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Old 02-16-2012, 08:46 AM   #1
ksboy
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Tire Pressure

Hi, I recently purchased a 2012 3500 Dodge Mega Cab Laramie 4x4 and I am new to driving a dually truck. I am wondering what tire pressure I should have in my rear duals, and also what pressure I should have in my front tires. Any advise would be appreciated.

Ray (aka) ksboy
 
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Old 02-16-2012, 08:51 AM   #2
pineranch
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There should be a mfg sticker somewhere inside the drivers door.
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Old 02-16-2012, 09:29 AM   #3
moutard2
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IMHO, I'd inflate the tires to maximum pressure when hauling your trailer. You'll hear and see that this topic is controversial here and in the tire manufacturing world. Your door sticker can best advise you as to pressure when you're not loaded.
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Old 02-16-2012, 09:37 AM   #4
sreigle
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Ray, my Dodge is not a dually nor is it a 2012 but... on the edge of the driver's door is a sticker that lists inflation for "light load" and for "heavy load" or terms to that effect. This is an additional sticker. There's another there somewhere that lists pressure but the one I'm talking about is a separate sticker. You might check yours for that sticker.

I'd think the heavy load inflation pressures is what you want when towing.
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Old 02-16-2012, 09:42 AM   #5
Devildog
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My 2012 3500 mega longhorn states 70 front, 65 on the duals. I currently have them 65 front and 60 on the duals. Just didn't have a chuck to reach the inside dual yet. That is without a load.
I always go to max when towing.
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Old 02-16-2012, 09:53 AM   #6
oldelmer1
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As others have stated, go by the sticker on the door frame.
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Old 02-16-2012, 10:07 AM   #7
1retired06
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When pulling my fifth wheel, I go 80 cold in each tire. Otherwise, per the door sticker
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Old 02-16-2012, 11:00 AM   #8
HOOK
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We have a Chev. 3500 diesel dually. Firestone Transforcetires. If we run pressure at 80 lbs. as suggested on door, they wear in the center, all 6. So I reduced the pressure until wear was even across tread. Happened to be 65. Check for wear, center too high, outer edges too low, adjust until your tires wear evenly across tread. Good luck! Larry
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Old 02-16-2012, 11:43 AM   #9
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Normally, in a dually, the rear tires will have less TP than the front tires. Since there are four of them each has less weight to carry than the front two...thus less TP.
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Old 02-16-2012, 11:53 AM   #10
H. John Kohl
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Ray,
I purchased a tire depth gauge. Originally I was running all front and rear at 80. With the tire tread depth gauge I have noticed crowning in the middle where it is lower depth than the edges so no my front are at 60 and my duals at 55. I claim the tires will tell you what pressure to run.
Best of luck and enjoy that new truck.
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Old 02-16-2012, 12:58 PM   #11
snfexpress
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We have a 2007 GMC 4WD dually. The sticker states 65 psi for rears and 70 for the steers.
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Old 02-16-2012, 02:00 PM   #12
bigmurf
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Have 04 3500 also. 60 in the fronts and 50 in the duals. Last set of Michlins went 85000.
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Old 02-16-2012, 02:46 PM   #13
tracyclifton
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My F350 says 65 front and 60 rear.That's what I always run. If you look at the sidewall of the tires I think they normally list different ratings for single and dual.Remember that 4 tires are carrying the weight in the rear so less pressure per tire is needed. Good luck.
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Old 02-16-2012, 07:29 PM   #14
Art-n-Marge
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I use the recommended pressure for the GVWR on my Ford 4x4 when towing. Even though my towable does not cause me to weigh the GVWR, I use it because with the rough roads and heavy weight pounding on the rear end, I figure the max psi is better than reducing the psi. So far, it must be okay because if it really was too high, the center of the tires would be wearing out, but they're not. I really should measure the depth with a depth gauge to be sure, but I am not too worried yet.

