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RVing message boards => Motorhomes => Topic started by: arcticfox2005 on December 17, 2011, 10:45:23 AM

Title: Replacing Tires Due to Age?????
Post by: arcticfox2005 on December 17, 2011, 10:45:23 AM
We just bought a 2006 Tiffin Allegro on a Ford chassis with only 4000 miles on it. The Good Year load range F 19.5 tires were made in week 42 of 2005. I am familiar with the conventional wisdom of replacing tires after 7 years, but I wonder. The sidewalls are free of any surface cracks and needless to say, no tread wear. I asked a friend who is a retired Greyhound bus driver, and his take on it was to leave them on and just watch them closely. He said that if cracks develop at the margin of the sidewall and tread, to start looking for new ones because of the possibility of tread separation. What about this? He also said that Greyhound will not buy Michelin because of weak sidewalls - go with Good Year, Bridgestone, or Toyo. Opinions?????
Title: Re: Replacing Tires Due to Age?????
Post by: CarlGeo on December 17, 2011, 10:53:06 AM
I replaced tires on my MH at six (6) years old because of age.  All tires looked good, but read too many posts of blowouts with older tires. 
I had Toyo tires on the MH and replaced with Toyo's.  Good ride, quite and good price.  Tires are 255 R70 22.5 and paid less than $1900 for six (6) tires, out the door.  I have been very pleased with my Toyo tires and recommend them.
CarlGeo
Title: Re: Replacing Tires Due to Age?????
Post by: seilerbird on December 17, 2011, 11:02:37 AM
I think it would be foolish to keep on driving an RV on tires that were 7 years old, no matter what they look like on the outside. There is the way they look on the inside to consider also. A blowout on an RV is a whole different story than a blowout on a car. A blown out tire can do thousands of dollars of damage to a wheel well and things like hydraulic lines, brake lines, air lines, gas lines, etc. Just for the peace of mind alone it is worth getting new tires every 7 years.
Title: Re: Replacing Tires Due to Age?????
Post by: Clay L on December 17, 2011, 11:03:51 AM
Although my Michelins had good tread and no surface cracks I replaced them at seven years.

When they were installed I took the opportunity to have solid metal extension valve stems installed on the duals so adding and checking air is now very easy. They are made by DuallyValve and I got them from HERE (http://yourtireshopsupply.com/category/796/dually-valve-kits)
Title: Re: Replacing Tires Due to Age?????
Post by: Water Dog on December 17, 2011, 11:06:53 AM
I am very leery of old tires because we had a front blow out on properly inflated 7 year old tires that "looked" like new on our previous motorhome. Not only did the blow out cost us time, but it nearly took us into the median of the highway and also damaged generator parts (located a few feet behind it) as it came apart. I just replaced the tires on our "newer to us" motorhome that we just bought with 6 year old tires that looked good. We also replaced them with Toyo's and are very happy with the ride. Ours are 245/70R19.5   M143's. I would suggest that if you don't want to spend the money to replace all six tires, you might at least consider putting new ones on the front.
Title: Re: Replacing Tires Due to Age?????
Post by: BernieD on December 17, 2011, 01:09:52 PM
I asked a friend who is a retired Greyhound bus driver, and his take on it was to leave them on and just watch them closely. He said that if cracks develop at the margin of the sidewall and tread, to start looking for new ones because of the possibility of tread separation. What about this? He also said that Greyhound will not buy Michelin because of weak sidewalls - go with Good Year, Bridgestone, or Toyo. Opinions? ??? ?

Ask your friend how many miles Greyhound puts on it's tires each year and how frequently (time wise) do they replace them? Greyhound's tires probably wear out, motor home tires age out. I've put over 175,000 miles on 3 sets of Michelins. Never had a sidewall issue.
Title: Re: Replacing Tires Due to Age?????
Post by: carson on December 17, 2011, 01:21:22 PM
Just for fun, I wonder if "Myth Busters" would take this as a project.
  Whatever the outcome, nobody is going to fully agree with it. Myths are only in the mid of the believer.

  The mystery of  RV'ers opinions will stay intact.

Carson
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on December 17, 2011, 01:38:02 PM
You can't tell much about a tire's health from the outside. Obviously deep cracks are a bad sign, but no cracks or tiny cracks doesn't mean a whole lot. Dismounting the tires and looking at the inside of the carcass is a better measure, but that's fairly expensive.

The 4000 miles is itself a negative - tires need exercise for them to keep the rubber flexible and the chemical preservative moving around in the rubber. The metal cords in the body can also take a set if they stay too long in one position. Those tires would be in better shape if they had at lest 2500 miles/year on them.

Those tires may be good for up to 10 years, but the risk increases rather substantially in years 8-10 and the cost of a failure in terms of damage to the body of the coach (and maybe even your own body) can be high. There is no magic number for replacement - it's a classic "your mileage may vary" situation.   I can't tell you the right answer - can only advise you of the risks.

