT-rated tires, the sticker doesn't apply unless the tire shop put on a new one.
When towing, I increase the pressure on my factory P-rated tires to the max # on their side-wall. This is higher than what's on the door, but gives a less squirmy feel. Since 90% of my driving is with the trailer, I'm just leaving them at this pressure. So far, the wear looks pretty uniform.
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I think Brulaz is right. The door sticker lists the recommended pressure, but it also lists the OEM tire size, tire type, and rim size, and I assume that they all go together. If you change the tire size or type, the entire sticker no longer applies.
That said, I've never inflated all the way to the sidewall "max pressure". I don't think I've ever seen that recommended - but I do go up to 4 psi under max, to reduce squirm or "squirelly" behavior.
Bill