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Old 01-19-2012, 09:06 PM   #1
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air pressure?

What's a good air pressure to run for everyday driving with 31x10.50 15's?

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Old 01-19-2012, 09:23 PM   #2
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The tire shop I bought mine from said 34 psi on the front and 32 psi on the back. I've got 31 pirellis

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Old 01-19-2012, 09:27 PM   #3
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I run my fronts at 34 and the back at 32. It's what Bob Jane tire mart told me
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Old 01-20-2012, 12:40 AM   #4
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Others in this forum have stated the "optimal" pressure for a TJ on 31s is 26 psi. I used to run 25 psi on the street, but lately I've bumped it slightly to 26-27 psi. (When I'm off the pavement, I typically drop to 15 psi or less depending on the terrain.)

While the tires can handle it, I'd say 32+ psi is too high for a 31" tire on a TJ (unless you're towing or fully laden).
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Old 01-20-2012, 12:51 AM   #5
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Yeah just checked the Tj forum for tire pressure on 33's and their running them at 25-28 with 34 on the highway. I'd agree with Sherpa. Gonna let mine down to 25 tonight and see how she handles. Probably make for a softer ride than I'm used to.
Keep ya posted
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Old 01-20-2012, 07:51 AM   #6
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I run 26 in mine.
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Old 01-20-2012, 08:44 AM   #7
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I think I used to run 28 in mine...lil high, but I did it for higher gas mileage. I'm running 24-26 in my 33's.
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Old 01-20-2012, 10:02 AM   #8
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Maybe I'm off here but I run 31 or 32 on my tires and I have 31inch tires.
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Old 01-20-2012, 10:29 AM   #9
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28 in my 285's lots of hwy driving but smooth as butter and good even wear so far.
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Old 01-20-2012, 10:48 AM   #10
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Generally speaking, the bigger the tire the lower the air pressure it requires to support any given vehicle. 29-30 is about right for a 31x10.50. Lower pressure for a lightly loaded Jeep, slightly higher for a more loaded Jeep.
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Old 01-21-2012, 04:14 PM   #11
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Thanks all, I will start at 28 psi and see how that feels.

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