samiam

Just put on some 33s and got the jeep legal so I’ve been blacktop ridin. Aired the tires up to 30 psi and thinkin I don’t need so much air. I’m goina try bout 20 in the rear cause I ain’t got nothin back there and 25 up front. What’s everybody else runnin?

andrewmp6

Google chalk test tires that will give you the best psi for your jeep as is.

Bugout4x4

25 front and rear is what I run unless I am on a long highway trip when it is hot outside or loaded heavy. After a few hundred miles the tires will themselves tell you how close you are by how they are wearing.

samiam

Guess I should’ve added that this is not highway drivin but country 2 lane roads at 40 to 45 mph. Yeah I know I should’ve “googled” it. I had 15 rear and 18 front for some trail ridin and it felt great but I thought I should air up when mostly hard toppin.

Bugout4x4

They should wear a little more even on the black top without cupping at 25. Just watch how they wear and adjust accordingly.

EZEARL

Anyone familiar with this and actually tried it?
http://gojeep.willyshotrod.com/HowtoTyrePSI.htm

Dumajones

Im running 33,12.5,15... I did the chalk test until they looked nice with a flat foot /no cupping. My front air is 22psi and my back is 20psi.

Do the chalk test.. some brands need more air, some less. Not all tires are the same.

Bugout4x4

Absolutely! But that is a trade secret! lol This does work very well to a point because this is actually how they engineer and design tires to operate. The only problem is this can fluctuate from an average accuracy a pound or two when the ambient temperatures are extreme one way or the other, so this has to be judged off the cuff how much while accounting for the outside temp if it is extreme.