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Old 05-17-2015, 09:22 AM   #1
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How much tire pressure?

So we are picking up the new to us, 2013 3150RL on Wednesday. We are new to having a dually and new to pulling a fifth wheel. So Hubby wants to know what is your recommendation for tire inflation on the rear tires on the dually, at maximum? (I believe is 80#)

We are having upgraded tires installed on the Montana at the dealership, Goodyear G14 I believe. So since these are more than enough for the weight of our trailer what do you think should be the inflation of the tires?
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Old 05-17-2015, 09:42 AM   #2
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Max tire pressure is never a bad thing for the tires. I think most people run their rear truck tires at about 65 pounds. The higher the pressure the more weight a tire can carry safely.
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Old 05-17-2015, 10:03 AM   #3
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You will get many opinions on tire pressures. FWIW we run the duallys at 80# when towing, and 60# when not. Improves the ride. Fronts always at 66#. All per spec sheet on truck door jamb. (08 Silverado 3500) Also have G614's on 06 3400RL. Run them at 100#. Many run them at max pressure - 110#. Enjoy your new rig and be sure to ask, there is much to learn and no such thing as a dumb question here.

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Old 05-17-2015, 11:15 AM   #4
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As much as the tire say
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Old 05-17-2015, 11:47 AM   #5
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Weun 80 all around when towing, and door plate pressures balance of the time.
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Old 05-17-2015, 11:57 AM   #6
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The pressure posted on your vehicle's door and the max on the tire are both safe. We've found that driving with the tire max, we get better fuel mileage, but the ride is much harsher with the stiff springs in our F350. Just the opposite with using the door pressure.
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Old 05-17-2015, 02:21 PM   #7
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The safest and most logical thing to do is follow the directions in your vehicle's owner's manual.

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Old 05-17-2015, 02:49 PM   #8
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We split the difference on the truck. Door says 60 (but they're more interested in smooth ride), tires say 80 and we run 70 on all four. Run between 105 and 110 on the trailer tires.
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Old 05-17-2015, 03:03 PM   #9
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I do the same as DQDick on both the TV and the Monte! Since I have a single tire 1 ton TV, I normally run the rear tires at between 75 and 80 on the truck when towing the "Beast" and between 105 and 110 on the Monte since I also have the G614s!

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Old 05-17-2015, 07:09 PM   #10
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I have a 2012 Chevy 3500HD Dually and a 2012 3750FL. This is also my first dually and camper. I use the MFG recommended cold tire pressures and tire size that are on the door jamb sticker.70# in the fronts and 65# in the rears. You can experiment with higher pressures to give you the ride quality and fuel mileage you want. The MFG pressures and tire size listed on the sticker are good up to the max gross vehicle weight. So unless you want to you don't have to change your pressure based on weight.
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Old 05-18-2015, 01:46 AM   #11
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What your owners manual/door sticker says. I get the best ride and handling using what the manual/door sticker recommends. I'm referring to a dually. SRW, I always bumped the rear tires up to max tire pressure that the tire is rated for when towing.
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Old 05-18-2015, 03:24 AM   #12
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Obviously everyone is not on the same page, but pretty close. I have a SRW on the truck. Run 78 in the rear tires and 72 in the front. If I am letting the Monte sit for a month or more I will lower truck pressures to door sticker.

With the G614 I was running at 95 but recently raised them to 100.
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Old 05-19-2015, 05:24 PM   #13
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g614s should be 110 pounds.

your truck, read the door sticker
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Old 05-27-2015, 02:48 PM   #14
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Don't guess at the required pressure. Weight your rig and find out the weight your tires are carrying. Go to the manufacture's web site and you will find a weight chart. The chart will tell you how much air is required for a specific weight.

When you take your rig to the scales make sure it loaded with everything you will be taking on the road, even the passenger.

The two major reasons for tire failures is excess weight and excess speed.
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Old 05-27-2015, 03:58 PM   #15
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Here is a reference to take to the scales with you.


When contemplating tire inflation pressure changes this is a good reference to fall back on. Notice that it clearly says to NEVER use less inflation pressure than what is recommended on the tire placard.

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Old 06-03-2015, 08:39 PM   #16
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I use 80 psi on the trailer because that is what the docs say whether I am at max weight or not. For my TV I go by its docs too, and it states max of 75psi even though the tires sidewall states max is at 80. I used to deflate the truck's tires when not towing but after the third tire separation (replaced under warranty), I stopped deflating them and always use 75 in the rear and 65 in the front, per the book. The good news is that with 3 tire separations and using the spare, I am running on pretty new tires all around, but I wouldn't recommend this is the way to go. Keeping track of the tire ages is real tricky now, but at least there hasn't been any more tire separation. I did not expect this behavior with my Michelins.
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Old 06-05-2015, 12:02 PM   #17
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The tires should be inflated to carry the load that is on them...not max, not min...what they are carrying.
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Old 06-16-2015, 04:40 AM   #18
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I have a '12 Ram 3500 DRW. Tow basically the same trailer. '14 3150RL

I run 55-60psi in the rear's and 75psi in the fronts. If you try and run 80psi in the back you will beat your self to death and wear the center of the tire. That is way overinflated

The door jam sticker shows the tire pressure for the axle at it's max gross load rating. The front will be pretty close, but the back axle load will be no where close to it's max load.

80 front and back is what is on the side of the tire as max inflation pressure. That is NOT what you need to run in the tires. Proper inflation pressures can only be determined by weighing the truck and trailer and then looking at the tire makers inflation charts.

I have determined my inflation requirements by weighing both the truck and trailer hooked up.


2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's
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Old 07-03-2015, 04:19 AM   #19
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I agree with Jim.... I have what's on the door which I thought was 65 lbs....that is for carrying max load....don't know of many pins over 3000 lbs. The trailer is maxed out at 80 lbs..... Running with more then need psi you will end up wearing the center of your tires....Got to remember these are NOT Marathons...lol lol lol
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