I too would be tempted to try to get another year out of them, but also would not be surprised to get a blowout while traveling [Definitely have roadside assist coverage].  How upset would you be to be stick on the side of the road somewhere and have to wait a couple hours while they find a tire and bring it out to you. Or if the body and wiring were damaged and the trip spoiled? It's a difficult tradeoff when big tires are so expensive.

The Greyhound guy has no experience at all in aged tires. Greyhound probably gets only a year from a set of tires before they have worn the tread away.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on December 17, 2011, 02:05:32 PM
That's why a lot of those tires are re-grove-able..tho I've never used them..did use re-treads on the drive tires...most trailers had them too.
Title: Re: Replacing Tires Due to Age?????
Post by: arcticfox2005 on December 18, 2011, 10:05:43 AM
Thanks for all your feedback. We live in Arizona and are currently in Branson - I will start shopping for new ones as soon as we get back home.
Title: Re: Replacing Tires Due to Age?????
Post by: 1joester2 on December 18, 2011, 01:11:22 PM
Good choice.

Let the sea of your pants talk to you about the tires until they are replaced. If they go anything like the ones I had, there is a very brief vibration before they let go. Just enough to make you wonder if you lost a wheel weight or if it might be the road.

When the first one went, I was at speed (70 mph just north of Daytona trying to keep up with traffic at night) and I didn't get stopped until there was some pretty heavy damage. Tires 2 and 3 were easier since I was paying closer attention and felt the vibration earlier on. I was able to stop safely and in time to prevent another wheel well from being destroyed.

Make sure the tires are up to pressure too.
Title: Re: Replacing Tires Due to Age?????
Post by: frederick on December 18, 2011, 01:47:28 PM
I wam up my MH and take it out on a short trip every other month in the
winter time. 
So it never sits more than two months at a time.  I hope this will excercise
the tires.  Better that sitting for 6 months.

Just my thought. :)
Title: Re: Replacing Tires Due to Age?????
Post by: ochidoc on December 18, 2011, 03:17:15 PM
We bought our 2005 Class A  last  spring , with original tires, 32,000 miles on it.   We set off on our first cross country road trip this summer, and agonized over whether or not to replace thge tires before we left.   With all the expense of getting the RV, and gearing up for the trip we decided not to replace.  We then spent 10 hours stranded in the nevada desert, with no cell service, after a blow out of the front drivers side tire.  Not only was the tire blown, and the vacation schedule shot,  the tire blew out ALL the hydraulics for the RV.  We had no slides, and no levelling jacks for the remainder of our trip.  It also blew out a wall of the storage bin nearest the tire.   The parts for the hydraulics had to be manufactured, so we camped all summer long in a rocking and rolling sardine can! .. AND, we have had the RV at the shop since October, it is now the end of December, and it is STILL not ready.  I suggest you replace the tires.  Thankfully no one was injured in the blowout, but.... the only good thing to come of it was that there was no sales tax in Oregon so we saved a nice chunk of change by buying six tires out there !

just my two cents.

   
Title: Re: Replacing Tires Due to Age?????
Post by: carson on December 18, 2011, 03:31:35 PM
I guess it's time to instal Kevlar® lining on every wheel-well. We need a lobbyist.
  What a waste of good money for a simple blow-out.

Title: Re: Replacing Tires Due to Age?????
Post by: Jim Godward on December 18, 2011, 06:13:33 PM
I guess it's time to instal Kevlar® lining on every wheel-well. We need a lobbyist.
  What a waste of good money for a simple blow-out.

Actually you need a pretty good steel liner well attached to the chassis and coach.  I bvelieve some models of the Newmar line had this but am not sure anymore.  Mine does not!!!!!!!!!!!!
Title: Re: Replacing Tires Due to Age?????
Post by: 1joester2 on December 18, 2011, 06:32:39 PM
Voice of experience:
Coachmen = NO

I would imagine you would need 1/4 inch steel plate wells mounted via I-Beam. In other words, something you could lift the vehicle by.


