Originally Posted by AAAA
For conditions you describe I would NOT air down, just drive slowly. Airing down in those conditions increases the risk of sidewall being cut by rocks and possibly tire bead coming off wheel. Airing down is suggested by some people (but not some experts) for beach driving as it increases the footprint aiding in tire floatation.
(YMMV as mine does) It does depend on how fast you plan to drive. For washboard gravel roads, if you keep your speed under 35mph you can safely air down to 18-22psi without worried risk of popping a bead or cutting a sidewall.
It will definitely soften the ride as well as help you maintain control around corners rather than having your fully inflated tires bounce on the washboard and causing fish tailing of your rearend.
When I'm running actual trails in my JGC I run 12-18psi truly flexing my side walls and have no concerns about popping a bead or cutting my sidewalls while driving up, over or through rocks and boulders, but I do have 32" Duratracs.
When I wheel my JKU I air down my 37" BFGs to 8-12psi.
Do what you feel comfortable with, but unless you directly hit a hole or a large rock/boulder, you shouldn't pop a bead or cut your sidewall.
Enjoy your Jeep off the beaten path that's what they're made for!
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