Reply
 
Thread Tools Display Modes
Old 07-25-2013, 05:22 PM   #1
Senior Member
 
Join Date: Jan 2012
Posts: 119
Cool Dual tire pressure question

Before we departed on Mon for a trip I checked the tire pressure on all the tires. We have a 2013 2860 and according to docs the fronts are 65psi and the dualies are 80psi. I did the fronts to 66.5 and 65.5. The dualies I set at 79.6, 81, driver side, and 80.5 and 79,5 on the passenger side. When we reached our destination just for S&G's I checked the psi on all and got the following..67.4, 66.5, 83.4, 90.5, 84.1, and 91.7. Any idea why the inners have more psi..are they carrying more of the load?

Thanks
__________________

__________________
Wildkats66 is offline   Reply With Quote
Old 07-25-2013, 05:30 PM   #2
Senior Member
 
Oaklevel's Avatar
 
Join Date: Sep 2012
Location: Virginia
Posts: 3,530
Yes the inner tires of the duellys carry more weight.....I found that out on a Chevy 3500 dump truck that I drove as a student worker in the summers at the Junior College......Always put the rears best tires on the inside for that reason........ I made that mistake & found out with a full (very overloaded) load of gravel......... what we did years ago & are still here

__________________

__________________

2005 Dodge 3500 Cummins
2017 Wildwood Lodge 4092 BFL
1966 Mustang GT
1986 Mustang SVO
Sadie & Lillie Spoiled Rotten Boxers
Oaklevel is offline   Reply With Quote
Old 07-25-2013, 05:36 PM   #3
Senior Member
 
Join Date: Jan 2012
Posts: 119
Oaklevel,

So based on your experience do you adjust the 80psi cold to compensate ,or just go with the higher psi since they are carrying more of the load.
__________________
Wildkats66 is offline   Reply With Quote
Old 07-25-2013, 05:55 PM   #4
Senior Member
 
Oaklevel's Avatar
 
Join Date: Sep 2012
Location: Virginia
Posts: 3,530
Quote:
Originally Posted by Wildkats66 View Post
Oaklevel,

So based on your experience do you adjust the 80psi cold to compensate ,or just go with the higher psi since they are carrying more of the load.

Probably not the best answer but I just keep them near equal.... at a little under the PSI the tire is rated at ... I am under the tire & truck weight rating....It will be interesting to see what the tire guys on here have to say....... My front end at last loaded weigh in is only about 700 lbs less than the rear
__________________

2005 Dodge 3500 Cummins
2017 Wildwood Lodge 4092 BFL
1966 Mustang GT
1986 Mustang SVO
Sadie & Lillie Spoiled Rotten Boxers
Oaklevel is offline   Reply With Quote
Old 07-25-2013, 06:25 PM   #5
Senior Member
 
Join Date: Oct 2012
Location: Cobbs Creek, VA
Posts: 201
Could be, but weight carried = f(contact area x tire pressure) and contact area = f(tire depression) so unless the axle flexes the contact area should be the same. Uneven cooling likely the culprit.
__________________
Geri is offline   Reply With Quote
Old 07-25-2013, 07:17 PM   #6
Junior Member
 
Join Date: Jul 2013
Posts: 8
I also agree that setting them the same is best. Uneven heating, or cooling as the case may be, is likely the cause. Even if it really was uneven loading, I'm not sure it would be a reasonable solution to adjust pressures. Less and the tire might heat more, more and it may expand and take more load.
__________________
adaycj is offline   Reply With Quote
Old 07-26-2013, 06:03 AM   #7
Senior Member
 
Join Date: Dec 2011
Location: Collinsville, IL
Posts: 830
The recommended tire pressures are the COLD settings. Get that right and you will be fine. Hot pressures will vary based on a number of conditions, including which side is heated by the sun, plus load etc. a good tire pressure monitoring system is a great addition. You can see pressure and temperature as you travel, and be alerted to abnormal conditions.
__________________
2012 Forest River Sunseeker 2300 Chevy
RvBill3 is offline   Reply With Quote
Old 07-26-2013, 07:29 AM   #8
Senior Member
 
Join Date: Dec 2012
Location: Windsor, Ontario, Canada
Posts: 631
When towing my tires are at 80psi all around including the 5er. When not towing the truck tires are at 50 psi all around. As stated the tires on the sun side will be hotter than those on the shady side. The sunny side pressure will probably be higher than the shady side. My TV is a dually. I do use an IR temp gauge.
__________________
Pipeman is offline   Reply With Quote
Old 07-26-2013, 04:06 PM   #9
Senior Member
 
Join Date: Feb 2012
Posts: 956
Not sure about the inner dually carrying more load. That doesn't make sense to me unless the inner tire is bigger or has more tread. However the inner dually does run hotter than the outer due to less cooling. Heat from the engine and exhaust flows against the inside of the tire and there is reduced cooling to the side wall next to the outer tire. I monitor tire temperatures with an infrared temperature sensor at every stop and my inners always run about 5 degrees hotter than the outers thus the tire pressure is higher. The front tires are the coolest since they get even better cooling than the outer duallies.
__________________
ATVer is offline   Reply With Quote
Old 07-27-2013, 11:16 AM   #10
Junior Member
 
Join Date: Jun 2013
Posts: 29
The inner tire dispensates the heat less than the outer tire that's spinning out in free air.?
__________________

__________________
kittyskeeper is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:32 AM.