Flapping tread is heavy and at highway speeds carries quite a punch.
Title: Re: Replacing Tires Due to Age?????
Post by: arcticfox2005 on December 20, 2011, 08:44:30 PM
I started this whole thread and I want to expand on the Michelin thoughts. I had a new Bounder in early '93, and driving through Fountain Hills, AZ at 25 MPH, the sidewall of the right inner dual blew out. Sounded like a bomb. About 3 months later, another one on the rear blew out the sidewall on US89 north of Flagstaff, AZ. We then lost another one on the rear west of Edmonton, AB about 2 months after that. A tire dealer in Great Falls, MT got permission from the regional manager to swap them all out at that point (three blowouts on six almost new tires). We installed Toyos and never had another problem. Incidentally, we had the rig weighed after that (all four wheels individually) and we were well under the tire ratings weight-wise. A Michelin problem? Maybe, in spite of favorable experiences of others. It reinforces what my friend said relative to Greyhound and Michelins. Keep the comments coming - this is a topic important to us all.
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on December 20, 2011, 09:06:47 PM
If these vehicles are so vulnerable to a tire failure... maybe it's a doomed activity?  Age is only one factor in a very complex equation of factors that determine whether a tire fails or not.  I don't read any 18 wheeler forums, do the big trucks which carry 80,000 lb or more have these catastrophic failures?  Why bother?
Title: Re: Replacing Tires Due to Age?????
Post by: gwcowgill on December 20, 2011, 09:10:38 PM
I bought a Thor Pinnacle 1992 model in 1992 to live in while I rebuilt my house after hurricane ANdrew. The tires were Michilin made in 1991, don't remember the week now but in 1993 I blew the first tire and then in 1994 I had 2 more blow. I replaced them with Bridgestones and drove  the coach in until 1999.  I still believe the Michilins were defective and have never had Michilins on anything since.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on December 20, 2011, 09:25:38 PM
I ran Yokohama on the steers and Goodyear on the rears on my semi...never had a blow out but had a couple on the trailers I pulled...don't know which brand they were but do remember often they were Michelin's ...just an observation.
Title: Re: Replacing Tires Due to Age?????
Post by: Conquest aka Robert on December 20, 2011, 09:33:59 PM
Heres one for semi's having issues. http://www.centralillinoisnewscenter.com/news/local/Semi-Crash-On-I-474-Caused-By-Flat-Tire-135798218.html

I have had 1 broken belt 1 blowout and 1 just flat this year. I am a firm 7 years or less convert wallet be darned.
Title: Re: Replacing Tires Due to Age?????
Post by: Yondog on December 20, 2011, 10:12:34 PM
My tires are about 10-15 PSI under their limit. I checked them when the tires were cold. Is that well within safety limits? My tires are 22.5 and I believe they are supposed to be at 110 max
Title: Re: Replacing Tires Due to Age?????
Post by: skyking1 on December 21, 2011, 01:45:44 AM
trucks have blowouts, I have myself. The difference is, truck do wear out tires more often, they don't have any close fenders in the back and only the air brake components out by the wheel area. Those brake components can and do get trashed but are not as complex or expensive to repair as ochidoc's hydraulics.
All of my blown tires were non-events, no steer axles and no damage. 
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on December 21, 2011, 08:38:04 AM
Quote
My tires are about 10-15 PSI under their limit. I checked them when the tires were cold. Is that well within safety limits? My tires are 22.5 and I believe they are supposed to be at 110 max

Yes, that's a good weight range to be in.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on December 26, 2011, 09:30:36 PM
Well I have to revise my posting.....
I can no longer say I've never had a steer axle tire blow out ....
the date code had 049 as the numerals in it...making it the 4th week of 2009 if I read it correctly..
checking out new steer tires this week...Costco my first look see.
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on December 26, 2011, 10:28:06 PM
A three digit date code means it is from before year 2000, so that tire is most likely from week 04 of 1999. Well past retirement, I'd say.

You can read up on tire date codes in the RVForum Glossary under Tire Manufacturing Date Codes.

http://www.rvforum.net/SMF_forum/index.php?action=Glossary#Tire%20Manufacturing%20Date%20Codes
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on December 27, 2011, 12:59:32 AM
Does the tire age basis for buying new tires apply to cars, pickups, wheelbarrows, bicycles, tractors, go karts, atv's, motorcycles, show cars, etc?  What about spare tires laying on the shelf?  Just curious.
Title: Re: Replacing Tires Due to Age?????
Post by: Ned on December 27, 2011, 07:07:16 AM
Smaller vehicle tires tend to wear out before they age out.  Spare tires age just like tires in use, even quicker if they aren't being exercised by use.
Title: Re: Replacing Tires Due to Age?????
Post by: docj on December 27, 2011, 08:27:20 AM
Does the tire age basis for buying new tires apply to cars, pickups, wheelbarrows, bicycles, tractors, go karts, atv's, motorcycles, show cars, etc?  What about spare tires laying on the shelf?  Just curious.

Yes, tires age even if they're not being used.  Most vehicle tires get worn out before they get too old, but tires aging on shelves is a real concern.  It's important for RVers to check the age of new tires they purchase because they will need every month of life they can get.
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on December 27, 2011, 09:03:49 AM
Smaller vehicle tires tend to wear out before they age out.  Spare tires age just like tires in use, even quicker if they aren't being exercised by use.

The "spare" tire on our car is a really small tire compared to the regular tires.  It's never even touched the ground.  It gets no sun, it's in a wheel well, never to be seen.  It would never occur to me that it should be replaced at 5 years.   I guess that's why we have CoachNet?
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on December 27, 2011, 09:05:03 AM
A three digit date code means it is from before year 2000, so that tire is most likely from week 04 of 1999. Well past retirement, I'd say.

