NOPE. When we are at the Outerbanks in the sand I run 8 psi.

 

well These are rated for 65psi im running 45psi on the street, and I think prolly 20-25 on the trail

 

45 that has to ride like the tires are rocks, try running 30-35 you'd be surprised at the difference in ride, I doubt at 45 you are going to wear those tires evenly, have you done a chalk test? the 65psi or any rating on the sidewall of tire s is the max psi they are rated for not what you should run them at.

 

X2 on that^^^^^

I run 27 frnt, 26 rear on street.

10-12 psi on the real tech trails. 14ish on easier trails.

35 BFG KM2's

Do a search on this... There are 1000's of responses. Anything much over 30/32 on tires 33"+ is crazy. There really is no way they can have a correct contact patch unless you have another rig stacked on top of yours!

 

I knew there would be some controversy over psi!

KM2s 35x12.50R15

26 street / 12-15 off road.



Woodweavil, you should let some air out of those things. Way too much money spent for you to not get the tread life they are meant for. I believe those are even wider than 12.50??? I would run under 30psi if I was you. Now that you are in the bigger tire club, you should run 15psi at the most off road. The difference in the ability would be huge! Just my $.02 and take it with a grain of salt. But remember, I will be filming you the next outing, so I want some serious action!

 

Stock Rims and Tires on 2008 Rubicon.

10 psi on sand dunes
20 psi on Drummond Island/Badlands Terrain
35 psi on Street

No issues with above psi. Great topic to cover...planning on 3" FT Ultimate with new 35" wheels/tires installed within a couple of weeks, so I'll be reading over new suggestions.

 

I run 30 psi on my 35" Toyo's and then air them down to 15 on the trail. I've got them mounted on my stock 17's and haven't had a problem yet. I did have to go and have the dealership lower my psi setting though, factory it's 38 psi, and they lowered it to 28.

 

Thats cool I have never had any tires this big. Thats what he had in them. they ride much better and much smoother than the bfg/mts I had on there. How do I do a Chalk test? Im open for suggestions but I dont want to hurt my milage any more by adding rolling resistence.

 

With that type of PSI, you are riding on the center of the tire and not hitting the left/right-center of the tire and beyond. You will end up wearing the center out with the edges looking new. Ideally, you want all but the outside 1/4" to 1/2 hitting the pavement when driving. That will ensure a long life for your tires. When I went to Discount Tires to have mine put on they already knew what PSI to put in them. I was going to tell them what PSI I wanted, but they were already on the same page. These size tires aren't something that tire places put on regularly, so it is hit or miss with the people working. Some know and others don't.

The chalk test:

Use a piece of chalk or sidewalk chalk and draw a line from the inside to the outside perpendicular to the Jeep or tire travel. Straight across the top of the tire, if that makes sense. Now, take the jeep down the road for a few miles and then check to see how the chalk looks. Most of the chalk should be worn, but maybe the outside edge. If only the middle of the line is worn off, then you have too much air. If the entire line is gone, then you could have too little air.


Oh, and don't sweat the rolling resistance. You will be fine with lower psi and no worries. It will actually be safer to have a little more meat hitting the pavement. Those are some tuff tires and not your ordinary street tire.

 

One last thing Buster, when you went to 35s, you already killed your mileage. Accept it now!