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Old 09-25-2016, 04:46 PM   #43
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Originally Posted by joseph lamb View Post
So , I have a question .
2000 minnie winnie 22 foot motor home , with 4 Americus Commercial Chinese
Tires mounted and balanced 36 montha ago , with 4000 miles on them .
8500 lb motor home with Dans 70 rear end .

Running 65 pounds of air pressure since installed and two of the tires today are running out of round big time . Rattled my teeth all the way home >

Just started this am on trip back to Tampa .

Looks like junk tires to me . What causes this problem to appear >??

Anyone got their two cents ????????I am going to New Mexico soon .

Joe in Tampa
Sorry just not enough data. Tires do not fail due to average loading. You really need to know the actual load on each tire or at least on each axle. If you can't get individual tire loads then assume your motorhome axle is unbalanced at 47/53%

65 psi may or may not be enough air. It depends on tire size, type and the load on that tire.
If your tires have gone "out of round" there is a good chance they are in the process of separating. Get them inspected AT once. This does not mean a walk around the Rv and look at dread depth but measure Radial run-out and lateral run-out.
Read my post on tire inspection.

How often have you checked air pressure? Have you ever been low by more than 5 psi? Have you confirmed your pressure gauge is accurate to +/- 2 psi or less?
Why aren't you running a TPMS?
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Old 09-25-2016, 05:45 PM   #44
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It's OK to have a pet hypothesis.
Pet?....lol, fact, but the experts here haven't replied or thought of that scenario so it has to be "Theory" Book smart vs common sense again!
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Old 09-25-2016, 06:53 PM   #45
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There is a current thread in the International Rally forum with pictures of the tire failure on the tow dolly. The original incident that caused the tire failure is unknowingly explained by the thread starter.
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Old 09-25-2016, 07:07 PM   #46
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Pet?....lol, fact, but the experts here haven't replied or thought of that scenario so it has to be "Theory" Book smart vs common sense again!
Please go look up the definitions of "hypothesis" and "theory" in the scientific context. They are both often used incorrectly.

http://www.diffen.com/difference/Hypothesis_vs_Theory
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Old 09-25-2016, 07:12 PM   #47
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Please go look up the definitions of "hypothesis" and "theory" in the scientific context. They are both often used incorrectly.

http://www.diffen.com/difference/Hypothesis_vs_Theory

I have a theory about a hypothesis but fear it may be off topic, so.....
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Old 12-11-2016, 04:09 PM   #48
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Tireman. We just purchased a preowned 2015 Lacrosse 318BHS I am sure tires are the originals, we both dont know much about all this, we are new to rvng. Husband says they are only one yr old they should still have a lot of time to be replaced. We are planning for now to only do close by trips here in Fla, and drive at a slow relaxed speed, we are in no hurry, my question is how do we know if they are still good or when they would need replacement before they go bad. It has to be super scary to have one of them go bad on a trip while yr driving. Tks for your experteese and advice.
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Old 12-11-2016, 05:03 PM   #49
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Driving too fast overheating the tire,low air pressure from what I've seen. No common sense!
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Old 12-12-2016, 01:59 PM   #50
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Tireman. We just purchased a preowned 2015 Lacrosse 318BHS I am sure tires are the originals, we both dont know much about all this, we are new to rvng. Husband says they are only one yr old they should still have a lot of time to be replaced. We are planning for now to only do close by trips here in Fla, and drive at a slow relaxed speed, we are in no hurry, my question is how do we know if they are still good or when they would need replacement before they go bad. It has to be super scary to have one of them go bad on a trip while yr driving. Tks for your experteese and advice.
I assume you have read the first post in this thread. Calender age is not an absolute. Tires can fail that are only a week or month or year old if run overloaded, under-inflated or over speed. Trailer owners with ST type tires have a couple strikes against them. With few exceptions the tires selected by the RV company are the minimum acceptable for load capacity PLUS the suspension of multi-axle trailers impart significant overload shear forces on the tires at every turn or corner. This is called 'Interply Shear" and this force is trying to tear the belts off your tires.
Now I have covered how you can inspect your tires yourself in my blog. The video I reference shows the side to side movement as well as the out of round shape of the tread. If you find similar movement then in all probability the tire is in the process of failing. It may not come apart next week or in the next 100 miles but it will come apart in the not to distant future.
So review the instructions in my blog on inspection and watch the video to understand what to look for. While not finding the movement is not a 100% guarantee of no failure IMO finding the movement is almost certainly a 100% guarantee the tire is failing.

Also get and run TPMS on all trailer tires.
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