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Old 02-25-2013, 11:11 AM   #1
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What is the rule of thumb for tire replacement?

I know you can't just go by thread condition. Someone told me he follows the 7 year plan no matter the number of miles put on the tires.
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Old 02-25-2013, 11:15 AM   #2
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I subscribe to the 7 year plan. Some will say 10 but that's pushing it.
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Old 02-25-2013, 11:26 AM   #3
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Thats pretty much the rule. 6 to 7 years and look for cracking in the sidewall. Mileage has no real impact on RV tires since the average miles driven per year is about 4500.
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Old 02-25-2013, 01:29 PM   #4
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Hi OswegoLion,
Michelin says 10 years. That is what I am following (if possible). There are some maintenance items one must do to help the 10 years become a reality.
1. keeping the PSI correct for the weight being carried
2. covering the tires when not in use
3. keeping the tires clean and dressed with the product of your choice
4. A happy tire is a rolling tire. I put 9 to 10K miles per year on the coach. Miles help the chemicals in the tire to stay distributed. 88K and going strong.

The bottom line is contact the manufacturer of the tires. Go by what they tell you. Everyone's situation is a bit different.
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Old 02-25-2013, 02:10 PM   #5
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I am absolutely anal about motorhome axle weights, side to side weight distribution, monitoring air pressure and protecting tires from UV as best I can. At five years and six years, tires are dismounted and examined closely for cracking, belt damage, etc. Tires are replaced at seven years, whether damaged, worn, or not. Some choose to replace at five, manufacturers typically say ten is possible. Whether you can go five years, ten years, or something in between has to be your decision based on your comfort level. It is your family riding on those tires.
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Old 02-25-2013, 02:16 PM   #6
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Michelin says to have the tires checked starting at the 5th year and absolutely replace at 10 years.
We got about 8 years out of ours with no trouble.
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Old 02-25-2013, 04:55 PM   #7
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Quote:
Originally Posted by Mr_D View Post
Michelin says to have the tires checked starting at the 5th year and absolutely replace at 10 years.
We got about 8 years out of ours with no trouble.
Good advice
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Old 02-26-2013, 07:41 AM   #8
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People replace at anywhere from 5 years to 15 years or more. Most thou replace in between 7 years and 10 years. Some won't wait past 5 years and some will only replace when they are actually worn down to when the tire shop says to replace.

When all is said and done it's all really just a personal preference.
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Old 02-26-2013, 09:19 AM   #9
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Somewhere around 7 years the risk of a catastrophic failure begins to get fairly high. Some would say unacceptably high. By 10 years, a failure is imminent at any time.

Pick your number in that range based on your own aversion to risk. The risk is not just the inconvenience of a blow-out - there is a more than a little possibility of damage to the coach body as well.
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Old 02-26-2013, 09:40 AM   #10
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Hi Gary RVRoamer,
" By 10 years, a failure is imminent at any time." Why do you say that?
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Old 02-26-2013, 11:03 AM   #11
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I had a set of 7 year old tires on my last Class A. When Gary says the catastrophic failure rate starts to get high, believe him. I had a blowout on an inside dual that took out some structural members underneath. It wasn't pretty.

Now, I've installed a TPMS system and am planning on replacement of my 2007 tires next spring.
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Old 02-26-2013, 05:20 PM   #12
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Hi topdownman,
My first coach was in 1978. That was back when bias play tires were in use. Between bias ply and Michelin radials, I've had many years of coach tire experience. Being a retired engineer, I'm always looking to "show me the data". I didn't go to 10 year tire replacement overnight. It was via my own personal experience. That being said, there are always exceptions. When I encounter an exception or learn something new (like seeing the backup data), I make a decision based on the facts.

There are many variables that determine when one should replace tires. I drive enough miles per year (keeps the chemicals distributed) and meticulously care for tires that I am comfortable with Michelin's for 10 years.
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