solo tire pressure

[Road_Phantom]

Since I won't be towing my 5th wheel for a few months, I'd like to improve the ride of our daily driver. How low can I go. We have a 2014 Ram 2500 2x2 Big Horn with 18 inch wheels.

[Grit_dog]

ScottG wrote:

Cummins12V98 wrote:

d3500ram wrote:

The door sticker ... list tire pressures to use in the normal operation mode and the max load mode.

^^- This.

My RAM only shows fully loaded pressures.

Same here.
But if I remember correctly, someplace in the manual it ways you can go down to 50 Fr and 45 rear.

^ Yup, bout right.
Remember the wider the tire the less pressure needed to support a given load.
Common 275-285 wide tires on a HD diesel pickup, empty bed, summer I run 60f-45r. Winter about 50-35.
Depends how comfortable you want the ride vs how tight you want it to handle.

[CapnCampn]

You are correct, the 3500s have the TPIS, not TPMS.

[Cummins12V98]

CapnCampn wrote:
I believe in 2014, Ram did away with the light load option, so now your TPMS will complain about anything under it's spec. I've read that 65psi is about the lowest you can go before it alarms. Then you have to go back up to 80 & drive for a bit to reset the alarm.

No alarms on the 3500's

[CapnCampn]

I believe in 2014, Ram did away with the light load option, so now your TPMS will complain about anything under it's spec. I've read that 65psi is about the lowest you can go before it alarms. Then you have to go back up to 80 & drive for a bit to reset the alarm.

[jadatis]

You only need to lower the rear tires.
When the weigt on towbar is gone . The front is notlifted up anymore and so weight on front becomes more, so woud need even higher pressure.
Rear though gets lighter, so can do with lower pressure.
But mayby when not towing youalso have less luggage in the car.

Savest would be to weigh per axle or beter per tire in the new loading.

[Cummins12V98]

JIMNLIN wrote:
I always use what gives my particular truck/car the best ride and the longest tire service. Works much better for my 2500 Dodge/Cummins than the silly door post placard that says 50 psi under the Cummins and 80 psi rear.
This truck has the LT265/70-17 E tires. I keep a front and rear axle scale ticket in all of my vehicle glove box. When empty this truck works best with 45 psi in the rear (1420 lb load per tire) and 65 psi under the Cummins (2120 lb load per tire).
Of course I air up when towing or hauling different loads. I ran the OEM Michelin LTX AS for over 112k miles using those numbers.

On my 98 RAM 2500 4x4 I would run 72 front and 45 rear unloaded. BFG's I would get over 100K and Michelins 120K. I used 3rd gen factory take offs.

BFG's in pic have just over 100K.

[JIMNLIN]

I always use what gives my particular truck/car the best ride and the longest tire service. Works much better for my 2500 Dodge/Cummins than the silly door post placard that says 50 psi under the Cummins and 80 psi rear.
This truck has the LT265/70-17 E tires. I keep a front and rear axle scale ticket in all of my vehicle glove box. When empty this truck works best with 45 psi in the rear (1420 lb load per tire) and 65 psi under the Cummins (2120 lb load per tire).
Of course I air up when towing or hauling different loads. I ran the OEM Michelin LTX AS for over 112k miles using those numbers.

[CALandLIN]

Minimum tire inflation pressures are displayed on the certification label. Unless, there are conditional pressure recommendations in the vehicle owner’s manual.

[d3500ram]

There should be the regular F/R pressures for cold setting:


Plus, the Supplemental Tire Pressure Information for laden and unladen situations:

[time2roll]

Road Phantom wrote:
Since I won't be towing my 5th wheel for a few months, I'd like to improve the ride of our daily driver. How low can I go. We have a 2014 Ram 2500 2x2 Big Horn with 18 inch wheels.

Weigh the axles of the truck. Use the tire chart to determine minimum pressure.

[ScottG]

Cummins12V98 wrote:

d3500ram wrote:

The door sticker ... list tire pressures to use in the normal operation mode and the max load mode.

^^- This.

My RAM only shows fully loaded pressures.

Same here.
But if I remember correctly, someplace in the manual it ways you can go down to 50 Fr and 45 rear.

[Cummins12V98]

d3500ram wrote:

The door sticker ... list tire pressures to use in the normal operation mode and the max load mode.

^^- This.

My RAM only shows fully loaded pressures.

[d3500ram]

The door sticker ... list tire pressures to use in the normal operation mode and the max load mode.

^^- This.

[PawPaw_n_Gram]

The door sticker on my 2012 Ram 2500 list tire pressures to use in the normal operation mode and the max load mode.

I’m sure yours does also. Follow those settings.

You will also likely need to change the tire pressure mode of operation on the dash instruments so your TPMS functions correctly.

I would recommend not driving on lower pressures for long.

A couple weekends ago I had to lower my tire pressures to 20 lbs on the rear, with my trailer hooked to the truck. It had rained almost 2 inches since we parked. Several of my friends were getting stuck in the grass campsites as we left the rally. Lowering the tire pressure allowed me to pull out without any wheel spin or getting stock. And I went straight to a hard section of road where my extension cord would teach a 20 amp plug on a pedestal, hooked up my pancake compressor and inflated the tires back to 75 psi.