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Old 12-29-2018, 07:18 AM   #1
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F-53 standard rim air pressure

I have an '07 chassis with 19.5 rims. What is the max pressure these rims are capable of handling safely? Thanks
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Old 12-29-2018, 08:00 AM   #2
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I suspect the rim can handle whatever is on the tire sidewall. Don’t put more in it that that. Why the question?
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Old 12-29-2018, 08:11 AM   #3
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Puttin, I don’t have a answer to your question but I did want to compliment you on your excellent choice in rigs!
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Old 12-29-2018, 08:29 AM   #4
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Blastvalve, thanks..your Itasca must be beautiful as well.

I ask the question because even though the placard in the rig says 93lbs- that was for the G-670's I just replaced with a higher load range set that has cold infl.pressure of 120 psi. I know I don't need to run that high but I was just curious about what the spec was for my rims.
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Old 12-29-2018, 08:34 AM   #5
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Should be stamped on the rim someplace. Might have to remove a wheel to find it.
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Old 12-29-2018, 12:38 PM   #6
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Should be stamped on the rim someplace. Might have to remove a wheel to find it.
SameF53 I run 85 lbs more comfortable ride on higher load rated tires.
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Old 12-29-2018, 02:15 PM   #7
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Should be stamped on the rim someplace. Might have to remove a wheel to find it.
It should be stamped in the horizontal portion offset side of the rims. That is the exposed side on the outer duals. Just remove the wheel cover to find it. Keep in mind the wheels are painted after they are stamped, so it might be a bit difficult to find.
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Old 12-29-2018, 02:49 PM   #8
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My rims are stamped with all types of information but I don't see anything concerning PSI.
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Old 12-29-2018, 04:36 PM   #9
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Don't concern yourself with the rims. They can withstand a lot more pressure than the tires. If the tire is rated to 120 psi cold don't inflate over that limit. Your rims will handle a lot more than that. The tire will heat as it rolls down the road and a pressure near 140 psi is possible when the tire is at operating temp. I keep my pressure at 90 psi cold and get as much as 22 psi rise at peak temp. The tires will cool some after the warmup and usually stabilizes around 18 psi over cold inflation pressure. It also depends on the road temp and grade. The left front tire runs 1 or 2 psi cooler than the right if the road grade or crown causes the coach to lean a little. The rear tires follow this pattern especially the outside tire.

The 120 psi is the maximum cold inflation pressure. With my Toyo's I put 110 psi in the tires initially. I replaced the Badyears I had with Toyo's. The ride was too firm so I lowered the pressure to the sticker recommendation of 85 psi. The handling was sluggish and the coach had a tendency to wander. So I went back up on the pressure to 100 psi and got rid of the handling issues but the ride was still too rough. I dropped the pressure in 5 psi increments to 90, found the sweet spot there, and have run at that pressure ever since. There are charts available on line from tire manufacturers that give the load versus pressure. If you don't need 120 psi to carry the load lower the pressure to what the tire manufacturer recommends. I'm well within the load range for the pressure I run.
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Old 12-29-2018, 04:44 PM   #10
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Blastvalve, thanks..your Itasca must be beautiful as well.

I ask the question because even though the placard in the rig says 93lbs- that was for the G-670's I just replaced with a higher load range set that has cold infl.pressure of 120 psi. I know I don't need to run that high but I was just curious about what the spec was for my rims.
That pressure stamped on the side of the tire is the MAXIMUM cold infl. pressure that Goodyear allows the tire to inflated to. The RECOMMENDED is MUCH LESS based on the weight being placed on the tire.

Your RV manufacturer has looked at a Goodyear table and has posted the cold pressure that Goodyear recommends for your particular RV at its maximum weight as shown on the VIN label. USE THAT, NOT 120 PSI ! ! ! !

You can use Google Search to find the same Goodyear document that has the table that shows recommended cold tire pressure vs. weight load on the tire if you want to confirm for yourself.

Good luck.
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Old 12-29-2018, 05:48 PM   #11
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SameF53 I run 85 lbs more comfortable ride on higher load rated tires.
X2

You don't want to run max psi the motorhome will pound like heck going down the road, 80 to 90 psi is the norm on the 19.5 tires for comfort ride, however do have your motorhome weighed and see what is the best psi.

And to answer the OPer question the 19.5 rims will handle up to 140 psi.
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Old 12-29-2018, 08:32 PM   #12
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My steel 19.5 rims say "110 PSI MAX" stamped right in the metal.

Weigh your rig and run the presure according to the chart.
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Old 12-29-2018, 08:54 PM   #13
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That pressure stamped on the side of the tire is the MAXIMUM cold infl. pressure that Goodyear allows the tire to inflated to. The RECOMMENDED is MUCH LESS based on the weight being placed on the tire.

Your RV manufacturer has looked at a Goodyear table and has posted the cold pressure that Goodyear recommends for your particular RV at its maximum weight as shown on the VIN label. USE THAT, NOT 120 PSI ! ! ! !

You can use Google Search to find the same Goodyear document that has the table that shows recommended cold tire pressure vs. weight load on the tire if you want to confirm for yourself.

Good luck.
Actually the pressure shown on the sidewall of a heavy duty tire is NOT the maximum cold pressure. But is the MINIMUM cold pressure to support the maximum weight the tire should carry. This takes into account the pressure rise due to temp increase when underway.
I have lots of printed documentation to back up what I posted, just not on my cell phone.
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Old 12-29-2018, 09:14 PM   #14
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A Goodyear 245/70 R19.5 RV Tire has a load capacity of 3640 lbs. when used as a single / 3415 when used as half of a dual, when used at it's minimum recommended cold inflation pressure of 80 PSI.

This rises to load capacity of 4540 lbs. when used as a single / 4410 when used as half of a dual, when used at it's maximum recommended cold inflation pressure of 110 PSI.

Guess you are going to do what you want, but the right way is to go by your axle weights as loaded when you travel and inflate accordingly. Overinflation is going to cause abnormal tire wear and degrade handling as you will have a smaller contact patch touching the pavement.

https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
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