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Old 09-13-2015, 08:06 AM   #1
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Tire Inflation?

I have a 2000 37 foot Itasca with Kelly Springfield tires " 245/70R19.5"

What should my Air Inflation be front and back?
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Old 09-13-2015, 08:16 AM   #2
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Old 09-13-2015, 08:23 AM   #3
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The tires don't seem to suggest what air pressure should be. I need a starting point?
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Old 09-13-2015, 08:28 AM   #4
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There should be a placard on the wall next to the drivers seat . It will have recommended tire pressure for maximum axle load for the original tire size.
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Old 09-13-2015, 08:33 AM   #5
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It looks like this.
Click image for larger version

Name:	ImageUploadedByiRV2 - RV Forum1442154819.334298.jpg
Views:	201
Size:	218.4 KB
ID:	106743
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Old 09-13-2015, 08:47 AM   #6
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The tires will also have a maximum pressure at rated carrying capacity shown on the sidewall. I am not suggesting that you necessarily need maximum pressure, but you will not want to exceed it. As previously suggested, you need to find the sticker in the coach that shows the "suggested" tire pressures. That's a good starting point. For a precise determination of what tire presures will be best for your coach, you need to have it weighed on all four corners when fully loaded. In my experience, not many coach owners actually do that however. At least, go with the sticker pressure suggestions.
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Old 09-13-2015, 08:52 AM   #7
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Quote:
Originally Posted by Clifftall View Post
It looks like this.
Attachment 106743

Ok Plate said 70 PSI and all tires seem to be a little over that but at same level. So I am feeling like its good. Thanks for the help....
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Old 09-14-2015, 02:33 AM   #8
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Quote:
Originally Posted by homeless View Post
I have a 2000 37 foot Itasca with Kelly Springfield tires " 245/70R19.5"

What should my Air Inflation be front and back?
I inflate my tires to [email protected] 70 deg f.
michelins, same size as yours.
that is the pressure that Michelin recommends for the weight they are carrying.
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Old 09-16-2015, 04:06 PM   #9
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I was told over at a tire store that my tires are G rated and should be inflated to 110 psi?
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Old 09-17-2015, 01:19 AM   #10
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homeless,
you need to find a weight/pressure chart and at a minimum get axle weights and go from there.
what is the maximum pressure molded into the sidewall of the tire?
you can run that pressure until you get your Moho weighed.
if you have too much pressure for your weight, the ride will be rougher than normal.
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Old 09-17-2015, 06:30 AM   #11
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homeless,
you need to find a weight/pressure chart and at a minimum get axle weights and go from there.
what is the maximum pressure molded into the sidewall of the tire?
you can run that pressure until you get your Moho weighed.
if you have too much pressure for your weight, the ride will be rougher than normal.

I would love to find a chart. My specs seem to suggest my motorhome weights in at 20,000. And with more air it does seem to be rougher ride?
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Old 09-17-2015, 06:58 AM   #12
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Here's a link that has contact info. Hopefully they can point you to a chart.

http://www.kellytires.com/en-US/company/help-center
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Old 09-17-2015, 07:20 AM   #13
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Quote:
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I was told over at a tire store that my tires are G rated and should be inflated to 110 psi?
That is the maximum pressure that is likely in the sidewall somewhere in very small letters. Unless you are maxed out on weight at all four corners, running your tires at max pressure can cause harsh ride, flighty steering, and premature tire wear.
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Old 09-19-2015, 07:49 PM   #14
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Max pressure is on all tires. Take your rig to A Cat scale loaded for travel and get it weighed. Then go to Michelins site and you can figure out what the proper inflation is for your weight. Then add 5 psi for side to side weight difference. Sticker on my RV placard says 100 psi, max PSI for my tires is 110. Michelin chart says I should inflate my fronts to 70 psi and the rear to 80 psi. Since I can't do 4 corner weighing I inflate the fronts to 80 pis and the rears to 90 psi.
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Old 09-20-2015, 01:51 PM   #15
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Looks like the tires are made by Goodyear, therefore I'd probably use the Goodyear tire pressure inflation guide.
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