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 > Dually tire pressure?

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TxGearhead

Texas

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Posted: 06/18/19 04:02pm Link  |  Quote  |  Print  |  Notify Moderator

Ram with the OEM Nexen tires. What's the lowest tire pressure y'all would run? I've had them at 40 and it's a lot more comfortable. Towed the bay boat with maybe 400# tongue weight with no apparent issue. I'm seeing about a 10-15% rise in pressure while on the road. I'm tempted to go down to 38 but wondering if anyone has gone lower.


2018 Ram 3500 CC LB DRW 4X4 Cummins Aisin Laramie Pearl White
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2008 Bigfoot 25C9.4
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the bear II

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Posted: 06/18/19 04:54pm Link  |  Quote  |  Print  |  Notify Moderator

When towing I always use the recommended pressure shown on the sidewall of the tire, manufacturer website or door sticker. Low pressure causes heat and heat kills tires.

towpro

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Posted: 06/18/19 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

I have the same truck.

I run 40 psi empty in the rear. 400 lbs still means empty in my truck [emoticon]
in fact running PA to FL towing a 7x14 V nose with stuff in bed and trailer (moving) I was running around 50 psi in rear. Not a lot of weight, just a lot of junk moving.

with my 990 fully loaded installed on the truck I run 70psi because it felt better.

But mine is 2wd wich takes off about 400 lbs mid ship.


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TxGearhead

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Posted: 06/18/19 05:57pm Link  |  Quote  |  Print  |  Notify Moderator

Yeah with the 5th or the Bigfoot I air them up.
At 65psi it beats me up. Bad streets and 3 back surgeries.
I might dip down into the high 30psi and see how it feels and what kind of pressure they build on the road.
Tow pro....y'all been getting rain? I'd like to get back to Spruce Creek. Was there last fall and it was up and muddy.

Grit dog

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Posted: 06/18/19 07:08pm Link  |  Quote  |  Print  |  Notify Moderator

Running empty or near empty, there’s absolutely no issue with dropping them to 25-30psi.
Think about the weight they’re seeing. 25-30 is the equivalent of 50-60 if you were running single.
Look at a load inflation chart and see what pressure it takes for 1000lbs (x4 = 4000lbs= empty dually). Bet it’s alot lower than that.


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ticki2

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Posted: 06/18/19 08:36pm Link  |  Quote  |  Print  |  Notify Moderator

That might be true for weight but all the tire inflation tables I've seen for duall LT tires start at 35 psi . Perhaps it's for heat buildup .


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rhagfo

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Posted: 06/18/19 10:24pm Link  |  Quote  |  Print  |  Notify Moderator

the bear II wrote:

When towing I always use the recommended pressure shown on the sidewall of the tire, manufacturer website or door sticker. Low pressure causes heat and heat kills tires.


The recommended MAX pressure on the side wall on a DRW is way overinflated for the load they carry! Running 80 psi in DRW is like riding in the Flintston's car with stone wheels. 65 psi is the inflation on my Ram DRW with a 9,700#+ rear axle rating.


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Kayteg1

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Posted: 06/18/19 10:44pm Link  |  Quote  |  Print  |  Notify Moderator

Reputable manufacturers will post chart for your tires what pressure should be applied at certain load.
Rule of thumb is apply the same % of max press that you have % of max load.
I just drove via Oregon scales (the only state I know about that allows you to use the scale on closed station) and turned out I have too low pressure (65) in front, while too much (70) on the rear.
I've never seen more than 10% raise in my tire pressure.
I think higher raise indicate lot of moisture inside the tire.





TxGearhead

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Posted: 06/19/19 05:42am Link  |  Quote  |  Print  |  Notify Moderator

I run 75-80 in front, loaded or unloaded.
I may have some extended interstate running today. I'll lower the rears to 36-38 and see how it acts.

eHoefler

ozark mountains

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Posted: 06/19/19 06:44am Link  |  Quote  |  Print  |  Notify Moderator

Always 80 in the front
40 in the rear except when pulling the 5ver.
I tow a 16' enclosed that weighs in at 6500 always, 24' enclosed race car trailer weighing in around 10k
rotate tires every 7500 miles, all tires wear with in 1/32 of each other

This is my 5th Ram dually, I ran this way with all of them, good ride and wear.

* This post was edited 06/20/19 06:06am by eHoefler *


2019 Ram Limited, 3500, Crew Cab, 1000FTPD of Torgue!, Max Tow, Long bed, 4 x 4, Dually,
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