What's the lowest tire deflation you've ever done without ruining the tire or having it come off the rim?

 

Ive run as low as 7-8 PSI on the beach in the sand, off road trails I run about 17-20 PSI, and for slow rocky trail (Rubicon Trail) I run 10-15 PSI. Its going to depend on vehicle weight, tire load rating/size, and rim width of what the lowest you can run is going to be. The pressures I've listed were run on TJs and my JK with various tires/wheels. You'll just have to play with the pressures on various terrians to see what works best. HTH

 

I would also add terrain or road condition, tire sidewalls, and the type of travel you are doing. Some places will have sharp rocks that can damage a sidewall. Some sidewalls are more prone to such damage. The lower the pressure, the more the sidewall gets pushed out, the greater the chance of damage. What really sucks is this is pretty much always going to be a "have to replace the tire; can't be repaired" problem. Done this enough times that I now run 20 PSI (after many years of running 15) for my overlanding/expedition trips, and I carry two spare tires ...

 

Got about 900-1000 miles offroad this year at 12-14psi. Granted the nitto tg is a e rated tire so doesn't flex a lot. Edit tcdawg is right. I have a jku running 35x12.5x17 nitto tg that are e rated 10 ply

 

you'll want folks to answer you with more than just PSI. To help you out they should give you tire size, wheel size and width and type of tire.

I run Goodyear MTR's 37 x 12.50 on a 17x8 wheel. Run 10 psi without busting beads.

 

didn't notice this info was posted. my bad, double post

 

2 psi but it is harder to steer

 

7-8 psi is what I always run. 35" mtr-k's. I've burbed a bead a few times but never lost one. I wheel 99% rocks, and with hydro you can turn into the sidewall and roll the bead fairly easily.

Risk of unseating a bead has everything to do with the wheel you run, not the tire. The wheel needs a decent raised inner bead and flat land after it. Wheels that have lower beads and/or v down into the center of the wheel make mounting a lot easier, but can lose the bead easier.

One of the guys we wheel with changed from a shallow v steel wheel that had a decent flat land to a deep v aluminum and lost 2 beads the first day out running 12 psi, which is 4 psi higher than he normally ran. FWIW.