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Do what is on the sidewall. What's on the jam doesn't make any sense once you change the tire. Follow the instruction and make sure your hot pressures don't exceed the maximum. The most damaging is underpressure but, overpressure cause accelerated wear as well.
that's terrible advice.. the psi on the sidewall is the max the tire will hold. The same tire on different vehicle will have different psi. If you really want to know the correct psi go to discount tire and have them do the tire pressure calculator. otherwise just put 35 psi. its usually going to be the same.

It starts changing when you have a really low profile tire or a much bigger tire.
 

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Overthinking a simple problem.

The acceptable pressures depend on the load rating of the tire and it's construction and all that info is right on the sidewall, for that tire. That pressure is maximum and is just fine. No tire will suffer for it. It might not be an ideal performance setting but, it is completely safe for the road and in no way terrible advice compared to going by the sticker on the jamb when you may have a different brand or type of tire on the car. Is anyone reasonably trying to suggest that you should go by the door jamb pressures if they contradict what's on the sidewall of the 305 tires and 20" wheels you put on your 2011 V6? Ludicrous.
 

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