2014 2500 Cummins air down

[band nerd]

2014 2500 Cummins 4x4 SLT short bed, stock
Stock wheels, no bead lock
275/70/18 Cooper Discoverer ATP rear, older Adventurer in the front, all Load range E

Traveling to Big Bend NP (TX), plan on some light-med trails (no Black Gap,...yet)

A: Minimum air down for front/rear with no bead lock, taking weight of Cummins into consideration.
B: If I stay around 35-40 psi, any issues driving paved roads back to campground, unloaded/
Max speed in the park is 45. Distance to camp on pavement anywhere from 20-70 miles. Of course, I would air up all the way going home.
I do have a Viair 400p so I can air back up if needed, but if I plan on several days of trail riding, maybe I could avoid multiply air up/down as long as I stay in the park. High temp maybe low eighties while we are there.

C: driving as daily driver, no load, suggested pressures?

No serious rock crawling, just for softer ride and puncture avoidance, better traction. Most of the trails in Big Bend are high clearance issues, many doable in 2wd.

D:C: yes,I reset TPMS with AlphaOBD. That has already paid for itself (tow mirrors, etc.)

 

[SouthTexan]

I run 45 psi (front and back) unloaded and only air up to 70-80 psi when towing. I am on E rated Nitto Ridge Grapplers.

You would probably have no issues going down to at least 30 psi, but I would check your sidewall to see if there is a minimum on there. Or look up the load ratings at different psi from your manufacturer. Google to see if Cooper has a tire inflation chart or load rating chart for your tires.

I am planning on a trip to Big Bend next year in the Jeep. Hope you have fun!