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Old 09-19-2008, 07:56 PM   #1
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tire psi

whats a good tire pressure for street? i had a flat at 30 psi on a newish tire, so im wondering if my tire pressure is too high? i was fording a bunch of flood waters after hurricane Ike tho, so i was kinda askin for it with all the wood debree.

iv never aired down my tires, my dad showed my how to use his air compressor so i can easily air down now, whats good psi for diffrent 4x4 areas, mud, rocks, dirt?

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Old 09-19-2008, 08:22 PM   #2
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30 is a good psi for on road. i run mine at 25 cause thats where they wear the best. i usually air down to 15 when riding a trail.

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Old 09-19-2008, 08:40 PM   #3
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Here is a couple questions....
One, what state do you live in? What type of tires are you running?(size and brand) For rocks you want a lower psi but that plays hand in hand with the type and size of rim that you have. For me I keep my tires runnin about 35 Psi. I play in just about everything though. I air down when I need to. I am running a 32" Mud Tire. If you over-inflate your tires they will wear quicker, and if you under- inflate they will wear unevenly. Plus your Gas mileage will suffer.
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Old 09-20-2008, 01:13 AM   #4
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With my previous set of 35x12.5's BFG MT's, I ran 25-27 in town. Any more and they are too hard and give a harsh ride. On the trail I ran 10-12psi.

With my new Irok's I'm not sure what I'll run in town (still installing), but on the trail I'll be at like 2psi...
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Old 09-20-2008, 01:43 AM   #5
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it depends on what tires you are running
I run 30 psi in town and on hwy
off road I run 10 psi for everything but sand in sand I run 5 psi
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Old 09-20-2008, 07:57 AM   #6
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i run about 30 on a 32 in tire on the cherokee and like rketr said about 25 for a 35 in on the wrangler
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Old 09-20-2008, 08:51 AM   #7
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What size tire? Ply? Type?
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Old 09-20-2008, 11:25 AM   #8
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33' pro comp all terrians. 15inch pro comp wheels
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Old 09-20-2008, 11:44 AM   #9
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25 - 30 psi
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Old 09-20-2008, 11:56 AM   #10
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Heres alittle trick I learned a long long time ago. With you jeep sitting on level ground slide a credit card under the tire at the sidewall, it should only go under 1/4 inch if it gos in more you have to much air, if less not enough. This should help you tire wear correctly on the street.
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Old 09-20-2008, 11:58 AM   #11
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Old 09-20-2008, 12:00 PM   #12
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I run my 30 and LT235 BFG/AT KO's at 40 psi on the road on the TJ's and the XJ, it gets more even wear across the tread. Best way to check is get some of that sidewalk chalk and put a big white patch across your tires from side to side about 4" wide front to back. Do it in a nice flat empty parking lot, ease the clutch out in 1st, go about 100 ft or so, push the clutch in, go to neutral and let it roll to a stop, don't use your brakes. Then get out and look at the patches, if the middle is worn off the pressure she too too high, edges worn off the pressure she too low.
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Old 09-20-2008, 12:17 PM   #13
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