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Old 06-21-2007, 12:29 PM   #1
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We've been monitoring the tire sidewall temps. using an IR device when we stop in rest areas. On 80-90F summer days after interstate driving at 70 mph we get between 126 - 135F --- are these numbers in an acceptable range based on others experience?
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Old 06-21-2007, 12:29 PM   #2
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We've been monitoring the tire sidewall temps. using an IR device when we stop in rest areas. On 80-90F summer days after interstate driving at 70 mph we get between 126 - 135F --- are these numbers in an acceptable range based on others experience?
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Old 06-21-2007, 03:01 PM   #3
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If you are running the correct psi for your load I would think you should be concerned with temps that vary widely. That's what would show a problem quickest, dragging brake, low pressure etc. jmo
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Old 06-21-2007, 05:03 PM   #4
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I have been using a more primitive device, my hand. Warm, but not hot, that's between 120 and 150 F I would say. Never had any problems.

OTOH, I have blown trailer tires in another life. I felt the other tire just out of curiosity. I could not hold my hand on it, and that would be in excess of about 160F

Neat idea. Technology is wonderful, back in the early 80's I rented an IR gun to check some temps on an engineering project. They were about $10,000 back then. I saw one for a $100 the other day.
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Old 06-21-2007, 05:44 PM   #5
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Old 06-21-2007, 05:46 PM   #6
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Bontemp,

Welcome to IRV2.com. You will find lots of helpful folks here.

To me the most important thing to worry about is the air pressure in your tires as a function of your fully loaded coach weights.

Have your coach weighed, and check the cold pressures as a function of the axle (or individual corner) weights as specified by your tire vendor's web site.

I wouldn't worry about the side wall temps if you religiously check your air pressure.

Happy motoring!
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Old 06-21-2007, 06:16 PM   #7
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on a trip thru bakersfield 100 degrees outside. tire temps varied from 135 to 150 degrees on the same mh and same time of day. tires in the sun were higher. inside dual was higher than outside tire. use lazer temp gun.
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Old 06-24-2007, 05:25 AM   #8
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I have used a laser thermometer on the tires and the temperatures you are getting are in the same area as I have recorded. All tires should be in the same temperature range. If you have a wide spread, check tire pressures closely.

I do not drive 70 MPH, but stay in the 60 to 65 range

I was trying various tire pressures to adjust the ride so I was checking temperatures to make sure I was not underinflated. Get the vehicle weighed and you can a better idea of tire pressures.

Do not forget to check the toad
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Old 06-24-2007, 05:33 AM   #9
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Bontemp, welcome to iRV2.

I see the same results as others, and as Tommy posted; sunny side and inside duals have higher temps.

The IR thermometer is a quick way to spot trouble.
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Old 06-24-2007, 07:55 AM   #10
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Just wanted to point out that the "laser" is really an infrared temp sensor. The laser dot is simply to aim the device.

I check outs with a small infrared gun as well. You may see a few degrees difference from side o side of one side has been running in full sun.

Ken
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Old 06-25-2007, 10:19 AM   #11
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I use the IR from Radio Shack that goes on sale for $29 at times. I find the inside tires are usually a few degrees cooler on the sunny side. My hottest tires are usually the front of the toad. I just got new Michelins this morning. No one else makes the 235 80R22.5 so my choice was rather narrow.
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Old 06-26-2007, 06:37 AM   #12
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Thanks for all the good info - the RV tire situation is such a major issue for many of us that I feel we need more data i.e. tire temps etc. shared between us. We acknowledge that the corner weights and inflation pressures are paramount however. When the budget permits, the auto-inflation and tire rim temp monitoring system looks like a desirable option. When we had the front 275/70R22.5's replaced with 10,000 mi. the dealer asked what to do with the "take offs"? He suggested carrying one as a spare but our slideout storage bins cannot accomodate such a large tire due to other gear. Do many claas A motorhome folks carry spare tires? (except around the waistline)
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Old 06-26-2007, 07:28 AM   #13
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I carry an unmounted spare in the basement. It is more important than some of the other stuff I would accumulate in it's place.
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Old 06-29-2007, 07:38 AM   #14
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Sorry I'm late to this one. I run 20 degrees above ambient,rear and 30 degrees above ambient,front plus 15 degrees in sunlight. Have three spares. One on the rear bumper. Two on the rear axle. The United States Navy hand temperature test is if you can keep your hand to it for more than 10 seconds it is less than 120 degrees farenheit.
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