Street Tire Pressure for BFG A/T 33x10.5s?

[XJLI]

I know it sounds high. Sounded high to me too when I looked into it but if you look at your sidewalls, the PSI should be there and it specifically says for max loads it should be at 65 depending on the exact tire you have. So for loads in mid-range, it should probably be somewhere around 45-50 on the freeway with obvious reductions when off-highway.

I adjusted my tires to compensate for this as I had previously been running them at 30PSI. The change was significant with approximately a 10% increase in gas mileage.

Running 45-50PSI is still way to high unless your Jeep weighs 5000lbs loaded with gear.

 

[HeavyMetal]

50 psi is unnecessary and will cause uneven wear.

 

[John90XJ]

I've found 30 psi is about right for my 33/12.50-15 BFG AT/KOs with a 4700 pound XJ.

50 psi max pressure for the 10.50 wide tire supports 2620 pounds. Most XJs would be hard pressed to have half of that weight on each tire.

Find what is comfortable, wears the chalk line correctly and supports a reasonable fuel economy and roll with it.

 

[DaveInDenver]

We ran to the store earlier today with the tires at 30 - front, 28 - rear, and noticed the outside lugs of the rears still had the dust on them from our dirt road which we left behind 45 miles ago.

This is the best indicator or alternatively you can draw a line with chalk across the tires in a couple of spots and see the wear pattern. That's how I figure out my ideal pressure and adjust from there. On my truck running 33x10.50x15 BFG M/T I run 40 psi in the rear fully loaded, 33 psi empty. Fronts are 33 psi all the time. Air down usually to 18 psi.

 

[OverlandZJ]

For years i ran 32psi on my BFG's, recently bumped up to 35 trying for a tad more mileage.

 

[RedRocker]

I run 30 on the street and 13 off road.

 

[cybercat]

I run 40psi on the road and 18psi off.

 

[XJLI]

I run 40psi on the road and 18psi off.

that is terribly high.

 

[Mekcanix]

personally i am running 33 all the way around and 10 offroad and that with a semi loaded XJ I ran them at 25 coming back from a run this weekend and used more fuel coming back then heading out but nicer ride

 

[wADVr]

I have always ran 35 on the street and 10-20 on the trail-forestry roads. Wear has been even over 50k on a set of metric 33x12.50s

 

[IllianaXJ]

4500lb XJ w/ 33x10.50s - 35psi street, 12psi trail.