REAR DUALLY TIRE PRESSURE

[johncamtravel]

I have a 2013 3900FB and towing with a 2011 Ram 3500 dually.
I was wondering what most of you are airing your rear tires at??
I have the Mor/Ryde Pin Box but it still feels like a harsh ride in
the rear especially on rough roads. I have been using 70LBS in the
front and 65LBS in the rear tires. I have 5,100LBS of weight on the front axle and 7,100LBS of weight on the rear axle. Any help would be appreciated.

[Irlpguy]

The tire sticker on the door of my 2012 Ram 3500 dually says to inflate the front tires to 70 psi for max load and the rear to 65 psi for max load. I run my fronts at 65 and the rear at 60. 5 lbs will make a fair difference to the roughness you feel all around. I would reduce them to 65 and 60 and see if there is any difference.

I have had no problems in over 6000 miles of towing with the new truck, tires are not overheating and wear is normal. If it were me I would reduce both the front and rear pressures

The scaled weight on my axles ready to roll was 5026 lbs front and 6657 lbs on the rear. I am somewhat lighter in both cases but not much.

Some will perhaps offer other advise based on their experience, it is then up to you to decide.

[K0LCB]

I run my 2009 Dodge at 65 psi all around

[mobilcastle]

Check your tire load rating for your tires and match it to your axle load. My Michelin's run at a much lower pressure based on axle load. The door rating is for max axle load.

[1retired06]

65 front and rear

[Denfinger]

65 front and rear but the ride really became better when we added our Air Lift shocks in the rear which keeps you from always using stiff springs and bottoming out on bumps. If you are not happy at any PSI on tires, the air shock of any major brand is recommended. Well worth tthe ride investment.

[dieselguy]

I have an older dually that I run Hercules tires on. The sticker says 60# all the way around. I run 60# in the front and 55# in the duals. The tread wear is even across the full tread ... if I bump it up to 60#, the duals wear faster in the center and my teeth chatter more.

[Recumbent]

May be apples to oranges, but we have a good ride, and our OEM sticker calls for 75 in front and 65 in back. When we take it for service Ford puts in about 70 in front and about 60 in back, always check and change it back/add air. We rotate the tires every third service. The inside rear tires will go to front on next service.

[jswharton]

How do you rotate your tires on the Ford? On my 011 the rims are different, o you physically remove the tire and remount in a different position?

[Rspradling]

E rated tires should be ran at the pressure they are designed for and i believe that is 80 psi(cold). full load.. anything short of that you will lose gas mileage..

[dieselguy]

Pulling an RV and fuel mileage just can't be combined in the same sentence. If I bump my E rated tires up to 80#, my truck gets just plain "squirrely" on the road as in darting to each and every high or low spot on the pavement. Yes ... it is aligned. The pressure indicated on a tire is the max inflation pressure per manufacturer not what you need to run on your particular vehicle.

[Montana Sky]

I run mine at 65 lbs all the way around all the time towing or empty.

[johncamtravel]

Thanks for the replies. I think denfinger might have a good idea with the rear air bags. I just ordered them. I didn't realize they ere only
a little over $300.00 and quite easy to install. I ordered them yesterday and hope to have by Tues or Wed. When I get them installed I will keep you all posted.

[Recumbent]

jswarton you are right, the inside rear rim is not polished. It will have to be side to side for the DRW. The next service will be the second rotation, and previously rotated front to back outside. Sure wish all six wheels were the same.

[HOOK]

We have Firestone Transforce and run all 6 at 50psi. This after adjusting up and down to get best wear. Seems to be right for us, good wear, good ride.

[jlb27537]

2012 Ram 3500 DRW, 70psi front, 55psi rear. Loaded truck weight is 4,780lbs front, 6,440lbs rear.

Per the tire load chart I should be running 55psi in the front and 40psi in the rear loaded. 235/80R17 tires

Jim