You can read up on tire date codes in the RVForum Glossary under Tire Manufacturing Date Codes.

http://www.rvforum.net/SMF_forum/index.php?action=Glossary#Tire%20Manufacturing%20Date%20Codes

Gary, Thanks...
Date code's are on the inside so I will have them checked...It's a wonder I did as well as I did..Guess it's bite the bullet time this week...ouch..oh well, the next blow out might put me into a bad situation I didn't want to be in..I'm going to go across the Chesapeake Bay Bridge & Tunnel for the trip back & a blow out on that would be a bad day happening for sure...
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on December 27, 2011, 09:58:00 AM
A spare will probably last 7 years, maybe as much as 10.  But it is a fairly common thing for someone to put on an old spare, still looking new, and have it fail within 15-30 miles. If you have a full size spare, it is wise to exchange it occasionally with another tire, so that it gets some use. That actually help the tire aging process.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on December 28, 2011, 05:19:04 PM
The local tire shop said the Bridgestone tires were made in April of '09 ...sidewalls cracking ...nowhere could I get Michelin or or Bridgestone before the second week of January ...and that just wont work...got a pair of Chinese tires put on ...made in China doesn't always mean cheap to buy!! Gonna keep my fingers crossed...Maybe I'll have good luck w/them..
Title: Re: Replacing Tires Due to Age?????
Post by: thedoc on December 28, 2011, 05:30:55 PM
In the past, I had blowouts twice  from old tires that looked very good. Both were bought used at garage sales. One of the blowouts took a good chunk out of the rear quarter panel of the van I had at the time. Since that time, I would never continue using a tire after 7 years old especially on a motorhome. A blowout at highway speeds could be disasterous. In fact, my current policy is to replace tires somewhere between 5 and 7 years old.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on January 05, 2012, 07:26:25 PM
The local tire shop said the Bridgestone tires were made in April of '09 ...sidewalls cracking ...nowhere could I get Michelin or or Bridgestone before the second week of January ...and that just wont work...got a pair of Chinese tires put on ...made in China doesn't always mean cheap to buy!! Gonna keep my fingers crossed...Maybe I'll have good luck w/them..

Update: I was lied to again. the tires in question were made in 99. Blew a rear inside duel in Maryland..limped to a Goodyear dealer in Delaware who had a set and installed them. Good guys on hgwy 13 just north of the Maryland state line. If he had had 2 more I would have changed the other set..but those are not Bridgestone and I hope will make it the last leg of this trip..then they too will be replaced,I really hate blow-outs, would have been ugly in the tunnel..whew..but man was that a cool ride across all that water.
Title: Re: Replacing Tires Due to Age?????
Post by: Ned on January 05, 2012, 07:42:09 PM
Hindsight now, but the quick way to tell the difference between 1999 and 2009 tires is the 1999 tires would have a 3 digit date code and the 2009 tires a 4 digit code.
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on January 05, 2012, 08:43:22 PM
here's some info from the FMCA:  (who and how much is an inspection?)

How Old Are Your Tires?

Molded into the sidewall of every tire manufactured is a code that indicates when and where the tire was manufactured. This code is required by the United States Department of Transportation, and the identification number starts with the letters “DOT.”  The two digits following the letters DOT indicate the plant where the tire was made.  The last group of numbers — a four-digit code — is the one that discloses the week and year of manufacture.  The weeks of the year are numbered consecutively, and the last two digits of the year are included.  So, for instance, the code 4711 indicates that the tire was manufactured during the 47th week of 2011, specifically, the week of November 21.

This information is especially important for the owners of motorhomes. Motorhomes aren’t always driven as many miles as the typical passenger car, so motorhome tires often wear out as a result of age-related issues rather than mileage. Because so many variables are involved, it is not possible to provide a replacement date based simply on the calendar.  So, motorhome owners need to keep their tires properly inflated and also have them inspected regularly by a tire professional, such as a dealer. Once a motorhome tire reaches 5 years of age, it should be inspected at least once a year by a tire professional for signs of wear and aging that would indicate the need for replacement. Most motorhome tires will need to be replaced before they reach 10 years from the date of manufacture, but, if not, they definitely should be replaced at this point as a safety rule, even if they still appear to be serviceable.
Title: Re: Replacing Tires Due to Age?????
Post by: Icemaker on January 06, 2012, 05:02:07 AM
Hindsight seems to run my life. I'm a believer now. Going to order a tire pressure monitor system when I get back home. Evan for the toad.
I learn so much on this site. Thanks.
Title: Re: Replacing Tires Due to Age?????
Post by: pojo on January 06, 2012, 06:45:07 AM
Just replaced the 2004 vintage 235-80r-22.5 Michelins on our MH. Purchased them at our local farm tire supplier. Mounted, balanced with Counteract, out the door for $508 each! The date code on the new tires are 5211!  I believe these tires were still a bit warm when they were delivered to the dealer. The removed tires looked as good as the new ones except for the date code. I feel very comfortable with these new tires!
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 06, 2012, 08:59:05 AM
How about two new tires on the front (not that I think you need them), and now you could keep the old fronts for spares if the rig did not come with one. My guess would be that 90% or more of our so called BLOW OUTS are caused by slow leaks in a tire (nail/screw), as you drive down the road the tire slowly looses pressure which in turn causes the side wall to flex excessively , this generates a lot of heat, as the air pressure drops the flex goes up as does the heat. After a while the rubber inside the tire starts to disintegrate and literally starts crumbling under the flexing and the heat, ultimately with the inside of the tire falling apart as you drive, the side wall fails, boom, blow out. New tires fail the same way as old tires. I would say that tire air pressure monitoring (with a alarm) would be money better spent then throwing out almost new tires. JMHO
Title: Re: Replacing Tires Due to Age?????
Post by: Water Dog on January 06, 2012, 09:27:56 AM
How about two new tires on the front (not that I think you need them), and now you could keep the old fronts for spares if the rig did not come with one. My guess would be that 90% or more of our so called BLOW OUTS are caused by slow leaks in a tire (nail/screw), as you drive down the road the tire slowly looses pressure which in turn causes the side wall to flex excessively , this generates a lot of heat, as the air pressure drops the flex goes up as does the heat. After a while the rubber inside the tire starts to disintegrate and literally starts crumbling under the flexing and the heat, ultimately with the inside of the tire falling apart as you drive, the side wall fails, boom, blow out. New tires fail the same way as old tires. I would say that tire air pressure monitoring (with a alarm) would be money better spent then throwing out almost new tires. JMHO

