Originally Posted by Aiyer
I was probably at 34 psi. I did not lower it since I thought it might lower my ground clearance (I could be wrong). The Jeep felt a bit bouncy (lot of rocking) due to this I think.
I just got back from Ouray in the last couple of weeks and did most of the Alpine Loop, Ouray to Telluride via Imogene again, etc. Didn't do Mineral Creek, we hit Engineer from Silverton, went to Lake City and back via Cinnamon Pass. I never lowered my tire pressure from 38, probably should have in a couple of areas as I do carry a compressor. Really no problems but a couple of turns high up on Imogene and one on Engineer which were really steep and rutted out I could feel the QDII doing its thing, ELSD kicking in. Probably wouldn't have happened at a lower pressure. My Revo 2s have 37K on them now.
I have the 2011 WK2 and like I have said, very impressed with it. We were following two nice couples we met on Yankee Boy Basin up Imogene. There were are a couple of spots, one a sharp, steep left turn up a switchback that is rutted out on the left side where the couple right in front of me in a 98ish Cherokee had to take a couple of attempts at the climbing turn. His left rear tire kept spinning as it nearly lost contact with the ground. The articulation on that model is much better than the WK2 and I know my left rear tire must have come off the ground, but I didn't really even feel any wheel spin, that QDII just made that turn and climb on the same track he did with no problem.
The next day we were coming back to Ouray via 550 from Corkscrew and we made a turn too early and went down some dead end trail. Corkscrew when dry is a steep, but easy, easy trail. I had not been down it before, but knew the rating. After a short while on the wrong trail I was thinking this isn't easy, it's clearly a moderate trail. Well the last 1/4 mile before it dead ends at at an old mining camp is a steep, rutted and rocky path. Scratched a steel skid plate nicely and gouged that carbon fiber, plastic plate right in front of the steel plate. I stopped, went from OR1 to OR2 and went down with no more bangs. On the way out, that tire pressure thing came in to play. I was climbing and just spinning tires slowly, slowly climbing out of the steep rocky rutted mess. Spinning tires, but made it on the first try.
The Jeep Sahara we were with could not climb that. Not sure what the Sahara's drive was, Command Trac? Not sure if it has ELSD or not. But, he was running his normal highway tire pressure. He lowered it to 28 or so and was able to climb out. He did not have a very aggressive tire tread pattern, not sure what he was running.
Bottom line, tire pressure can make a difference, but your tire type and 4WD System is a big factor too.