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Old 03-09-2016, 04:05 PM   #11
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Originally Posted by Gualter View Post
My sticker lists 100 psi and the tires say 110 psi max.

Just had first oil change at Ford ,they said to run 100 psi.
I have a 2016 378ts

My sticker says 100 psi as well



2014 Georgetown XL 378
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Old 03-09-2016, 04:25 PM   #12
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My sticker says 100 psi as well
2014 Georgetown XL 378
I bet you have tile floors. That is the extra weight.
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Old 03-09-2016, 04:28 PM   #13
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Originally Posted by Gualter View Post
My sticker lists 100 psi and the tires say 110 psi max.
Just had first oil change at Ford ,they said to run 100 psi.
I have a 2016 378ts
But what does the sticker in your Georgetown say?
That is calculated by the weight of your specific rig.
Who is "they said"? The guy who changes your oil?
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Old 03-09-2016, 05:12 PM   #14
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I bet you have tile floors. That is the extra weight.

Yes I do


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Old 03-09-2016, 05:43 PM   #15
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I have the same 378TS and I run them at 90 psi all around as per the sticker on the interior wall says behind the drivers seat.
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Old 03-09-2016, 08:53 PM   #16
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Old 03-10-2016, 04:08 PM   #17
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Forget the American made pressure loadcapacity lists for LT and TR tires.
They are made with a formula that leads to lower loadcapacity's in the lower pressures then for instance the European calculation, wich is used of all kinds of radial tires for decades.
For Normal car tires ( P-tires) American TRA stepped over to the European ETRTO calculation as late as 2006, so that calculation is right now, but still many old lists are wondering around on the internet.
For LT and TR tires even a better formula should be used then the EUR calc.

I made my own pressure loadcapacity-lists wich are extra save . you can find it in PDF in this map on my one-drive.
https://onedrive.live.com/?id=A526E0...26E0EEE092E6DC

But I can also calculate it for you wiht my motorhome tirepressure calculator.
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Old 03-10-2016, 09:42 PM   #18
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Forget the American made pressure loadcapacity lists for LT and TR tires.
They are made with a formula that leads to lower loadcapacity's in the lower pressures then for instance the European calculation, wich is used of all kinds of radial tires for decades.
For Normal car tires ( P-tires) American TRA stepped over to the European ETRTO calculation as late as 2006, so that calculation is right now, but still many old lists are wondering around on the internet.
For LT and TR tires even a better formula should be used then the EUR calc.

I made my own pressure loadcapacity-lists wich are extra save . you can find it in PDF in this map on my one-drive.
https://onedrive.live.com/?id=A526E0...26E0EEE092E6DC
But I can also calculate it for you wiht my motorhome tirepressure calculator.
jadatis
Not sure what you are talking about but we are talking about Motorhome tires for 22,000 -24,000 lb chassis.
The tires we are talking about are 14 ply Load Range G which are close to Semi-Truck tires and are not trailer or car tires.
Each Motorhome in US has a sticker showing Max Gross weight of motorhome and have a specific max tire pressure for that load. Most of our rigs are not 100% fully loaded so the weight is less and we are just talking about true weight in relations to the specific tire manufacturers sheet for psi vs loads.
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Old 03-11-2016, 03:50 PM   #19
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answer to above.

what I mean is that you dont have to search for a pressure/loadcapacity list, yust open the link I gave and select the loadrange ( given to J with125 psi, so also the one you need) . Maximum load is only given in the Loadindex steps, so in America you sometimes have to round down, wich only gives higher pressures, so never wrong.

wise is also when weighed, to add 10% first and look that load back in the list.

then You have a extra save list and even higher pressure given then AT-pressure. But also goes pretty low in the pressure , lower then most official lists give.

Pick the USA map and even a total pdf is given with all the loadranges.

The SL and XL P tires I only mentioned to prove that also TRA concluded their old calculation was wrong, thoug they did not bring it that way.
The Eur calc for LT and TR was already better for decades, and still in USA the inadequate calculation is used.

Thats the reason why I advice to use my lists, give sertainly no lower pressure so always save.
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Old 03-11-2016, 05:50 PM   #20
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You can Google the 2016 Ford F53/F59 specifications and find the recommended inflation for the MAX GVWR with factory tires. For 19.5 tires they show 15k-20.5k at 82 psi, for 22k 95 psi, and for 22.5 tires, 22k at 90 psi, 24k at 100 psi. Obviously weighing the coach and using the corresponding pressure is a better solution.
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