A good example of rubber deteriorating with age is to go to an office store and buy a bag of rubber bands and after about 6 or 7 years pull a new one out of your desk drawer and try to use it. I know first hand from my own blow out experience that tires do break down with age, and while I believe that proper tire pressure is critical and that TPMS is a good idea, tire age is a major contributor to blow outs.
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 06, 2012, 10:53:02 AM
Who said rubber does not deteriorate, and no its not a good example.
Title: Re: Replacing Tires Due to Age?????
Post by: Water Dog on January 06, 2012, 11:42:30 AM
Who said rubber does not deteriorate, and no its not a good example.

Sorry if I chose the wrong words Mark, I did not mean to infer that you said that rubber does not deteriorate, I was merely using your post as a jumping off point to stress my point about the problem with tire age. While the rubber band analogy isn't perfect, they do crack and dry out much like the rubber in tires after time, especially with a lot of non-use.
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 06, 2012, 11:55:43 AM
Hope this works, can anyone recommend a tire pressure monitor system that can be added to a coach 22.5 tires?



http://www.youtube.com/watch?v=1ThwsyjLXcM&feature=player_detailpage

http://www.youtube.com/watch?v=1ThwsyjLXcM
Title: Re: Replacing Tires Due to Age?????
Post by: Ned on January 06, 2012, 12:13:04 PM
Any of the TPMS can be used on 22.5" tires.  Many here recommend Pressure Pro.
Title: Re: Replacing Tires Due to Age?????
Post by: ArdraF on January 06, 2012, 04:49:27 PM
We have Pressure Pro sensors on all motorhome tires (8 total) plus the toad tires.  We've already been glad to have PP because a toad tire got a puncture near Chatanooga and deflated almost instantly.  The audible alarm told us something was wrong and it took about 1/4 mile to pull off to the side of the freeway.  It was totally flat by then.  So get a TPMS as soon as you can.  They're worth every penny!

ArdraF
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 08, 2012, 07:57:51 PM
We have Pressure Pro sensors on all motorhome tires (8 total) plus the toad tires.  We've already been glad to have PP because a toad tire got a puncture near Chatanooga and deflated almost instantly.  The audible alarm told us something was wrong and it took about 1/4 mile to pull off to the side of the freeway.  It was totally flat by then.  So get a TPMS as soon as you can.  They're worth every penny!

ArdraF



I also got a flat on my toad, I was moving from Colorado Springs to NY driving a rental truck towing my 1967 Ford Galaxie with brand new snow tires. By the time I saw the blue smoke in the mirror and pulled over it was too late to fix the flat. The tire looked like a hairy doughnut with one patch of tire tread (the size of your hand) hanging on the fabric. This is the great part, I brought the tire to a Goodyear dealer in NY and the dealer looked at the tire and measured the depth of the tread on the little patch of remaining rubber and called Goodyear support to get approval to replace the tire, they said OK give him a new tire no charge. Goodyear asked the dealer to save the tire so they could give it to their technical people, the dealer said he would put it in a envelope and leave it at the front desk. you had to be there but it was hilarious. Funny thing is I did not go to the dealer to get a warranty, just to buy a new tire.

