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08-20-2018, 08:10 AM
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#1
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Montana Fan
Join Date: Apr 2013
Location: Lehigh Acres
Posts: 492
M.O.C. #13354
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Tire Pressure on Tow Vehicle
I search the forum, and did not find the answer I was looking for.
I have a Ford F350 dually.
The placard on the door says to inflate to 60 psi.
I have Michelin tires and the sidewalls permit psi up to 80 psi.
With the weight we are towing, should I increase the psi in my tow vehicle?
If I just asked a stupid question, feel free to slap me online, if you are going to the 2018 rally, you can slap me there!
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08-20-2018, 08:50 AM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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On my Dodge SRW I run them close to the max.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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08-20-2018, 08:55 AM
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#3
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,558
M.O.C. #2283
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60 pounds in your tires is just fine. Single wheel trucks probably need the 80 pounds listed on the tires but your duel wheels don’t need that much pressure.
Lynwood
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08-20-2018, 11:02 AM
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#4
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Seasoned Camper
Join Date: Mar 2018
Location: Stark City
Posts: 89
M.O.C. #21339
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I run my Michelin's at 80 psi on the rear and 72 psi on the front while towing. During periods while we will not be using the Montana run them at 60 psi all the way around.
__________________
Indian Springs Farm
2018 3121RL Samsung Residential Fridge
2018 Ford F250 PSD Air Lift 5000
Sailun 637 tires Predator 3500 (2) paralleled
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08-20-2018, 11:28 AM
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#5
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Montana Master
Join Date: May 2018
Location: livingston,tx
Posts: 558
M.O.C. #21685
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2017 F-350 dually, door sticker says 70 front 65 back cold. We pull a 3790RD 40' rig, 11 months full time moving every other week and traveling 2-300 miles at a time, we have had no abnormal wear. Once on the road, tires come up 5-8 psi front and rear. Rig psi 110 cold and once on the road they come up about 10 psi with no abnormal wear.
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08-20-2018, 12:50 PM
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#6
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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80 all around. Yes, hard ride.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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08-21-2018, 07:03 AM
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#7
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Montana Master
Join Date: Mar 2012
Location: Davison
Posts: 786
M.O.C. #12331
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That sticker has the factory pressures for factory supplied tires. It's not there to inform of the best inflation for comfort, it's for maximum load rating. If the original tires were the same model Michelins, the sticker would still apply. If not, it doesn't. No need to put more thought than is needed into this equation: Go by what is on the tire sidewall. It will have both dual and single max tire inflation and load ratings. If you go by the truck sticker and you're wrong you could have a problem. If you go by the tire label, you certainly won't hurt the truck.
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08-21-2018, 08:57 AM
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#8
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Montana Fan
Join Date: Apr 2013
Location: Lehigh Acres
Posts: 492
M.O.C. #13354
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Quote:
Originally Posted by bethandkevin
That sticker has the factory pressures for factory supplied tires. It's not there to inform of the best inflation for comfort, it's for maximum load rating. If the original tires were the same model Michelins, the sticker would still apply. If not, it doesn't. No need to put more thought than is needed into this equation: Go by what is on the tire sidewall. It will have both dual and single max tire inflation and load ratings. If you go by the truck sticker and you're wrong you could have a problem. If you go by the tire label, you certainly won't hurt the truck.
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Thanks, kind of what I was thinking.
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08-21-2018, 09:31 AM
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#9
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Montana Master
Join Date: May 2010
Location: Rock Island
Posts: 1,074
M.O.C. #10457
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On our 2012 F350 Dually we keep the pressure as directed on the door and got 64,000 out of the first set of tires with even wear, in 2017 we traded the truck at 107,000 with second set of six good condition tires. Here on the farm we temporarily put in higher pressure when moving very heavy loads. The recommendations on the door are most likely based on best-practices for general use.
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08-21-2018, 10:34 PM
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#10
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,956
M.O.C. #5651
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I think my old truck had a rear axle weight of something like 6080. It was exactly the limit on the two tires on the axle! I think I had to run 80# in them too.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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08-27-2018, 01:32 AM
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#11
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Montana Fan
Join Date: Mar 2011
Location: gresham
Posts: 489
M.O.C. #11202
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Find the "Load & Inflation Tables" for your particular brand, model, rating, and size of tire.
It will tell you exactly how many PSI that you need for the amount of weight supported by each tire. I keep a copy of mine in the truck.
Where I live, you can use the states roadside commercial truck scales to weigh your rig for free when they are closed, and at least a couple times a year I will weigh the truck and 5er when fully loaded. Then, whenever we go on a trip, I already know the weights and I can adjust the tire pressures to what they need to be.
For the truck, I adjust the PSI to whichever tire (left or right) has the heaviest load to the same pressure in both tires for that axle. The front and rear axles will have different pressures, but tires on the same axle should be set to the same PSI.
On the 5er, I weigh each tire on its own, find the correct PSI, and then set all four tires at the same pressure to that of the heaviest individual tire load.
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09-02-2018, 01:38 PM
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#12
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Established Member
Join Date: Aug 2013
Location: austin
Posts: 27
M.O.C. #13656
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80psi in the rear on a dually is like riding on square wheels...
my dually says 60 on the door placard for MAX load (9000 lbs rear axle).. and I am not even close to that. i run 72/60.
on the scales the rear axle was less than 7000 with the trailer
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