I run low because I know if I blow a bead I can get it back on quick with OBA. If I didnt have a good way to air up on the trail I would probably keep them at 10 psi or so. And yes this is on normal street wheels, actually mine are a set of stock aluminum wheels.

There is no perfect psi for everyone, its always going to depend on the tire/rim combo. Rock climbing is going to require a lower psi than trail riding and ice/hard packed snow is going to require an even lower pressure.

 

i run my cherokee with 9psi all the time on the roads. any more than that with bias tires and i'm all over the road. but that's the design of the iroks, they're not flat style tire, more of a balloon. they like to be aired down.

for most other 33's, you want to start at around 26psi for street and can air down to around 12-18 for the trail.
if you have more than that, expect for a harsh ride, you will just be bouncing over the rocks.

 

I use to run around 12-14 on moderate trails with 31's on a 15 inch rim. Never had a problem at all. Curious to see how my new 35's do next month though.

 

I run 10-15 psi. Depending on what I'm doing and where I am. Haven't lost q bead yet

 

i run 20 in my 35's on the street and 10 on the trail


even at 20psi there isnt any deflection in the sidewall of my tires on the street.

 

I run 15 psi with no issues on 33x12.50 15
I've had them down to 8 psi before had a lot better traction but seemed like I was pushing it so I aired back to 15 psi

 

Yes, I drive around on the highway with 20 lbs, if I'm going to drive on the interstate. Where I live I can be on a mountain trail in a couple of miles and run around town and short distances between towns in the valley I live in with 10-15 lbs.
As far as a DD, my Cherokee is mostly a trail rig, anything over 150 miles, and I load it on the trailer and haul it to where we are going wheeling.

 

9 psi in 37" mtr's on and 8" rim

 

35x12.5x15 km2's.25-28 psi on the street.10 on the trails. Next time out ill try 8, because even at 10 I think they should flex more.

 

I usually pick a nice straight road air down to say 15 lbs, and drive about 50 miles an hour for 10-15 miles, that heats the sidewalls up and they will flex better and hold the bead better afterwards.
The more you drive while aired down the more the sidewalls will begin to flex.

 

Mine have quite a few road miles around 15 psi, and years of trail mileage at low psi, that's why I'm surprised they don't flex more, probably just the nature of the tire

 

Wanna bet? Been running them like that for months. They are 38" TSL Bias on an 8" rim and work fine. I ride rocks and some mud. No bead sealer either. I plan on running beadlocks down the road when I can afford them but for now I carry a CO2 tank just in case. On the few times it sees a little pavement anything over 12psi feels strange with these tires.

 

Holy crap... Haven't had a chance to check this thread for a few day... Didn't expect all these replies.