This happened in 1974.
Title: Re: Replacing Tires Due to Age?????
Post by: gwcowgill on January 08, 2012, 08:30:00 PM
We were not as fortunate on a blowout on a Toad. In 1974 we were towing our Saturn behind an old MH when a Semi pulled alongside blowing his horn and pointing to the Toad. By the time I was able to stop along side I-79 in WV the damage to the Toad was $1200.63 plus the cost of a new tire. We now use the Tattle Tale on the Toad and TST TPMS on the coach. Well worth the money...... :)
Title: Re: Replacing Tires Due to Age?????
Post by: Charlie Two Tracks on January 09, 2012, 06:31:56 PM
I work on the Interstate (I-80) everyday and a lot of the time I am on road patrol, picking up dead animals and trash. Just today, I was picking up rubber off the road and shoulder for over a mile. Up ahead was a trailer with both passenger tires gone and the rims rounded off. The other two tires on the trailer were showing signs of age. Just today, I picked up seven tires that had blown. Four of them were semi tires. I have the Pressure Pro on my MH. They are good for a slow leak or if one of the duals goes down. If you hit a piece of steel in the road and have a blow out, know how to handle your rig. I do not have old tires. It just isn't worth it in my opinion.
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 09, 2012, 06:58:43 PM
 "a trailer with both passenger tires gone and the rims rounded off"

Most of my rims are round, before I get flats! ::)

Loosing a tire on trailers with normal leaf spring configuration does not change the weight on the adjacent axle/ tire, so loosing one tire should not cause another tire to blow from overload, more likely the second tire ran over the object that the first tire hit.
Title: Re: Replacing Tires Due to Age?????
Post by: Larry N. on January 10, 2012, 07:27:45 AM
I expect he's talking about the two tires on a set of duals, Mark, not on separate axles. Losing one puts twice the load on the remaining tire.
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 10, 2012, 09:22:57 AM
Trailers don't have duels ,do they?
Title: Re: Replacing Tires Due to Age?????
Post by: Larry N. on January 10, 2012, 09:53:22 AM
Semi trailers do...
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on January 10, 2012, 10:24:42 AM
Just in case anyone is prone to buying safety equipment based on stastical data, here are some data:


leading causes of death:
Heart disease: 616,067
Cancer: 562,875
Stroke (cerebrovascular diseases): 135,952
Chronic lower respiratory diseases: 127,924
Accidents (unintentional injuries): 123,706
Alzheimer's disease: 74,632
Diabetes: 71,382
Influenza and Pneumonia: 52,717
Nephritis, nephrotic syndrome, and nephrosis: 46,448
Septicemia: 34,828

Death by Accidents:
All unintentional injury deaths
Number of deaths: 123,706

Unintentional falls: 22,631

Motor vehicle traffic deaths: 42,031

Unintentional poisoning deaths: 29,846


Motor Vehicle deaths

About 50% Alcohol related
About 25% Distractions like cell phones, GPS, maps, texting, eating, etc
About 25% other, like equipment, roads, TOD, type of road

brakes and tires are important, but... probably not the first priority for investments.

Easy ways to give yourself much higher odds:

take care of your heart, dodge the cancer bullets, dodge the stroke bullets, get a flu shot, use hand rails so you don't fall, watch what poisons you eat, turn off the cell phones when driving, don't drink alchohol when you might drive, do your maintenance regularly, stay awake, no speeding, etc.  Somewhere way down the list, is TPMS.

Just sayin' 
Title: Re: Replacing Tires Due to Age?????
Post by: Just Lou on January 10, 2012, 10:32:30 AM
The only thing that proves is that statistics can be made to say what you want them to say....
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 10, 2012, 11:34:56 AM
Semi trailers do...

True, I have to widen my thinking, I was thinking travel trailers. Got me.
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 10, 2012, 11:42:28 AM


" take care of your heart, dodge the cancer bullets, dodge the stroke bullets, get a flu shot, use hand rails so you don't fall, watch what poisons you eat, turn off the cell phones when driving, don't drink alchohol when you might drive, do your maintenance regularly, stay awake, no speeding, etc.  Somewhere way down the list, is TPMS. "



Tao, it does put old tires and tire pressure in proper prospective. :o
Title: Re: Replacing Tires Due to Age?????
Post by: Ned on January 10, 2012, 12:17:18 PM
All of that is irrelevant with respect to a TPMS.  A TPMS will, most often, catch a tire failure before it becomes catastrophic, and save you from significant damage or even an accident.  It won't prevent health problems :(
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 10, 2012, 01:23:57 PM
Ned the primary  reason I want to  buy a tpms is to prevent health problems!
Title: Re: Replacing Tires Due to Age?????
Post by: Ned on January 10, 2012, 01:31:50 PM
Ned the primary  reason I want to  buy a tpms is to prevent health problems!

Maybe you can mount a sensor to monitor your blood pressure.
Title: Re: Replacing Tires Due to Age?????
Post by: gwcowgill on January 10, 2012, 05:50:17 PM
It can certainly prevent health problems caused by collision!
Title: Re: Replacing Tires Due to Age?????
Post by: Mark R. on January 10, 2012, 06:36:39 PM
That is what I was thinking. :D
Title: Re: Replacing Tires Due to Age?????
Post by: Lou Schneider on January 10, 2012, 08:42:10 PM
If a TPMS prevents a blowout, it's not part of the statistics.
Title: Re: Replacing Tires Due to Age?????
Post by: taoshum on January 10, 2012, 11:06:47 PM
If a TPMS prevents a blowout, it's not part of the statistics.

