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Tires and their pressures

prstlk
Explorer
Explorer
Ok folks - let me know what you think on this. We have a F350 1 ton diesel SRA and tow a 36 foot 5th wheel.

We have had 2 of our Yokahama Light Truck 10 ply tires go bad within 10 days. The first got a bubble at the bead and started loosing air. Thankfully we caught it before it went fully flat.

The second one literally exploded on us yesterday. We had just pulled off the freeway and were on a 6 lane street when it went. It also took out something in our week old breaks and we lost all of our rear break fluid.

So here's my question to you all. We called Yokahama this morning and were told that you should not run the recommended tire pressure that is on the door of the truck. They told us that you were supposed to adjust the pressure based on how heavy of a rig you are towing and that the tire dealer can help us figure out what that should be.

In all of the years we have been towing 5th wheels (3 different ones and 3 different sizes) I have never heard of this.

What say you folks?
2007 Keystone Challenger 5th wheel, Ford F350 Super Duty 6.7L Diesel, Short Bed, 2 dogs and the cat and rolling down the road full time since May 2014
20 REPLIES 20

time2roll
Explorer II
Explorer II
The door sticker should cover the GAWR. Are you certain you are not over the rating? What pressure does the door say? What does the scale say?

But quite frankly I think the tires are defective. I recommend top line Goodyear.

CALandLIN
Explorer
Explorer
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.

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.



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

Cummins12V98
Explorer III
Explorer III
"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.
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

TxGearhead
Explorer
Explorer
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

laknox
Nomad
Nomad
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
2022 GMC Sierra 3500 HD Denali Crew Cab 4x4 Duramax
B&W OEM Companion & Gooseneck Kit
2017 KZ Durango 1500 D277RLT
1936 John Deere Model A
International Flying Farmers 64 Year Member

jrichard
Explorer
Explorer
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

memtb
Explorer
Explorer
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

JIMNLIN
Explorer
Explorer
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

azdryheat
Explorer
Explorer
You need better tires. Try Michelins.
2013 Chevy 3500HD CC dually
2014 Voltage 3600 toy hauler
2019 RZR 1000XP TRE

phillyg
Explorer II
Explorer II
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

Cummins12V98
Explorer III
Explorer III
"They told us that you were supposed to adjust the pressure based on how heavy of a rig you are towing and that the tire dealer can help us figure out what that should be."

OMG, actually suggesting knowing your weights and airing accordingly. What is this world coming to???
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

ACZL
Explorer
Explorer
schlep1967 wrote:
You called the manufacturer of the tires and they told you the correct information. If you don't want to weigh your rig running your tires at the max inflation value on the tire will not hurt anything other than your kidneys from the rough ride.
The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.


I agree with this as well.
2017 F350 DRW XLT, CC, 4x4, 6.7
2018 Big Country 3560 SS
"The best part of RVing and Snowmobiling is spending time with family and friends"
"Catin' in the Winter"

Mickeyfan0805
Explorer
Explorer
schlep1967 wrote:

The door sticker only applies to the original tires that were on your truck. If you replace them with the exact same tires that door sticker will still apply. If you replace them with anything else go by the tire or the load/pressure table provided by that tire manufacturer.


This is the key. If you want to go by charts and precise weights, that's fine. If not, max pressure as listed on the TIRE is what you should run while towing. The stickers are meaningless once the OEM tires are off the truck.