Good Sam Club Open Roads Forum: Fifth-Wheels: Tires and their pressures
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Fifth-Wheels

Open Roads Forum  >  Fifth-Wheels

 > Tires and their pressures

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
phillyg

SWFL

Senior Member

Joined: 04/24/2002

View Profile



Good Sam RV Club Member

Offline
Posted: 07/26/21 12:11pm Link  |  Quote  |  Print  |  Notify Moderator

As I understand it, the truck mfgr. sets the tire pressure to the maximum load the rear axle can carry, which is not always the max psi set by the tire mfgr. I don't think your FW has more than a 2900lb pin weight, so 75psi on an E-rated tire (without looking at a load chart) is probably about right.


--2005 Ford F350 Lariat Crewcab 6.0, 4x4, 3.73 rear
--2016 Montana 3711FL, 40'
--2014 Wildcat 327CK, 38' SOLD

azdryheat

Tucson, AZ

Senior Member

Joined: 03/02/2012

View Profile



Good Sam RV Club Member

Offline
Posted: 07/26/21 06:21pm Link  |  Quote  |  Print  |  Notify Moderator

You need better tires. Try Michelins.


2013 Chevy 3500HD CC dually
2014 Voltage 3600 toy hauler
2019 RZR 1000XP TRE


JIMNLIN

Oklahoma

Senior Member

Joined: 09/14/2003

View Profile



Posted: 07/26/21 08:29pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like under pressure and/or over loaded tire issues.
AS suggested drop by a set of CAT scales and get your trucks separate axle weights.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides

memtb

Wyoming

Senior Member

Joined: 10/21/2006

View Profile



Good Sam RV Club Member


Posted: 07/28/21 03:24pm Link  |  Quote  |  Print  |  Notify Moderator

The vehicle manufacturers (virtually all manufacturers) put the tire pressure recommendations on the door sticker for ride comfort. The manufacturers compete for best ride, soft tires help in this aspect. It is up to the vehicle owner to adjust tire pressure according to his/her needs! memtb


Todd & Marianne
Miniature Schnauzer's - Sundai, Nellie & Maggie Mae
2007 Dodge Ram 3500, 6.7 Cummins, 6 speed manual, 3.73 ratio, 4x4
2004 Teton Grand Freedom, 39'
2007 Bigfoot 30MH26Sl


jrichard

Sacramento

Full Member

Joined: 03/22/2008

View Profile


Offline
Posted: 08/03/21 09:49am Link  |  Quote  |  Print  |  Notify Moderator

Most tire shops and service centers go by the door sticker--and it's a bad idea because it doesn't take into account your actual load and whether you've switched from P-metric to LT (surprisingly, LT tires require more pressure than P-metric for a given load).

The Tire and Rim Association sets the standards you're looking for.

Look here for the inflation / load values for your particular size and type of tire:

https://tirepressure.com/tire-sizes

or

https://www1.prodemand.com/Content/Pdf/tg_passenger_load_inflation_tables.pdf

laknox

Arizona

Senior Member

Joined: 01/06/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 08/03/21 10:22am Link  |  Quote  |  Print  |  Notify Moderator

memtb wrote:

The vehicle manufacturers (virtually all manufacturers) put the tire pressure recommendations on the door sticker for ride comfort. The manufacturers compete for best ride, soft tires help in this aspect. It is up to the vehicle owner to adjust tire pressure according to his/her needs! memtb


Which is exactly why Ford got their gonads in a vice with their OEM Firestones about 20 years ago. Putting =whatever= tires on Explorers and Expeditions and had the tires placarded for only 28 lbs. Then they wonder why tires were exploding and they were rolling. Had I had one, I'd've said to inflate to sidewall pressure and F the placard.

Lyle


2002 GMC Sierra 2500 HD Duramax Crew Cab 4x4 6.5' Bed
B&W Turnover Ball with 5th Wheel Companion
2017 KZ Durango 1500 D277RLT
1936 John Deere Model A
International Flying Farmers 63 Year Member

TxGearhead

Texas

Senior Member

Joined: 04/17/2016

View Profile



Good Sam RV Club Member

Offline
Posted: 08/03/21 11:24am Link  |  Quote  |  Print  |  Notify Moderator

Ideally you should know your weight loaded and unloaded on your truck axles, and air them to the tire manufacturers load chart, assuming you can find one. The numbers on your yellow tag have nothing to do with ride comfort, they represent the max load that axle with those sized tires at that pressure is rated for.
If you change brands of tires that are the same load range and the same size as OEM that yellow tag is still valid.


2018 Ram 3500 CC LB DRW 4X4 Cummins Aisin Laramie Pearl White
2018 Landmark Oshkosh
2008 Bigfoot 25C9.4
2014 NauticStar 21 ShallowBay 150HP Yamaha
2016 GoDevil 18X44 35HP Surface Drive

Cummins12V98

on the road

Senior Member

Joined: 06/03/2012

View Profile


Offline
Posted: 08/03/21 11:13pm Link  |  Quote  |  Print  |  Notify Moderator

"Ideally you should know your weight loaded and unloaded on your truck axles, and air them to the tire manufacturers load chart"

For God's sake Margaret, you really should not be spewing all that common sense nonsense.

* This post was edited 08/04/21 07:24am by Cummins12V98 *


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

ford truck guy

Pennsylvania

Senior Member

Joined: 03/22/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 08/04/21 06:17am Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

"Ideally you should know your weight loaded and unloaded on your truck axles, and air them to the tire manufacturers load chart"

For God's sake Margaret, you really should not be spewing all that cannon sense nonsense.



[emoticon] [emoticon] [emoticon] [emoticon] [emoticon]


Me-Her-the kids
2020 Ford F350 SD 6.7
2020 Redwood 3991RD Garnet


CALandLIN

SC

Senior Member

Joined: 07/01/2015

View Profile


Offline
Posted: 08/05/21 05:19pm Link  |  Quote  |  Print  |  Notify Moderator

Inflation pressures, they always seem to be a problem and no one likes the recommendations from the vehicle manufacturer.

The vehicle manufacturer has the sole responsibility for setting Original Equipment recommended cold inflation pressures. Those pressures are MINIMUM. If the vehicle manufacturer sees a need to provide optional recommended inflation pressures they will insure those options are printed in the vehicle owner’s manual and on the tire and load information placard.

This is verbatim from USTMA standards: Inflation pressure recommendations may also be determined based on the tire manufacturer’s specifications, which define the amount of inflation pressure necessary to carry a given load. These inflation pressures may differ from those found on the vehicle tire placard or certification label. However, never use inflation pressures lower than specified by the vehicle tire placard, certification label or owner’s manual. Nor should inflation pressure exceed the maximum pressure molded on the tire sidewall.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Fifth-Wheels

 > Tires and their pressures
Search:   Advanced Search

Search only in Fifth-Wheels


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.