Neither is medication for hyper-tension?  Or not breathing asbestos?  Soooo?
Title: Re: Replacing Tires Due to Age?????
Post by: Charlie Two Tracks on January 11, 2012, 06:14:02 AM
I guess I needed to explain myself better. The steel rims were bent so that they were flush with the inside bottom part of the rim. (not good) and if you loose a tire on one side, the other tire is the only thing holding that side of the trailer. I would think that there is more weight on the remaining tire. Anyway, the tires were old and blew. Happens every day. I hate it when I am picking up parts of some one's RV out there.
Title: Re: Replacing Tires Due to Age?????
Post by: dirko on January 12, 2012, 06:45:08 PM
Hi Ho:  Does anyone have anything except anecdotal information that relates number of blowouts to tire age?   I expected to find some data but have not been able.   I would really like to know what the relationship is if there is one.

Thanks.
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on January 12, 2012, 07:45:36 PM
Nope - even the tire companies don't have (or at least don't publish) and real data on the frequency of blowouts with age. So we are all guessing when we pick an age and say "the risk gets too high after x years".  And trailer tires seem to fail years earlier than  motorhome tires too. 
Title: Re: Replacing Tires Due to Age?????
Post by: Art In Mobile on January 12, 2012, 07:52:39 PM
Here is some good info on my blowout rt front at 65 MPH on I-10 in Beaumont Texas. First let me say the blowout was a big bang another words all at once so the sensors on the tire would not have helped in this case. The coach was weighed & NOT over weight. Low milage on tires & right around 6 years old. The inside sidewall is the blow out area. So I can't blame it on UV deterioration. When I got home look what I found on the Left front tire inside wall! I bought 6 new tires. I want to also say the 35 foot Winnebago handled very well and after that VERY loud bang all the cars on the right side of me got out of the way PRONTO so I could make it to the right side of the road. When pieces of tire are flinging off your MH they tend to let you have any lane you want. If you Handel it right it is not a problem. How many police chases have we seen on the TV with tires shot out or burnt out  the crooks still handling them at very high speeds.  I have had a CDL license from day one when they were mandated. Please remember you can still steer on a rim. All I am trying to say is don't panic  just keep flying the plane! (I also am a pilot) See tire photos notice date codes
Title: Re: Replacing Tires Due to Age?????
Post by: emedic99 on January 18, 2012, 11:45:59 AM
IMHO, (firefighter/paramedic), motorhome tires are nothing to mess with.  Besides the driver, who is actually wearing a seatbelt at any one time while they are in the motorhome?  In my experience I have to constantly remind my passengers to buckle up.  A tire blow out, especially on the front, can cause severe damage and loss of life.  Lose control and thats all she wrote. 

If you are like most, your motorhome tires need replaced due to age not tread wear.  I don't put 60,000 miles on them in 7 years.

There are 2 main culprits of tire deteriation:  Ozone and UV rays.  We can't do much about the ozone but the UV we can help with.  Keep those tires covered when not in motion, especially in storage.
Title: Re: Replacing Tires Due to Age?????
Post by: matt.brown3 on January 18, 2012, 09:42:24 PM
Not only do you need to replace tires, but also change all your fluids, oil, coolant, tranny, etc.  A 2005 rig with only 4k miles  has sat for a long time and bad things happen to those fluids after years of sitting in a reservoir. Water has a miraculous way of finding its way in and they tend to breakdown and loose their effectiveness.  It may cost a couple thousand dollars now, but that's a lot better than several thousand dollars later.  I bought a used 2005 31' Gulfstream V10 with only 13k miles this past spring.  Tires had lots of tread but also lots of cracks.  I put 6 new michelins on her for about $2000, changed all the fluids at a cost of about $500.  I drove her from onside of Texas to the other and back pulling a toad to boot without as much as a hiccup.  I run her up to about 60-65 mph and keep it safe and steady; no mountains in the Texas, though, I am curious how the V10 does pulling a 3000 lb toad on mountain grades. I'm retired and no hurries here...Praise God! 

First motorhome and love it.  Looking at some diesel pushers now. 

Matt Brown
Moved link to signature line.
Title: Re: Replacing Tires Due to Age?????
Post by: bucks2 on January 18, 2012, 10:05:10 PM
I just can't help but point out that I've been told repeatedly that Over The Road trucks wear out tires and RV's age out tires. Now you guys are saying that tire pressure is important and that maybe running a tire under inflated on either type of rig might cause failure? Some of you are even saying that road hazards cause failure on both types of rigs. 

What an interesting world we live in.

Ken
Title: Re: Replacing Tires Due to Age?????
Post by: Just Lou on January 18, 2012, 11:36:54 PM
I just can't help but point out that I've been told repeatedly that Over The Road trucks wear out tires and RV's age out tires. Now you guys are saying that tire pressure is important and that maybe running a tire under inflated on either type of rig might cause failure? Some of you are even saying that road hazards cause failure on both types of rigs. 

What an interesting world we live in.

Ken

Are you saying that there are some conflicts between any of those statements?  I don't see any.
Title: Re: Replacing Tires Due to Age?????
Post by: BernieD on January 19, 2012, 10:23:57 AM
Strong agreement with Lou.

