NEVER run tires at the pressure that is on the tire, at least on a Jeep that is. That is mainly for trucks when hauling. What's on the tire is the MAX that the tire can handle. For most vehicles you go by what is on the door frame sticker, but for Jeeps it is best to do a chalk test. Most seem to be in the 25 to 30 psi range but all will vary depending on the weight with winch, bumpers, size of tire, JK vs JKU, etc.
