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Old 10-19-2018, 04:03 PM   #1
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Whats the required tire pressure for my RV

The tires are 275 / 80 R 22.5.

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Old 10-19-2018, 04:22 PM   #2
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The tires are 275 / 80 R 22.5.

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Find the weight of your coach first...by corner if possible. Then look at the table for your tire pressure from the tire company, found on line if necessary. This is not a quessing time, weigh first.
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Old 10-19-2018, 04:37 PM   #3
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...or locate the FMVSS tire placard that is located somewhere on/in your coach which lists the recommended tire pressures for the OEM tires. That's a reasonable place to start, if you want to get exact then by all means have it weighed and look at the inflation charts for the tires, but realize those inflation charts are showing the minimum pressure for a given tire load. Those are not recommended pressures as recommended pressures come from the vehicle manufacturer, not the tire manufacturer.
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Old 10-19-2018, 05:56 PM   #4
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but realize those inflation charts are showing the minimum pressure for a given tire load.
ABOVE is the correct answer. Those inflation charts are handy, but those are the MAXIMUM loads for a given pressure. They are NOT the perfect pressure for that load.
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Old 10-19-2018, 08:05 PM   #5
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ABOVE is the correct answer. Those inflation charts are handy, but those are the MAXIMUM loads for a given pressure. They are NOT the perfect pressure for that load.
On our coach, the placard shows 120psi...after weighing and following manufacturer's table. I use 98lb up front, 105lb, rear and we comply having a nice ride as well.
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Old 10-19-2018, 08:54 PM   #6
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On our coach, the placard shows 120psi...after weighing and following manufacturer's table. I use 98lb up front, 105lb, rear and we comply having a nice ride as well.
Which is fine... That's what the table is for. But just keep in mind that you are now and the absolute maximum weight for that given pressure. If you decide to load a few bikes on, load a ton of food on board, your tires are now under-inflated.

People usually think "The chart says I need 100 psi for X,XXX lbs." When in reality, the chart is stating "100psi is the MINIMUM amount of psi needed for X,XXX lbs.

Just be mindful. That's all I'm asking.
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Old 10-19-2018, 08:58 PM   #7
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Which is fine... That's what the table is for. But just keep in mind that you are now and the absolute maximum weight for that given pressure. If you decide to load a few bikes on, load a ton of food on board, your tires are now under-inflated.

People usually think "The chart says I need 100 psi for X,XXX lbs." When in reality, the chart is stating "100psi is the MINIMUM amount of psi needed for X,XXX lbs.

Just be mindful. That's all I'm asking.
True, my axle weight called for 92#, so I allowed for extra stuff...same on rear tires. I carry about 5#over minimum, but well under 120#.
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Old 10-19-2018, 10:52 PM   #8
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True, my axle weight called for 92#, so I allowed for extra stuff...same on rear tires. I carry about 5#over minimum, but well under 120#.
I used to work for a major school bussing contractor as an ASE diesel tech. We filled the bus tires to 120 pounds no matter what. DOT regs and company policy mandated those kinds of things so when I hear about people talking about the dreaded "chart" my hands get clammy. I've seen several blowouts because of under-inflation, or over-loading.
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Old 10-19-2018, 10:56 PM   #9
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...or locate the FMVSS tire placard that is located somewhere on/in your coach which lists the recommended tire pressures for the OEM tires. That's a reasonable place to start, if you want to get exact then by all means have it weighed and look at the inflation charts for the tires, but realize those inflation charts are showing the minimum pressure for a given tire load. Those are not recommended pressures as recommended pressures come from the vehicle manufacturer, not the tire manufacturer.
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Old 10-20-2018, 12:03 AM   #10
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Whats the required tire pressure for my RV

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Originally Posted by mckyver View Post
The tires are 275 / 80 R 22.5.

Thank youAttachment 189574


Go to michelinrvtires.com

Good reference material on motor home tires.
Tire pressures need to be set based on the loaded weight of the motor home.
You may even have a copy of the Michelin RV tire guide in all the manuals that came with the RV we did.
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