HD truck tire pressure when empty

[estesbubba]

I picked up my Ram 3500 SRW yesterday morning and of course it's been raining ever since. Good news is I've had a lot of time reading all the manuals, watching DVD, and sitting inside customizing it. I will say the customizeable dashboard is way cool!

The tires came from the factory at 70 PSI. The door sticker says 65 front and 80 rear which I'm guessing is full load. My 2006 Dodge had both empty and full loaded PSI but this new truck doesn't.

What do you guys set your trucks PSI at for empty driving? I thought about 65 all around, maybe even less in the rears.

So far this truck is smoother than my 2006 2500 on average to good roads but once you hit a bad road it's a little rougher.

[Grit_dog]

estesbubba wrote:

Grit dog wrote:
I just bought those tires and wheels for my Dodge. Running 40 rear and 50 front, good ride quality empty.
Warning you will have to get your TPMS threshold reprogrammed in order to run lower pressure without the idiot light coming on. It will come on a little below 70 for the rears.

Do you have a 2500? From what I've read it seems the 2500 has TPMS and the 3500 has TPIS and doesn't warn you. I guess I'll find out as I just set my rears to 50.

I have an early 07, so no pressure monitoring. Just bought the new takeoff wheels.
I did have a fleet of '14-15 Ram diesels in AK for the last yr though and the new trucks do not have the light load setting like the older 6.7s.
With the huge temperature swings it was not uncommon to see the low pressure light on at -40deg and then have it turn off after driving or warmer temps.
My work truck was a '14 2500 and I was able to program the threshold pressure down with the Witech dealer diag software I had. Pretty sure the 3500s were the same, remember seeing a lot of tire lights and most of the trucks were 3500s

[Mickey_D]

I have the same tires and wheels and just leave them at 75 psi. The ride might be a little stiffer but I tow enough to just leave them. The one thing that did help the ride a lot was adding a couple of hundred pounds to the front end with a bumper replacement. Keeps deer out of the grill, braille drivers away from the front end, and makes idiots think twice before changing lanes into the front of the truck.

[estesbubba]

65 front 50 rear made a big difference over 75 all around. Also happy truck didn't warn about the lower pressures.

[Cummins12V98]

NC Hauler wrote:
What does the placard on your door jamb say to run the tires at? I air mine to what the door placard shows to run them at and I've had zero issues and tires are fine....My door jamb placard for the General Ameritrack tires is 80 psi in the fronts and 65 psi in the rears....empty or loaded.....That's where I keep it and General/Continental agrees...

Hate to disagree with my "right side" buddy but those numbers are to support the MAX load the truck is rated for. Your tires will hast longer if you reduce the rear tires to 40-45psi. If you look at the tire/weight inflation charts add 5psi you will be right at 80 and 65.

At least you don't run 80 psi on all 6!

I agree in the owners manual it says to run the psi recommended at all times on the label. But hitch makers say to do a pull test every time also. Both of those statements are CYA!

They don't want to be sued if you had your pressure lower and caused an accident with a big load and have a blowout.

They are being so stupid with their ratings the SRW trucks are recommended to run 80 on the rear tires all the time.

[nevadanick]

I have 2015 2500, changed the tires to Toyo M55 the first week and run 55lbs fand r empty truck but have had 1500 lbs in the back and still ran 55lbs

[The_Mad_Norsky]

Do remember the diesel engine weight up front.

The front tires should be maintained at a good pressure, helps reduce wear.

Rears can be adjusted lower with no load.

[estesbubba]

Grit dog wrote:
I just bought those tires and wheels for my Dodge. Running 40 rear and 50 front, good ride quality empty.
Warning you will have to get your TPMS threshold reprogrammed in order to run lower pressure without the idiot light coming on. It will come on a little below 70 for the rears.

Do you have a 2500? From what I've read it seems the 2500 has TPMS and the 3500 has TPIS and doesn't warn you. I guess I'll find out as I just set my rears to 50.

[NC_Hauler]

What does the placard on your door jamb say to run the tires at? I air mine to what the door placard shows to run them at and I've had zero issues and tires are fine....My door jamb placard for the General Ameritrack tires is 80 psi in the fronts and 65 psi in the rears....empty or loaded.....That's where I keep it and General/Continental agrees...

[Cummins12V98]

I would run my 98 2500 4X4 at 72 front all the time 45 rear solo 80 rear towing. Rotate about every 15K and easily hit 120K with Michelins.

Most people overinflate the rears and under inflate the fronts!

[campigloo]

2012 ram 2500. 65 fronts/50 rear. When towing 65fronts/70 rear.

[Old-Biscuit]

Have a '07 Dodge 3500 SRW

Run fronts at 65# all the time
Run rears at 45# empty and 80# towing

Even wear across tire

[rhagfo]

So much for looking at the inflation charts!
45 psi to 50 psi empty about 3,000# on rear empty. One tire at Max 80 psi would carry that so that is why 45 to 50 is correct. Fully loses I see about 5,500 on the rear so run about 65 to 70 psi. It is not so much about wear as traction.

[Need-A-Vacation]

Bubba,

Truck looks great!!! Don't forget to update your truck info!!!

Did Ram remove the empty load setting for the tpms??? Buddy has a '13- 2500 and he can change the tpms between light and heavy load settings. Door sticker even shows the empty load psi along with the heavy load psi if I remember right.

I try to run empty about 55-56 front, 62ish rear. Just above what the idiot light low setting is.

[jalichty]

My 2500HD D/A combo suggests 60 in the front and 70 in the rear and that's what I do, whether towing or not.