When you run your tires under inflated, 2 bad things happen. First you lose carrying capacity, the air pressure in your tires is what supports the weight put on them. Simply, more pressure, higher carrying capacity.

Then, an under inflated tire flexes much more as you drive. This flexing increases heat in the tire and damage to the carcass.

Should there have been a  ;D after your last 2 sentences?
Title: Re: Replacing Tires Due to Age?????
Post by: Jeff on January 19, 2012, 12:25:08 PM
During price negation over our last set of Goodyears for our m/h that were 12-14 months old on the shelf I asked if Goodyear would extend their 5 year warranty to reflect the shelf time of the tires?


 Purcell called Goodyear and the answer was no which I believe shows the OEMs are aware of the age life of their tires.
Title: Re: Replacing Tires Due to Age?????
Post by: bucks2 on January 19, 2012, 01:59:31 PM
Strong agreement with Lou.

When you run your tires under inflated, 2 bad things happen. First you lose carrying capacity, the air pressure in your tires is what supports the weight put on them. Simply, more pressure, higher carrying capacity.

Then, an under inflated tire flexes much more as you drive. This flexing increases heat in the tire and damage to the carcass.

Should there have been a  ;D after your last 2 sentences?

In the thread I noted that some of the things that caused failure in OTR also caused failure in RV's. Tire failures in RV's and OTR's were more similar than dissimilar. I was corrected. OTR wear tires out and RV's age them out there are no similarities between the failures. I maintained that RV's and OTR's both had failures from underinflation, road hazard and age. OTR's recaps can fail from age related causes. Other posters were adament that wasn't the case.
Title: Re: Replacing Tires Due to Age?????
Post by: Jarlaxle on January 28, 2012, 06:50:38 AM
I guess I shouldn't mention one of the trailers at work...it's an elderly 28' pup, I think a 1972.  It still has manual slack adjusters, has no spring brakes (there is a tag above the landing gear crank, "TRAILER MUST BE CHOCKED", and still runs lock-ring wheels with 10.00-20 tires.  The ones on there are made by Union & New Pride, with dates from 1997 and 1999.  It comes in three times a week, loaded to the gills and heavy, running 75+ miles (loaded) on the highway at 65MPH every time.  Haven't lost a tire on it in the six years I have been there.
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on January 28, 2012, 09:16:01 AM
Just one of those 10.00/20 tires can probably support near the entire weight of that trailer, so they are probably loafing no matter how heavy that trailer is loaded.

The 7 year number isn't magic, and the typical trailer tire probably doesn't even last that long. I think that's because most trailer tires are being run at/near their max load all the time, so they have no safety margin.
Title: Re: Replacing Tires Due to Age?????
Post by: Jarlaxle on January 28, 2012, 12:52:01 PM
Not even close.  A 10.00-20 has about the same capacity as an 11R22.5 or 295/75R22.5--the trailer comes in loaded to the roof every time it goes out,m plus the thousand pounds of power liftgate hanging off the back.  The trailer is about 8000lbs empty, ~30,000lbs loaded.
Title: Re: Replacing Tires Due to Age?????
Post by: Gary RV_Wizard on January 28, 2012, 04:44:55 PM
I guess that's not an RV, then! Around here, "pup" usually means a pop-up type trailer. But they don't usually run to 28 ft either.
Title: Re: Replacing Tires Due to Age?????
Post by: arcticfox2005 on January 30, 2012, 05:39:45 PM
Quote
Trailers don't have duels ,do they?

At least one model of fifth-wheels do - saw one at Star Valley Ranch RV Park in Wyoming. A large expensive one, the full-timer type. Don't remember the brand.
Title: Re: Replacing Tires Due to Age?????
Post by: donandmax on January 31, 2012, 09:22:22 AM
I wam up my MH and take it out on a short trip every other month in the
winter time. 
So it never sits more than two months at a time.  I hope this will excercise
the tires.  Better that sitting for 6 months.

Just my thought. :)
X2 only every month we take it shopping Wal Mart etc to give it exercise
Title: Re: Replacing Tires Due to Age?????
Post by: Butch72 on January 31, 2012, 11:14:26 AM
At least one model of fifth-wheels do - saw one at Star Valley Ranch RV Park in Wyoming. A large expensive one, the full-timer type. Don't remember the brand.

  The only one that I'm aware of is the"Mountain Aire" 5er by Newmar.............
Title: Re: Replacing Tires Due to Age?????
Post by: Butch72 on January 31, 2012, 11:32:26 AM
   We purchased our present MH, a pre-owned 2007 Diplomat, last July,2011, and we are planning on replacing all the
 tires this April 2012. They are not cheap by any means, but the peace of mind of having new tires under you for our future travels is just one less item to be concerned about. The tires will be six years old mid 2012, with about 32,000 miles on them.
As we have no maintenance service records, we also will have a total engine, trans, & generator service also this spring...2012. Then we will know what was done and when.........