Advice on Tire Pressure

[travelin texans]

Originally Posted by CWtheMan

The most accurate definition for the tire's sidewall cold inflation pressure is; it's the tire manufacturers maximum permissible cold inflation pressure needed for the tire to produce it's maximum load capacity.

Yep! Knew that! Says so molded right into the tire right after the recommended pressure!
Replaced tires on my last 5th wheel from 16" G rated tires with approximately 55k miles on them to 17.5" H rated tires that had approximately 6k miles when sold & inflated both sizes to the sidewall maximum permissable cold inflation pressures, 110 psi & 125 psi respectively, no problems with either. Watched temps & pressures on the TPMS & never excessively high on either.

[tubacjohn]

Originally Posted by JSisemoreTX

I have a 2020 Keystone Avalanche 396BH. Dry weight around 14000 on 2 axles. About 16,000 going down highway with my F350 dually.

The tires are the original factory G rated tires...on a 2020 5th wheel...so I suspect the tires are 1-2 years old with less than 7,000 miles on them.

Dealership had tires to 80 psi and the max rating on these tires is 110....many people use the 100+psi for their heavy 5th wheels.

Anyone have a 16k lbs 5th wheel on 2 axles with these factory G rated tires? What is your ideal tire pressure (cold rating)?

110 cold for mine

[WDPatterson]

I see people recommending that you use the door sticker recommendation for the pressure of your tire. That's a fallacy. That's probably why they only put 80 psi in your tires.
*ALWAYS* use the specifications which are stamped on the tire, itself. The tire manufacturer specification is the pressure you should use. Buy tires that are meant to handle in excess of the weight of your rig.
If you buy tires that will handle more than the weight of your rig, and you inflate your tires according to the recommendation on the tire itself, you cannot fail. Be careful of companies like Discount Tire, or anyone else, who goes by your door sticker.

[CWtheMan]

Crappie? Crappie? Did someone say Crappie?

[CWtheMan]

Originally Posted by WDPatterson

I see people recommending that you use the door sticker recommendation for the pressure of your tire. That's a fallacy. That's probably why they only put 80 psi in your tires.
*ALWAYS* use the specifications which are stamped on the tire, itself. The tire manufacturer specification is the pressure you should use. By the tires that are meant to handle in excess of the weight of your rig.
If you buy tires that will handle more than the weight of your rig, and you inflate your tires according to the recommendation on the tire itself, you cannot fail. Be careful of companies like Discount Tire, or anyone else, who goes by your door sticker.

Actually tire manufacturers have nothing to do with setting vehicle recommended cold inflation pressures. The vehicle manufacturer has that sole responsibility.

The tire pressure molded into a tire's sidewall IS NOT a recommendation, it's a factual statement about the inflation pressure needed to attain the maximum load capacity from the tire it's molded into.

To comply with tire industry standards, Discount Tire has no choice other than sticker recommendations for OE tire sizes.

[Roostor]

Really good info...I have been using the tire pressure molded into the sidewall and if what I have read...that is the overall consensus to be the correct one to use. Thanks to all.

[Camp CA]

I run 110 psi on my trailer's g rated Sailun tires.

[Mikelff]

Originally Posted by WDPatterson

I see people recommending that you use the door sticker recommendation for the pressure of your tire. That's a fallacy. That's probably why they only put 80 psi in your tires.
*ALWAYS* use the specifications which are stamped on the tire, itself. The tire manufacturer specification is the pressure you should use. Buy tires that are meant to handle in excess of the weight of your rig.
If you buy tires that will handle more than the weight of your rig, and you inflate your tires according to the recommendation on the tire itself, you cannot fail. Be careful of companies like Discount Tire, or anyone else, who goes by your door sticker.

Absolutely agree with you. My 2018 5er had under rated tires specs from Keystone. They have since changed their tire ratings and load range. Mine came with E rated tires and 80 psi, and had a blow out. Minimal damage thank God. I now have G rated tires (Sailun) and 110 psi. Wheels are rated for 110 psi. I fill mine to 109 psi and keep them there. No issues since.

[jadatis]

Originally Posted by JSisemoreTX

I have a 2020 Keystone Avalanche 396BH. Dry weight around 14000 on 2 axles. About 16,000 going down highway with my F350 dually.

The tires are the original factory G rated tires...on a 2020 5th wheel...so I suspect the tires are 1-2 years old with less than 7,000 miles on them.