When I'm not towing I use 60 and 65 psi otherwise I'm bouncing around too much especially at higher speeds on these terrible highways and interstates. I recently got a letter from Ford that stated us Ford truck owners should use the max psi at all times because owners have been taking their trucks into service because in 4x4 modes and driving off road it's difficult to steer the truck because the steering wheel gets jerked around a lot. Ford thinks keeping the max psi eliminates the problem according to the letter. I have noticed this when in 4x4 mode and driving ruts and dips off the roads but since I know it's because of the lowered psi, I just tolerate it. There's nothing wrong, it's just not as smooth of driving. Since I don't go very fast offroad, I am not concerned.

Did any other Ford 4x4 owners get this notice? I no longer have it since I'm not concerned.
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Old 02-17-2012, 01:05 AM   #15
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The tires that are now on my truck are Michelins that I bought from my dealer where I bought the truck. Spent a load of money for these tires. I constantly keep an eye on fuel mileage and could not figure out why it had dropped when I put these new tires on. Until I checked the air pressure one day as I always do and, discovered they were all down around 65 psi when they are suppose to be at 80 psi. No wonder the truck was riding nicer and getting less fuel mileage with these new Michelins!! They are suppose to be at 80 psi according to the sidewall of the tire and the sticker inside the door. So, I fired up the air compressor and adjusted all 4 tires to 78 psi. Fuel mileage went back up, ride was about the same but, handling was better. I had suspected that this was happening when the original Generals were on. But, didn't think anything about it, until....

The next service interval came and when I was paying the bill , I noticed on the check sheet that they had adjusted the air pressure in all 4 back to 65 psi. I immediately asked the service manager to come to the cashiers desk, which he did. I asked why the tire pressure was lowered. He stated that they always adjust air pressure up or down to maintain ride on the vehicle. After a very brief conversation it was plain that I would not finish paying the bill until the truck was taken back and all 4 tires were adjusted back up to 78 psi. A few minutes later, the truck came back up front. I went out with the service manger and took out my pressure gage from the glove box and checked all 4 tires while he watched and, they were up to 77 to 78 psi. After another brief discussion as to why these tires will be maintained at about 78 psi and that if I found the pressures down to 65 lbs and fingures will get broken, I went in and finished paying the bill. There was no other customers in ear shot and no screaming done.

This service manager and I get along very well, now. Tell jokes and are cordial to each other. He has stated that since this incident, they have studied this practise and changed their procedures.

So, not only do we have to check on the techs that work on our 5ers but, also on the techs that work on our tow vehicles. It also helps to read the paperwork from the tire manufacturer which, at one point showed to the service manager.
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Old 02-17-2012, 01:39 AM   #16
1retired06
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Hmm. First time for us with dually. I will have to rethink the PSI issue. Good info
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Old 02-18-2012, 02:51 PM   #17
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Quote:
quote:Originally posted by HOOK

We have a Chev. 3500 diesel dually. Firestone Transforcetires. If we run pressure at 80 lbs. as suggested on door, they wear in the center, all 6. So I reduced the pressure until wear was even across tread. Happened to be 65. Check for wear, center too high, outer edges too low, adjust until your tires wear evenly across tread. Good luck! Larry
best advice
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Old 02-18-2012, 03:45 PM   #18
DonandJudy_12
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A few years back, some tire manufacturers suffered a public relations nightmare- Seems the auto manufacturers posted lower tire pressure recommendations that caused numerous tire failures and injuries- This makes for a smoother and softer ride- Great for the vehicle maker- An under inflated tire will build up enough heat to cause a tire failure- I always inflate my tires to the maximum as posted on the tire because the tire manufacturer knows what is best and safest- JMHO- Don
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Old 02-20-2012, 03:43 PM   #19
sgtpp214
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Based on research and a discussion with a retired Michelin regional director who owned the CG we stayed at in Houston, TX in '09 who affirmed my policy of inflating tires based on the tire manufacturer's recommendations. On the Dodge when empty, 50 front, 45 rear. Towing 60 front, 75 rear. I adjust religiously and rotate every other oil change which is about 15,000 miles. Original Michelins replaced at 105,000 miles now have 67,000 miles on replacement Michelins and showing little wear.
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Old 02-21-2012, 01:11 PM   #20
Chip
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Some different info than I have heard before. (run at tire max all the time)

I run as the door sticker says at 70 front 65 rear and rotate often. Original tires with 40,000 miles and even wear.

Will watch this.


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