[aussiekeeper]

Am expecting delivery of 06 super cab, long bed dually on the 27th of this month.
What tire pressures are correct for unloaded, for front and rear? I looked at the Goodyear chart that someone linked, but it doesn't make any sense to me. Maybe Smokey will save the day here and give his advice. My present 03, 250,cc,sb, tires are wearing in the center, showing to be overinflated. So, for the next truck I want to get it right..........



Ron

 

[SMF]

Good question, how low a pressure in the rear tires is too low? I drop mine down to 28lbs in each when not loaded. When I haul heavy stuff I pump them back up. Helps to have a air compressor in your garage. Even at 28 pounds my outside tread block does not get wet on a wet road. How low is too low? Just part of having a dually.

 

[aussiekeeper]

And your truck is heavier in the rear than mine will be. 28 lbs sounds low, however, there are 4 tires holding the load.........hope someone else has info too, am trying to get many responses. Maybe not that many have duallies.......... /ubbthreads/images/graemlins/shrug.gif


Ron

 

[ericmj]

90psi rear and 75psi front (see sig). /ubbthreads/images/graemlins/smokin.gif

 

[haul_n_horses2]

55 psi front and 45 psi rear.

 

[Shiawassee]

So the sticker on the door post says 60 PSI front and rear. What does that mean?.....if anything?/ubbthreads/images/graemlins/shrug.gif
DR

 

[toalpi]

[ QUOTE ]
So the sticker on the door post says 60 PSI front and rear. What does that mean?.....if anything?/ubbthreads/images/graemlins/shrug.gif
DR

[/ QUOTE ] You can't just take part of the info from the door sticker and run with it. The door sticker also lists the Front GAWR and the Rear GAWR and the GVWR. That info is not there to tell you that you should load the vehicle to it's full capacity every day. You can drive the vehicle "empty". When the vehicle is loaded at or near those maximum numbers, the tire pressures listed would be appropriate. Some car and truck manufacturers do list (in the owners manual) separate inflation pressures for a lightly loaded and a fully loaded vehicle. In order to use the load and inflation tables, the driver or the person performing maintanance on the vehicle must either know or have a rough idea of what each axle acually weighes and will weigh in everyday "normal" use. Most people don't have that info so they can not use the tables. For those that can figure it out, and are willing to bother to do it right, the tables are available. Those that have "big" load changes on a regular basis are probably best served by using pressures for their common "heaviest" load.

 

[SmokeyWren]

On a DRW 4x2 PSD I would go with 50 front and 35 rear unloaded. When loaded heavy, go with the sitcker on the doorpost - 60 all around? Or maybe on a 4x2, 55 front and 60 rear.

The weight on the front axle won't vary much - unless you're using a snowplow. So 50 empty and 60 loaded for bear is a decent range. But the rear tires carry the payload. So 35 empty or with a light load, 60 (over)loaded for bear, and 45 or 50 for lesser of a load.

60 PSI in the rear tires is good for about 9,000 pounds rear axle weight. And when you have 9,000 pounds rear axle weight, you're going to have a little less than 5,000 pounds front axle weight, for a total GVW of almost 14,000 pounds. Or a little overloaded over the 13,000 pounds GVWR of a 2006 DRW.

35 psi on the rear tires is good for over 6,000 pounds rear axle weight. That's over 10,000 pounds GVW, so you can haul a pretty good load without pumping up the rear tires. I wouldn't go below 35 PSI only because that's the bottom number on the tire inflation charts for our truck tires.

 

[tucmoto33]

65 front, (heavy front bumper) 45 rear not loaded.

 

[aussiekeeper]

Thanks to all of you for the input. I just don't want to have to replace 6 tires any time soon.


Ron

 

[Shiawassee]

With 4x2 and V10, my actual weight is about as light as a dually will be. With 1/2 tank of gas, front weighs 3720 and rear 3240, total 6960. I know most 4x4 PSDs run about 7850 or so, so I think I'll try 50 PSI front and 35 rear. I'd go lower in back, but I wonder about breaking the beads.

When I get the slide-in loaded, the boat hung on and people and junk stashed, my guess is that I'll weigh about 12,000-12,500, which will put me comfortably around GVWR. I'll try 60 PSI at first, then get actual weights and adjust.

By the way, it arrived from the factory with 60 PSI all around. Empty, it is a quite comfortable ride at that pressure.
DR