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Old 01-14-2014, 07:28 PM
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what tire pressure do you run?

I've been reading a lot of different suggestions for tire pressure on jeeps. what psi do you run and why? do you run different on road and off road?

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Old 01-15-2014, 05:21 AM   #2
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do the chalk test, theres a video on you tube to tell you how. I run 28lbs with 31" 10.50 AT's

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Old 01-15-2014, 07:15 AM   #3
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I have 31x10.5's AT and run 32 psi on street and drop it to around 15 on the trail.
(Off-Roading with lower pressure allows the tire to 'wrap' around the ground/rock/etc and grip better=more traction. On-Road proper tire pressure improves gas mileage and handling.)
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Old 01-15-2014, 10:32 AM   #4
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35x13.50-15 Toyo Open country MTs. 26 psi on the road. 12-15 for most wheeling and 8psi in sand.
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Old 01-16-2014, 03:08 AM   #5
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I have 35X12.5X15 KM2's and they have a fairly stiff sidewall, so I run 26 on the highway, 12 in the mud, and 8 for on the rocks. I have never popped a bead, but at 8 psi I have spun the wheel inside the tire. Yeah I know, bead lock wheels, but my aluminum wheels look cool...lol.
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Old 01-16-2014, 08:27 PM   #6
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I typically run ~7.5 psi off road.
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Old 01-16-2014, 08:32 PM   #7
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On road 25-30 psi Off road 2-3 psi
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Old 02-01-2014, 10:41 AM   #8
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I don't want to start a new thread over something that's been talked about this much. So I'm going to post here. I've been meaning to do a chalk test on my new tires, but haven't got around to it. My jeep is in my garage right now and I (accidentally) did a wet-tire-on-dirty-floor test. Is this patch wide enough? Or should I go 2 or 3 psi lower?

By the way they're 33x12.5x15 MT/R Kevlar's running at 27psi each.
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Old 02-01-2014, 10:53 AM   #9
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315-75-R17 Mickey Thompson running 29 psi road. Completed caulk test to check pressure and the thread is within a 1/2 inch of edges.

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