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Old 10-06-2013, 08:56 PM   #1
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Tire temperature

Have a 2004 national seabreeze on a wirkjorse chassis 22.5 inch Michelin tires

One set of dual right rear running 20to 25 degrees hotter About 130 on outside tire and 145 on the inside

Inflated at 90 pounds and I am hauling car on a trailer do I weigh the max 26000 pounds

Been running like this for years now nut never noticed this but I now have an infa red gun

Is this excessive for this tire?

Sam
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Old 10-06-2013, 09:41 PM   #2
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I would guess that you need more air pressure in your rear tires, you have added weight with the tounge weight of the trailer. I would recommend the max pressure shown on the tire sidewall. The difference in temperatures tells that the inside tire is carring slightly more weight than the outside tire, probably slightly larger in diameter. 15* difference isn't anything to worry about, but 145* is getting to the point that I try not to go any hotter. More air pressure will help lower this, as long as the tires and wheels are rated for more air. My 22.5" tires, I always ran 100 to 105psi, with the ability of going to 110psi if needed.
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Old 10-06-2013, 10:11 PM   #3
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Old 10-06-2013, 10:35 PM   #4
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The inside dually does not cool as well as thr outside, so will be warmer.
Tires on the sunny side will be warmer too.
145 is not out of scope.
Checking side to side loading may be a good thing.
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Old 10-06-2013, 10:39 PM   #5
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Frustrating thing is in two hours I can not find temperature specs for xrv tire everyone talks about checking temps but no one seems to say what is allowed
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Old 10-06-2013, 10:41 PM   #6
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Frustrating thing is in two hours I can not find temperature specs for xrv tire everyone talks about checking temps but no one seems to say what is allowed
I do not know. But 170 would make me look deeper into the issue.
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Old 10-07-2013, 12:20 AM   #7
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Some info here:RV Tire Safety: Quick post on Max tire temperatures
From the article-
"My information indicates that a properly loaded and inflated Class-A tire will probably see 140F to 170F operating temperature and these temperatures are OK as the tire is designed for this temperature range."

BUT- He also discusses where the temperature is measured is a factor. Sidewall or tread etc. TPMS would measure at the end of a valve stem or extension and not accurately reflect tire temp.

I also use the IR temp, read the sidewall at the edge of the tread. (seems highest) and look for a significant difference in tire temps. My temps run lower than you indicate but my GVWR is 22K and fully loaded I'm just over 20,500. I see 105-115deg. normally, highest was 125-130, (100+deg day on blacktop)

You may have more weight on the RR duals.
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Old 10-08-2013, 06:57 AM   #8
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Frustrating thing is in two hours I can not find temperature specs for xrv tire everyone talks about checking temps but no one seems to say what is allowed
Bridgestone Commercial Truck Tires

60 degrees F above ambient. 200 degrees F is where you should get concerned.
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Old 10-08-2013, 07:16 AM   #9
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Thanks for the specs

Yesterday I uped the air in the duals from 90 to 105

Drove from atlanta to ocala hot day between showers

Hugest temp was 135 on right duals

Following light shower they were down to close to 100

Think I am Ok

Next stop sarasota
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Old 10-08-2013, 10:06 AM   #10
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Originally Posted by Samflhomes View Post
Thanks for the specs

Yesterday I uped the air in the duals from 90 to 105

Drove from atlanta to ocala hot day between showers

Hugest temp was 135 on right duals

Following light shower they were down to close to 100

Think I am Ok

Next stop sarasota
Don't depend on temperature to tell you if your tires are properly inflated. Get your coach and trailer weighed. The best way is to have all 4 corners weighed separately, but it's not always easy to find a place that can do that.

At the very least, have your coach and trailer weighed by axle. Most truck stops have segmented scales where you can get the weight of each axle. It had been some time since I was on a truck scale, but the last time it cost under $10.

Use the load/pressure table provided by your tire manufacturer to set your tire pressures. If you don't have individual corner weights, divide the axle weight by 2 and add 10 to 15% for possible imbalance.
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