Ram 3500 DRW tire pressure

[Rangerman40]

So I just upgraded from a 26ft tow behind at 5500lb to a 40ft fifth wheel that comes in at 13400 empty. I usually run 80psi all around. Does that need to change with the addition of the fifth wheel? Pin weight is advertised as 2600ish dry. I haven't picked it up yet so it hasn't been on the scales yet.

[Cummins12V98]

Me Again wrote:
Cummins12V98 advises run the newer RAM dually front tires at 80 all the time. Rears can be aired down to mid 30 to improve the ride empty. What does the door sticker state for full load? Should be around 65 pounds for the rear. Chris

I run 80 ALL THE TIME on fronts per door jamb. 4wd Cummins and Aisin add up!

I run 35 solo. Plenty of capacity. With full RAWR 9,750# I run 65 rear per door sticker. With the ops lighter pin I would know loaded rear tire weights and use weight inflation chart plus 5psi. I'm betting 55-60 psi will be more than enough.

[tinner12002]

rhagfo wrote:

tinner12002 wrote:
Check your door it has recommended pressures to run. Personally I run 70 in fronts and 65 in duals even when towing.

You do relize that those pressure are for "Max Payload" less should be less pressure. You truck will ride better, tires will wear better, and better traction wet and dry.

Yes I realize that...guess I should rephrase that, door sticker has max load recommended pressures, I run 70 on fronts which is 10 under max and I run 65 in duals which is at max recommended pressure.

[rhagfo]

tinner12002 wrote:
Check your door it has recommended pressures to run. Personally I run 70 in fronts and 65 in duals even when towing.

You do relize that those pressure are for "Max Payload" less should be less pressure. You truck will ride better, tires will wear better, and better traction wet and dry.

[Grit_dog]

tinner12002 wrote:
Check your door it has recommended pressures to run. Personally I run 70 in fronts and 65 in duals even when towing.

Use the door panel sticker to......I dunno. That's a generic recommendation for the OE tires the truck rolled off the line with.
If you're lost on what pressure to run (which you are if you're running 70-75 psi rear duals pulling a smallish trailer around) then use some weight/inflation tables.
You'll see the trend, more psi for more weight and vice versa.
Note this isn't gospel either. Millions of vehicles running around without ideal tire pressure and they're not really worse for the wear. Even mfgs spec pressures far to high for the vehicles and get away with it.
I prefer to adjust tire pressure to the load or road conditions. (Within reason)

[Boxer_Lovers]

Door sticker loaded inflation on my 2012 is 65 rears and 70 p.s.i front. Run that empty or loaded. Seeing uneven wear on outside dual with 35,000 miles. More wear in middle of the tread which indicates I'm over inflated.

[tinner12002]

Check your door it has recommended pressures to run. Personally I run 70 in fronts and 65 in duals even when towing.

[southernsky]

My 2011 Ram calls for 65 rear and 70 fronts. That's were I've been running them with my trailer since I bought it.

[johntank]

gwalter wrote:
I run 55 in rear and 70 in front. This is well within my tire rating and have had no problems in 6 years.

We are close to the same pressures I run 75 front and 55 rears, been doing it this way about 20 years and get even wear across tread of tires.

[gwalter]

I run 55 in rear and 70 in front. This is well within my tire rating and have had no problems in 6 years.

[Me_Again]

Cummins12V98 advises run the newer RAM dually front tires at 80 all the time. Rears can be aired down to mid 30 to improve the ride empty. What does the door sticker state for full load? Should be around 65 pounds for the rear. Chris

[rhagfo]

Rangerman40 wrote:
It's a 2015 3500 DRW. Payload if I remember correctly is 58xx.

And before someone asks.... It's a MegaCab which is why the payload is so low for a DRW.

Payload is 5,800# or so and even at 16,000# GVWR for the 5er is 3,200# well under the Max Payload of the TV, Look at the yellow sticker, that is tire PSI for MAX payload, if it shows 65 pst you might look at running the rears at 55 to 60 psi and the fronts at 65 psi.

Look at the tire side wall an what is the MAX weight rating at 80 psi? Keep in mind you have four tires supporting that weight, if your empty rear axles weight is even 3,500# and the pin is 3,200# total is 6,700#. That means 6,700# / 4 = 1,675# per tire, so even de-rated to 2,500# per tire dual each tire is carrying 900# LESS than rated for at 80 psi, making the tire over inflated for the load carried.

At 80 psi inflation with the assumed load your tires look like the profile on the right side of the picture.

[Rangerman40]

It's a 2015 3500 DRW. Payload if I remember correctly is 58xx.

And before someone asks.... It's a MegaCab which is why the payload is so low for a DRW.

[rhagfo]

Rangerman40 wrote:
Well I guess I'm not at 80 all around.... Fronts are 80 and rears are 70-75.

What year and what is the GVWR and rear GAWR? If newer than 2006, what does the Payload (Yellow) sticker call for for MAX payload.

I feel that you are running your tires over inflated for the load carried, resulting in loss of traction both for getting going and braking.

[rtz549]

The more air; the more weight they can handle. B-52 tires are aired up to like 450psi. Look how much that thing weighs when loaded and how many tires it has.



I'd run them at max psi. Other wise; is X pressure enough and correct?

Chance for a blow out or no chance?