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Old 06-14-2015, 03:12 PM   #1
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Tire Pressure

What is the correct tire pressure on Michelin 235/80 x22.5 tires. This is for a Georgetown 360. Leaving Thursday, any help would be appreciated. TT
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Old 06-14-2015, 03:31 PM   #2
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What is says on the sidewall is often suggested, underinflated tires build heat quicker.


Be sure to check the pressure when the tires are cold.
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Old 06-14-2015, 03:45 PM   #3
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What is the correct tire pressure on Michelin 235/80 x22.5 tires. This is for a Georgetown 360. Leaving Thursday, any help would be appreciated. TT
Isn't there a sticker inside the coach somewhere stuck on the wall, perhaps close to vin data sticker, similar to auto door stickers for tires that has that data? Pressures on tire sidewalls are typically maximum inflation pressures.
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Old 06-14-2015, 03:45 PM   #4
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been running at 90 lbs says 110 maybe to low
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Old 06-14-2015, 03:50 PM   #5
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Fill the tires cold to the maximum pressure on the sidewall.

This is always safe for your vehicle; though if you weigh less that the sum of the load rating on your tires, the ride can be quite harsh.

However, if you wish to "optimize" your ride and still be safe, you need to weigh each axle and inflate the tires on each axle to the cold pressure needed to support THAT weight.

There are charts offered by the tire manufacturers that will let you know what that cold pressure should be. Like these from Maxxis and Michelin:
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Old 06-14-2015, 04:57 PM   #6
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I have used 90 as per the chart in my 360 for 4 seasons now and ride and handling are excellent. Also no uneven tire wear. Did not need an alignment when brand new either. Lucky I guess. Last fall I topped off at 90 up in Maine when temps were in the 50's. This June in Florida the tires were at 95pisi at 90 degrees. Left them at that when we left for Maine and felt no difference.
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Old 06-14-2015, 06:44 PM   #7
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I have used 90 as per the chart in my 360 for 4 seasons now and ride and handling are excellent. Also no uneven tire wear. Did not need an alignment when brand new either. Lucky I guess. Last fall I topped off at 90 up in Maine when temps were in the 50's. This June in Florida the tires were at 95pisi at 90 degrees. Left them at that when we left for Maine and felt no difference.
My motorhome, a 378 (22.5 tires) posted chart inside the coach also says 90 psi front and rear. That's what I run em at. My last MH also said the same thing. I changed them at 7 years, 68000 miles and they still looked new. I probably check the pressure once a year but have never had to add air (it varies a few pounds). It all equals out when weather is normal. Trailers, of course, are another ballgame.
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Old 06-15-2015, 12:15 PM   #8
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Since we are full timers we have a lot in out MH and I run the rear at 100# and the fronts at 95# and the ride is great for us. As stated above need to weigh the MH and then make your adjustments.
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