Reply
 
Thread Tools Display Modes
Old 03-18-2018, 06:53 PM   #1
Senior Member
 
dlfishing's Avatar
 
Join Date: Dec 2016
Location: Lafayette, LA
Posts: 488
Tire pressure settings

In another forum topic someone replied to my comment about using 80psi in my DX3 by saying I should fill them to the max rated...on my Michelin tires I think the max is 110 psi.
I have always utilized the tire manufacturers charts to pressure up my RV tires.
At a FMCA rally both Cummins rep and Freightliner rep said the same thing that I have always done. Attached is a copy of a page from the handout that was provided by Freightliner
Click image for larger version

Name:	IMG_1536.jpg
Views:	121
Size:	279.4 KB
ID:	165581
__________________

__________________
dlfishing is offline   Reply With Quote
Old 03-18-2018, 06:57 PM   #2
Senior Member
 
halla's Avatar
 
Join Date: Mar 2015
Location: Akron, OH
Posts: 1,472
do you use 80psi all around or just on the front?
__________________

__________________
2018 Dynamax Force HD BH---Just Rite-2
halla is offline   Reply With Quote
Old 03-18-2018, 07:03 PM   #3
Senior Member
 
dlfishing's Avatar
 
Join Date: Dec 2016
Location: Lafayette, LA
Posts: 488
Quote:
Originally Posted by halla View Post
do you use 80psi all around or just on the front?


Since my weight distribution seems to be nearly the same on all tires, I had it weighed on a truck scale, I use the same on all tires.
I only know the total weight on each axel, I would like to one day to weigh the tires individually to see if the left and right are the same.
I had my RV fully fueled and loaded for a trip when I weighed it.
__________________
dlfishing is offline   Reply With Quote
Old 03-18-2018, 07:08 PM   #4
Senior Member
 
halla's Avatar
 
Join Date: Mar 2015
Location: Akron, OH
Posts: 1,472
cool, probably rides better at 80 than 110
__________________
2018 Dynamax Force HD BH---Just Rite-2
halla is offline   Reply With Quote
Old 03-18-2018, 07:23 PM   #5
Senior Member
 
dlfishing's Avatar
 
Join Date: Dec 2016
Location: Lafayette, LA
Posts: 488
Quote:
Originally Posted by halla View Post
cool, probably rides better at 80 than 110


Yes, it does ride better.
I had my RV serviced at a truck repair shop and they were ‘NICE’ enough to fill all my tires to 110psi. Drove my tire monitor crazy until
I corrected the pressures. So I was able to feel the difference.
__________________
dlfishing is offline   Reply With Quote
Old 03-18-2018, 08:04 PM   #6
Senior Member
 
Webefine's Avatar
 
Join Date: Oct 2016
Posts: 175
This has come up before, I agree with Dl 100%. You should have your rig weighed when fully loaded and set the air in your tires according to the manufacturer guide. Not only will it ride better but you should get better tire life, even though RVers with rigs like ours rarely wear tires out they just get old.
This isn't just a truck thing. Most car tires have a higher max pressure rating than what the door sticker says, this is because the manufacturer of that vehicle has determined that the pressure on the door sticker is what the tires need for the max weight of the car.
__________________
Webefine is offline   Reply With Quote
Old 03-19-2018, 11:14 AM   #7
Senior Member
 
RV Randy's Avatar
 
Join Date: Aug 2017
Posts: 332
Quote:
Originally Posted by dlfishing View Post
In another forum topic someone replied to my comment about using 80psi in my DX3 by saying I should fill them to the max rated...on my Michelin tires I think the max is 110 psi.
I have always utilized the tire manufacturers charts to pressure up my RV tires.
At a FMCA rally both Cummins rep and Freightliner rep said the same thing that I have always done. Attached is a copy of a page from the handout that was provided by Freightliner
Attachment 165581
I agree, I would never just fill a tire to the maximum pressure. But in addition to loaded axle weight, you also need to consider impacts to handling. If you are loaded lightly and like the softer ride at 80 psi, that's OK. But the softer setting could also increase sidewall roll and leaning when cornering or when encountering stiff cross winds. With a leaf sprung front axle this can cause chassis steering. If you aren't happy with the lean and steering wheel movement you get in cross winds, trying bumping up your psi 5 psi at a time (all tires) to see if you get an improvement so you can find a happy median.
__________________


Randy & Dee
2018 DX3 37TS
"Orange Crush"
RV Randy is offline   Reply With Quote
Old 03-19-2018, 11:39 AM   #8
Senior Member
 
dlfishing's Avatar
 
Join Date: Dec 2016
Location: Lafayette, LA
Posts: 488
Wouldn’t you think the tire manufacturer takes all that in consideration!
__________________
dlfishing is offline   Reply With Quote
Old 03-19-2018, 12:46 PM   #9
Senior Member
 
Bill Davis's Avatar
 
Join Date: Aug 2017
Location: Marysville, Ohio
Posts: 213
Quote:
Originally Posted by dlfishing View Post
Wouldn’t you think the tire manufacturer takes all that in consideration!
If you read what's on the tire it says what the maximum pressure is allowed on a cold tire. It doesn't know what vehicle it is installed on. Always use the manufacturers recommend pressure, never the max.
__________________
Bill Davis is online now   Reply With Quote
Old 03-19-2018, 01:06 PM   #10
Member
 
hook47's Avatar
 
Join Date: Sep 2017
Posts: 97
When contemplating a diesel pusher I was interested in the tire pressure issue from that segment of the RV'ing world. Not positive, too lazy to try and find it again, but I think Lazy Days had an interesting tutorial on this subject. IIRC if you couldn't weigh each tire individually, weigh the axle and divide by number of tires. Check the tire manufacturer's site for proper psi and add 5 psi to compensate for unequal loading.

Like I said, If I Remember Correctly..
__________________

__________________
hook47 is offline   Reply With Quote
Reply

Tags
pressure, tire

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



» Featured 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 06:29 AM.