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Old 05-16-2010, 08:04 PM   #1
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Help with Tire Pressure

We need help in trying to figure out what our tire pressure should be. We have Michelin 275/70R22.5 xza2 energy. We had our MH weighed today and we could only get 2 weights and they are steer axle 12760lbs, drive axle 18520lbs, gross weight 31280. Our GVWR is 33200 so we are definately below that. We went to the Michelin tire chart and we think our pressures should be 115 front and 85 back. Can anyone tell us if we are in the hunt. We are a little nervous on the tire thing.

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Cathy and Paula
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Old 05-16-2010, 11:34 PM   #2
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115 in the front sounds ok to me,but for the rear tires I would not go lower then 95lbs.
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Old 05-17-2010, 05:38 AM   #3
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tire pressure ??

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Originally Posted by siggyd View Post
115 in the front sounds ok to me,but for the rear tires I would not go lower then 95lbs.
Siggy D.
Have an 02 mountain aire diesel pusher. Just put new michelins on front.

Michelin has a web site that contains charts with proper inflation with different axle wieghts, charts also tell you that the each axle tire must have same pressure even tho the tire wieghts are different.

MICHELIN TIRE .COM

Hope this info helps

A. J.
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Old 05-17-2010, 12:12 PM   #4
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Hi Cathy and Paula,
Welcome to iRV2. I have the same size tires as you. My assumption is the tires are load range J. This is a very good tire. The PSI in your OP is correct. The front tires could go to 120 PSI, but no more. Check the wheels to make sure you are in compliance with the maximum PSI for the wheels (I think 120 PSI is max.). The rear tires can stay at 85 PSI. Because this is Michelin's minimum tire PSI and to minimize the irritation of not wanting to be under PSI, try 90 PSI. This is what I did for over 4 years and my tires are wearing perfectly even.

The only word of caution is to watch the rear weight. As you use the coach, it will gain weight (just like the rest of us). I am now at the 20K lb max GAWR. So my rear tire PSI is at 90 PSI.
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Old 05-17-2010, 12:25 PM   #5
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Welcome Cathy & Paula to the Newmar forum and irv2.
Gary's post is correct and some people do add 5lbs more to be safe at cold tire inflation, usually in morning before you leave on the road.
Enjoy the forums and do post often.
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Old 05-18-2010, 09:42 PM   #6
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First run through a truck stop that has scales that printout the weight on each axle, then go to the Michelin website mentioned above and you've got it.
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Old 05-19-2010, 07:15 AM   #7
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Thanks for the information we are going to go with 120/95 and monitor our tires. We are thinking about getting a pressure pro but sill investigating. They seem a little expensive but I guess in the long run it is worth it. We finally left yesterday for our first real voyage. We are heading into Colorado, Wyoming, South Dakato, Utah, Arizona, New Mexico and back to Texas for Christmas. So hope to see you on the road.

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Old 05-19-2010, 04:34 PM   #8
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I have the Pressure Pro on my Essex and love the security it provides, I also monitor the PT Cruiser in tow. On my first long trip the right front tire on the PT went flat disintegrated and did about $2000 damage to the car and delayed the return over a weekend in order to get just parts to make it roadworthy.
If you decide to go with Pressure Pro, let me know, I have an extra, still new, I ordered for a friend that never came with the $ and I'll deal.
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Old 05-19-2010, 09:50 PM   #9
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Quote:
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I have the Pressure Pro on my Essex and love the security it provides, I also monitor the PT Cruiser in tow. On my first long trip the right front tire on the PT went flat disintegrated and did about $2000 damage to the car and delayed the return over a weekend in order to get just parts to make it roadworthy.
If you decide to go with Pressure Pro, let me know, I have an extra, still new, I ordered for a friend that never came with the $ and I'll deal.
JVR
Hi JVR, which set up do you have available and how much? Thanks, Bbqdad
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Old 05-19-2010, 09:56 PM   #10
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How many sensors do you need, each sensor is $50
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Old 05-19-2010, 10:29 PM   #11
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How many sensors do you need, each sensor is $50
10 total. 2005 Dutch Star and toad
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