DHart

We are running Nitto Trail Grapplers 35x12.50x17LT on our Wrangler Unlimited. On the road we run them around 25-27psi.

Is it recommended to air down whenever going off-road or more just when doing more rock-crawling or sand type of driving?

How about general trail driving, where one is driving over varied terrain of hard pack dirt, rock and such? What amount of airing down would be a good starting point for this?

I know the airing down helps with traction... but if traction is no problem, is it still advisable to air down simply to soften the impact from bumps, as well?

951Rubi

I always air down. Usually 15 psi for the normal stuff.

For the tougher stuff and rock trails I'm at about 10.

Softens the bumps, better traction, just all around nicer.

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TreyJK

I usually air down when it starts getting rough. Personally, wheeling is much more enjoyable when my passengers and I are not being flung around by bumps are rocks due to over-inflated tires. However, I also have a CO2 setup to air up my tires whenever I want so I don't have to find a gas station.

SiliconTi

It depends on the trail, and how lazy I'm being. I've run many trails at street pressure. It does ride nicer with less air in the ties, but sometimes I want the extra little bit of differential clearance.

I run 8 PSI off road, 2 PSI in snow.

DaK

Would suggest you start at 18-20lbs and adjust from there. Disconnecting your front sway bar makes a big difference too.

We wheel load D 37in toyo's and air down to 18 for fire roading, 12 for "light" rock crawling, 10 for the serious stuff but we also have beadlocks.

ShutterBug

Disconnect and air down. I run 35" Duratracs and usually do 12 psi in the front and 13 in the rear.

mdash

I always air down when going off road, even if I'm just running forest roads. Having less air pressure makes the washboards and pot holes a lot smoother and makes the day more enjoyable. You'll want to play with different air pressures to see what works for you. Obviously, I'd recommend you carry some form of air compressor or co2 tank to air back up at the end of the day.When I was running 35's with my stock wheels, 10-12psi seemed to be the magic number. It didn't hurt steering or really kill the handling too much, yet it absorbed the bumps nicely.

sgt381fl

i aired down to approx 20 psi. i have 35" mt baja atz tires on 17" wheels. i noticed my jeep's performance a lil "sluggish", needing more throttle on hills and terrain that ive conquered in the past when i didnt air down. is this "normal"? is it cause of having more tire contact on the terrain ?

Maertz

Shit i ran 20 on road... Ran like 12 without beadlocks on a narrow rim with no problems. On beadlocks id run like 6. But lots of variables here...