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Unread 05-07-2011, 01:27 AM   #1
devinci
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stock tires

Hey guys,

Should I be airing down with stock sized tires when I go off-roading? This weekend I'll be mainly on rocky trails with the occasional muddy spot but nothing too rough.

Keep in mind my WJ is still at stock height as well.

On-road i run them at 33psi.

Any suggestions?

Thanks

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Unread 05-07-2011, 07:41 AM   #2
Holm-z
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1998 TJ Wrangler 
 
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Airing down will give you better grip on rocks and obstacles.. I recommend it. I think if you aired down you will probably lose about an inch or so of clearance depending on how low you drop your psi.
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33x12.5x15 Goodyear Duratracs

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Unread 05-07-2011, 09:04 PM   #3
devinci
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That's what I was debating. There are already a few spots where I scrape on this trail so the extra gc might help.

Is there more of a risk of puncturing a tire if I left them at road pressure?
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Unread 05-07-2011, 10:46 PM   #4
92 Green YJ
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you may be more likely to puncture at street pressures as the tires wont flex around the rocks as much as they will aired down. Id go down to maybe 20PSI as a starting point and see how it goes, you can always take more out or put more in.
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Unread 05-08-2011, 07:10 AM   #5
Holm-z
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I wheeled many times before without airing down and never popped a tire, its all about being careful and picking good lines. I have noticed that it does make a big difference though if you air down, I was amazed at how much more grip I felt on the trail. I bought a small portable compressor that plugs into the cigarette outlet for filling back up after the trail.
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1998 TJ Sport 4.0L 5spd
3.75" RC
33x12.5x15 Goodyear Duratracs

Monstaliner, CB Radio, Driving/Fog/Rock/Reverse lights



My build thread, work in progress...


I understand.

IAFF Local 3265
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Unread 05-09-2011, 08:22 PM   #6
billzcat1
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Definitely air down. On all-terrains with no beadlocks, I think 15-20 psi is about right to give you some resistance to blowing the bead and not compromise your ride height too far. Not only will it help your level of grip, but also level of comfort off-road. A tire at 15psi absorbs a lot more of the impact from every single bump. If I might make a recommendation, the MV-50/MF-1050 air compressor (usually $60 or so) is an excellent budget compressor that will refill your tires in about 2 minutes each when you are done for the day. It draws 30 amps and connects straight to the battery with spring clamps.
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