check the presure
Some tire places put in the max psi when mounting the tires?
I run about 35 psi around town and sometimes get the low tire warning when cold. When fully loaded on a trip I run 45 psi on the highway for mileage. I haven't taken the tires below 18spi yet off road. No need so far and I can still run short distances on the hwy to get to teh next dirt road
Off road a larger tire can run at a lower pressure than a smaller tire and still support the vehicle.
The lower presure off road will result in a softer ride, a larger foot print and better flex over rocks and bumps