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Old 04-18-2014, 06:11 PM   #1
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New Twist to Tire Question

I know the rule of thumb is to replace tires after 7 yrs no matter if they still look new or have little miles on them. But let me ask you all this:

My 'new' 1985 Vogue has 10 tires, 2 front and 8 rear due to it being twin axled. It makes total sense to me to have new good tires on the front, but what about the rears which are 05's and that look great still. Do you have to be equally concerned about a blowout to a rear tire when there are 8 of them? If one did go flat or blew out, wouldn't the remaining 7 be safe enough to get you down the highway to the next tire shop. Or would you still be concerned about losing control if 1 of the 8 rears would go out on you?

Who wants to put their 2 cents in on this one?
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Old 04-18-2014, 06:22 PM   #2
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I would be more concerned about body damage with a tread coming off.
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Old 04-18-2014, 06:23 PM   #3
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I kind of agree with your line of thinking. Even with a regular coach with just four on the back. If you loose one you still have three to get you to a repair facility. That happened to me once when I hit a big hole and 300 miles later the tire was gone. It probably lost it's air when I hit the bad bump but i didn't know until the tire flew apart. When it did we just slowed down and got to the next exit and got a new tire.

One minor problem. If you had a TPMS and just removed the tire , slowed down you'd probably be OK. If you didn't know about the low tire when they do blow (sometimes) they do a lot of damage to the surrounding fiberglass.

I have also heard that the 7 year rule is a bit of a knee jerk reaction to the lawyer thing. Michelin will even perform re-treads on carcasses that are old but still in good shape. It really depends on how the tire was treated. Was it subjected to running several miles with low pressure overheating the tire and perhaps causing internal ply problems??

Ooops, I started posting before poster #2 posted. By the time I was done he got in ahead of me. Oh well at least we both came up with the same concern.

TeJay

Kind of like a CRAP SHOOT, you just take your chances.

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Old 04-18-2014, 06:31 PM   #4
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My rears are 7 years old and my fronts are 4 years old so I'm kind of in the same boat. I planed on buying 6 Bridgestons this spring but a leak in a $1200 radiator kind of smashed that plan.
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Old 04-18-2014, 06:42 PM   #5
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looking good on the outside has nothing to do with the inside ! and not worth placing your health in jeprody or others, or damage to your RV should a tire seperate.
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Old 04-18-2014, 07:24 PM   #6
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Quote:
Originally Posted by djbmsu View Post
looking good on the outside has nothing to do with the inside ! and not worth placing your health in jeprody or others, or damage to your RV should a tire seperate.
agree
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Old 04-18-2014, 07:43 PM   #7
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Front tires are a health thing. Rear tires are not, its just money. However a blowout on an outer rear can, as suggested, do several thousands in damage and sideline your rig for a month or two (or three, or four...) waiting on parts, paint, blah, blah, blah. At a moment's notice.

I've had two blowouts, both inner rear DS. I was lucky both times to get same day tire service. On a weekend, evening, or just at quitting time you're usually screwed. A long way from tire dealers, you are screwed unless you have the spare & just need it mounted which increases flexibility.

And when Good Sam sends somebody, make darn sure they know they are dealing w/22.5" tires that require truck tire service. They sent an booger eating moron w/inadequate tools & knowledge.
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Old 04-18-2014, 07:52 PM   #8
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Michelin's recommendation is to have a professional inspect the tires starting at 5 years and replacement at 10 years if no defects are found during the inspections. I have attached Michelin's recommendations for RV tire life.... http://www.michelinrvtires.com/miche...r-RV-Tires.pdf

As others have indicated the issue to be concerned with is damage if there is a blow out or failure resulting in tread separation.
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Old 04-18-2014, 09:08 PM   #9
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Huh...do you ever wonder how much force comes out of a blown tire at 65 MPH. If it is an inside dual it definately has enough force to rip apart an inside wheel well/refrifgerator or anything else that is in it's way when it blows. The damage that happens is "luck"....better to weight your odds and keep your tires fresh. I think the 7 year rule definatley carries some "fudge" room leaning to the manufacturer so you have to ananlyze the shape of your tires at 7 years. Better safe than sorry.
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Old 04-19-2014, 12:04 AM   #10
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Everybody tosses this blowout thing at 7yr and 10yr, these things can blowout the day you put them on. I drove truck for a living and if you take care of your tires, keep them covered when standing for months on end, make sure they are inflated properly at all times they are not going to explode at 7yr & 1 day or 10yr & 1 day. If I bought Michelin the company and told everyone they had to replace their tires every two years I bet there would be people on here swearing to people that is the proper thing to do. Man this gets old. Thanks for letting me vent.
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Old 04-19-2014, 01:36 AM   #11
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Quote:
Originally Posted by SissyBoyBob View Post
I know the rule of thumb is to replace tires after 7 yrs no matter if they still look new or have little miles on them.

Who wants to put their 2 cents in on this one?
My two cents ......... you stated you have 9 year old tires. Yes you can limp along on one dual with a flat beside it. Most RVs run near capacity so the extra tire is bearing way too much weight and damage will be done to that tire.

Not to mention the important stuff. With any blowout there is a chance of an accident. When a tire comes apart at highway speed, the debris may contact expensive and sometimes hard to get parts that always involve a delay getting repaired.

So we know the rule of thumb, have older tires than that, chance of damage, accident, delays, or maybe worse. All the best to you as you make your decision.
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Old 04-19-2014, 02:24 AM   #12
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I've had a couple of rear tire blowouts. In my first year of ownership I figured the tires looked fine and could probably get another year out of them. One did some cosmetic damage to the fender well and compartments. The other did some damage to electrical wiring. Didn't really effect handling at all and I was able to limp to a safe place to park. Received good ERA and was back on the road within a few hours.

But this was really not a fun experience for a family holiday. Lucky I carry a spare and was able to make it to my destination. After the first blowout I bought new steer tires and moved those to the tag after the second one I bought 6 new rears. I am pretty sure I'll be replacing them all at about 7 years

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Old 04-19-2014, 08:50 AM   #13
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And what about damage to your towed vehicle if you have a blowout in the rear? I saw what happened to a coach and the toad when a rear inside dual blew - that blowout took out the back end of the coach along with a lot of wiring and tore the toad apart in the front. He had pulled over to the side of the road with no power and we stopped to see if we could help. What a mess! I won't chance it - no way!
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Old 04-19-2014, 09:02 AM   #14
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I would suggest is depends on how you travel. If you have your whole family strapped in, and your racing from point A to point B for reservations. I would suggest you need to plan on high speed blow outs.. If your a full timer, retired and spend most of your time actually seeing the country from the back roads of America. Then you are good to go. Replace each pair of tires as one fails.....
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