No, you wont shred your tires in gravel or dirt at low pressures. On pavement where a lot of heat builds up, you will want to limit the miles you put on them even though I have run 30-40 miles at 50-60 mph at 12 psi.The PSI you run depends on the speed you plan on wheeling. at low PSI, in the low teens, you are going to pop/shred your tires if you drive quickly. Pressures like that are made for slow going rock crawling, hardcore stuff. You'd want to be in the low to mid 20s for gravel/dirt, and maybe high teens for corrugations.
If you run a 33" C rated tire at 8-10 psi while going 40mph through graded gravel, youll damage the tires, guaranteed.No, you wont shred your tires in gravel or dirt at low pressures. On pavement where a lot of heat builds up, you will want to limit the miles you put on them even though I have run 30-40 miles at 50-60 mph at 12 psi.
Just use common sense. If you're on a stock 7.5" wheel with 12.5" wide tires, you could go down to 10 pretty safely (poor mans bead lock). Under that it would be best to have a true bead lock wheel.
As far as stock 33's as I said before, 15 is pretty safe at most speeds.
It kind of depends what trails you plan on hitting really. If you aren't going to Daniel or Dickey Bell you should be just fine at 20 lbs. If you find yourself having some traction difficulties, air down a little more but don't go below 10 lbs for sure. I rocked stock Rubicon JK tires at 12 lbs all day long on all the Uwharrie trails. Air dam comes off easy. Disconnect the front sway bar once you are there and reconnect before you go homeThanks everyone for the replies, I'm thinking i'll probably shoot for around 20 psi. I heard from someone with a 2018 Rubicon that the last time they went to Uwharrie (which is where I am going), they didn't even have to air down their tires. Now just deciding if I should remove the plastic air dam on the sport.
Multiple teams have run the Baja 1000 on ko2's at 10-14 psi, you should let them know that they are damaging their tires...guaranteed. Low to mid 20's for gravel/dirt? I wonder how they can race on half that pressure, at 3 times the speed, on that same terrain, for 1,000 miles?If you run a 33" C rated tire at 8-10 psi while going 40mph through graded gravel, youll damage the tires, guaranteed.