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Old 10-10-2011, 11:40 AM   #1
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NJ Sand psi

Hey everyone,

New to the forum, new to Wranglers.

Bought a new 2011 Wrangler Unlimited in July. Looking to take it on the beach by my house, in NJ, and was wondering what psi everyone runs in that type of sand.

Not sure how much of this you need to know, but i don't think it will hurt.

Everything is still stock except for some features listed below that came w/ the package I bought.

Tires: P255 / 75R17 OWL On / Off-Road Tires
(17 inch aluminum wheels)

4-Speed Auto
Hill Descent Control
3.73 Real Axel Ratio
Auto Skid Plate

Thanks for the help.

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Old 10-10-2011, 12:15 PM   #2
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I've seen stock tires run all the way down to 6 in the sand without blowing beads out (not mine... 6 PSI is crazy, but I've seen people do it), but you have to avoid any radical turns that low. 15 is a pretty safe number, but it really depends on if you're wheeling with others (if you got friends with you, then it's not a big deal to blow a bead. by yourself, suck city), if you have to hit pavement to get to a place to air back up, and how much you want to avoid getting stuck (which also depends on if you got other jeeps with you.).

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Old 10-10-2011, 12:42 PM   #3
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Welcome! Don't have much answer to a good psi, its been mentioned in other threads you can search. I do know that if you don't have a way to air back up again you'll be in a bad way. I recently got a call from a buddy saying that he was A) somewhere he shouldn't be, B) was stuck, and C) was afraid that even after he got off the property he didn't belong that he'd need to air up again. He got a ticket, and I brought the air compressor.

Moral of the story is two fold, always have an air compressor, and don't wheel where you don't belong.
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Old 10-12-2011, 07:35 PM   #4
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Thanks so far, maybe this will help more...

I don't have a compressor right now. I intend to drive on the beach, near my house, and re-inflate at a gas station about 5 min drive (on the street) from where I live. Is there a "best" psi for this? Should I stick w/ 13-15 range. I've even heard some people say that they don't deflate at all...
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Old 10-12-2011, 07:46 PM   #5
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Quote:
Originally Posted by wt201
Thanks so far, maybe this will help more...

I don't have a compressor right now. I intend to drive on the beach, near my house, and re-inflate at a gas station about 5 min drive (on the street) from where I live. Is there a "best" psi for this? Should I stick w/ 13-15 range. I've even heard some people say that they don't deflate at all...
Dont forget to hit the ESP button while in 4h to turn off ESP temporarily. You will have to do this everytime you start but it keeps the jeep from slowing you down:
1) Put in 4h
2) Hold button till a single chime sounds and the light goes solid
3) Go have fun
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Old 10-12-2011, 07:59 PM   #6
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When my daughter and I run the sand we both air down to 12psi. She has 30x9.5 x 15 and I have 265/70 x 17 about the same as you. Works great on the dunes and we drive back and forth on the street a few miles with no issue. I think you gotta get below 10 before worrying about rolling the tire off the rim.

We always run in 4Hi also. Have tried low range but didn't like it at all. We are both in TJ's for what it's worth.
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Old 10-12-2011, 09:27 PM   #7
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PSI depends on needs and condition of the sand - it isn't up to you what PSI you need, it's up to the sand! The moisture content of the sand, the coarseness of the sand grains, and the structure (or lack thereof) within the sand layers will determine its bearing strength and how much extra tire footprint you need to get the job done.

How heavily loaded your vehicle is that day, your tire tread pattern, whether any of your differentials are locking/limited slip, and how much spare HP you have to work with will all play a role. Generally I can get away with road pressure on my TJ (-10.50 tires, BFG M/T old-style) at max GVWR, but need 4wd and extra throttle much more often than I would at, say 12psi.

The nature of the sand will also determine 4-hi or 4-lo; this is a seat-of-the-pants thing, and you'll figure it out quickly.

Also be mindful that hard sand driving, where you're churning your way through deep sand that is providing constant resistence, builds engine and trans heat FAST.
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Old 10-12-2011, 10:29 PM   #8
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Since you have a 2011 and an automatic, unless you have added an aftermarket transmission cooler, only use 4L in the sand. This will keep you from getting the dreaded hot oil message which will send you into the dreaded limp mode.
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Old 10-13-2011, 08:46 PM   #9
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Thanks to all, its nice to see such great replies so quickly. Looking to try it out this weekend. Not much "hard" driving in the sand, just putting the jeep up there, loaded with fishing poles and my surfboard and seeing whats around.

Thanks again
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Old 10-14-2011, 02:38 PM   #10
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Try 15 psi first and you will probably find that you will be able to get around just fine. When you go to air up, just keep it under 30 mph on pavement.

I personally drive a dually pulling a 38' 5th wheel toyhauler out on the sand all the time...I air down all 12 tires down to 15psi.

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Old 11-25-2011, 07:51 AM   #11
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Last question...two posters on the same topic gave two very diff opinions about 4H vs. 4L, opinions for the sand?
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Old 11-25-2011, 11:17 AM   #12
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I use 4H, but I have a manual and don't have the issues that your automatic has. I turn off ESP. You might be OK in 4H with ESP off, or not. I would use 4L for that reason, unless you have a tranny cooler.
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Old 09-09-2012, 05:02 PM   #13
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serious question.. for those tires what is the standered everyday driving pressue supposed to be.. is it 35 or 37?
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Old 09-09-2012, 05:43 PM   #14
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I was just down on Asseteague beach which I would consider pretty typical of Jersey beaches and I ran at 15 psi. Never had a problem.

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