Dealership had tires to 80 psi and the max rating on these tires is 110....many people use the 100+psi for their heavy 5th wheels.

Anyone have a 16k lbs 5th wheel on 2 axles with these factory G rated tires? What is your ideal tire pressure (cold rating)?

Mayby dumb that I dont know what sises tires the
Keystone Avalanche 396BH has, but if you give it, I will calculate a safe pressure for you. Then I will show how I do it , so you can yudge yourselfes the value of my advice.

[eddiefenton76]

Please Advise.
So.... Is this the Bottomline:
Use the Maximum PSI stamped onto the sidewall for maximum weight capacity.

True or False?

[CWtheMan]

Originally Posted by eddiefenton76

Please Advise.
So.... Is this the Bottomline:
Use the Maximum PSI stamped onto the sidewall for maximum weight capacity.

True or False?

The way you have worded it makes your statement true.

[gearhead]

Let's review what I'm doing and someone (CW ?) tell me if I'm good.
The 5th has 215/75 17.5 LR H. Max PSI is 123#, which is where I run them.
My truck door sticker has 80PSI front and 65PSI rear, which is where I run them.

Good?

[CWtheMan]

Originally Posted by gearhead

Let's review what I'm doing and someone (CW ?) tell me if I'm good.
The 5th has 215/75 17.5 LR H. Max PSI is 123#, which is where I run them.
My truck door sticker has 80PSI front and 65PSI rear, which is where I run them.

Good?

I don't see anything wrong with that if all tires are Original Equipment.

[jadatis]

Originally Posted by gearhead

Let's review what I'm doing and someone (CW ?) tell me if I'm good.
The 5th has 215/75 17.5 LR H. Max PSI is 123#, which is where I run them.
My truck door sticker has 80PSI front and 65PSI rear, which is where I run them.

Good?

Probably my advice will come a bit higher then sticker, but not the 123 psi max given on tires
For that I need GAWR's or best real axleweights.
Tires specifications I can google, but if you give maxload it would be nice.

Suspect dualloaddrive-axle because of lower advice behind.

[gearhead]

Originally Posted by CWtheMan

I don't see anything wrong with that if all tires are Original Equipment.

No they are not original equipment. But they are the same size and load rating. Trailer tires are the same basic construction..steel cased. New Hercules vs. OEM Sailun.
Truck tires are the usual steel belted radial. New Cooper vs. OEM Nexen.

[CWtheMan]

Originally Posted by gearhead

No they are not original equipment. But they are the same size and load rating. Trailer tires are the same basic construction..steel cased. New Hercules vs. OEM Sailun.
Truck tires are the usual steel belted radial. New Cooper vs. OEM Nexen.

My previous answer was incomplete. I should have mentioned that if the replacement tires are the same designated size as the OE tires, there is no problem in your method of tire inflation.

[gearhead]

10-4.
Casting lines away and taking a 90 degree heading before 0900 tomorrow. Plan of the day is is take the somewhat backroad of US190 to Lakeside RV Park in Livingston LA.
Tell the girls good bye for me.

[jasin1]

Originally Posted by gearhead

10-4.
Casting lines away and taking a 90 degree heading before 0900 tomorrow. Plan of the day is is take the somewhat backroad of US190 to Lakeside RV Park in Livingston LA.
Tell the girls good bye for me.

sounds like a nice trip!

[sourdough]

Originally Posted by gearhead

10-4.
Casting lines away and taking a 90 degree heading before 0900 tomorrow. Plan of the day is is take the somewhat backroad of US190 to Lakeside RV Park in Livingston LA.
Tell the girls good bye for me.

Have fun Brent....and watch out for another deep freeze.....we don't have ERCOT or the PUC! Oh no, heaven forbid....or, thank the Lord (yes)!

[JSisemoreTX]

Originally Posted by gearhead

I really thought I wanted the advantages of the H rated tires when I was shopping for another 5th. Now that I have them, I think I would prefer triple axles with 16's. Those 17.5 tires and wheels are heavy, very heavy.

Hey Sisemore..are the crappie biting in Luce's Bayou?
Not that I have time to chase them, leaving in 10 days for hillbilly country...Tennessee, N Carolina, and Virginia.

Luce Bayou is literally 300 yards from my house, lol. The Crappie are in fact biting!