Home » Public Forums » GMCnet » Re: [GMCnet] Tire age advise
| Re: [GMCnet] Tire age advise [message #346930] |
Tue, 27 August 2019 12:25  |
THOMAS R WHITTON
Messages: 47
Registered: September 2016
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I have 16" Firestone, E-range, tires on the coach that will be 6-years old this December (6-years from manufacturing date). They have about 1,500 miles on them and have spent almost their entire life in a dark garage while we were downsizing to a smaller home and taking care of health issues. We're now ready to take some GMC trips. Given the history of these tires, what do you guys think? Replace or use?
Tom Whitton26 foot updated GMCPaducah, KY
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| Re: [GMCnet] Tire age advise [message #346932 is a reply to message #346930] |
Tue, 27 August 2019 12:32  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Tom,
The "experiment" I reported is on tires that replaced Firestones that were
almost exactly 5 years from their date of manufacture. One of them had
already shed the tread about 3 years ago. I WILL NOT run tires over 5
years old. Period.
You might get lucky, but do you really want to gamble on the $2000+ that it
generally costs for the fiberglass damage when a tread lets go at speed?
But then, my NEW Westlakes may be even worse! :-(
Ken H.
On Tue, Aug 27, 2019 at 1:25 PM THOMAS R WHITTON via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I have 16" Firestone, E-range, tires on the coach that will be 6-years old
> this December (6-years from manufacturing date). They have about 1,500
> miles on them and have spent almost their entire life in a dark garage
> while we were downsizing to a smaller home and taking care of health
> issues. We're now ready to take some GMC trips. Given the history of
> these tires, what do you guys think? Replace or use?
> Tom Whitton26 foot updated GMCPaducah, KY
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Tire age advise [message #346934 is a reply to message #346930] |
Tue, 27 August 2019 12:56 |
Rob
Messages: 651
Registered: November 2013
Location: Victoria, BC
Karma: 3
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If money is no object - many here will say replace them.
For me - I'd likely continue to run them for a season or two (depending on how regularly they've been used). My tires are getting older - I'll need to replace them early next season? I think they have a late 2011 date code. But my tires are not baked in the sun like some are down south and they get used pretty regularly. Sitting for long periods is not good for tires...
For another data point, Michelin suggests a 10 year lifespan for RV tires:
https://www.michelinb2b.com/wps/b2bcontent/PDF/RV_Tires_Brochure.pdf
So YMMV!
Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath
> On Aug 27, 2019, at 10:25 AM, THOMAS R WHITTON via Gmclist wrote:
>
> I have 16" Firestone, E-range, tires on the coach that will be 6-years old this December (6-years from manufacturing date). They have about 1,500 miles on them and have spent almost their entire life in a dark garage while we were downsizing to a smaller home and taking care of health issues. We're now ready to take some GMC trips. Given the history of these tires, what do you guys think? Replace or use?
> Tom Whitton26 foot updated GMCPaducah, KY
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Rob -
Victoria, BC -
76 Royale - Rear Twins/Dry Bath
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| Re: [GMCnet] Tire age advise [message #346938 is a reply to message #346934] |
Tue, 27 August 2019 13:07 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Spin the wheel, ladies and gents, spin the wheel. Place your best, place
your bets. Having a blowout and tearing up the molded sheet
compound on the side of the coach is NOT THE WORST THING that could happen.
People riding in the coach, as well as in other vehicles near it when a
tire lets go are at risk.
Jim Hupy
Salem, Oregon
On Tue, Aug 27, 2019, 10:57 AM Rob via Gmclist
wrote:
> If money is no object - many here will say replace them.
>
> For me - I'd likely continue to run them for a season or two (depending on
> how regularly they've been used). My tires are getting older - I'll need to
> replace them early next season? I think they have a late 2011 date code.
> But my tires are not baked in the sun like some are down south and they get
> used pretty regularly. Sitting for long periods is not good for tires...
>
> For another data point, Michelin suggests a 10 year lifespan for RV tires:
>
> https://www.michelinb2b.com/wps/b2bcontent/PDF/RV_Tires_Brochure.pdf
>
> So YMMV!
>
> Rob
> Victoria, BC
> 76 Royale - Rear Twins/Dry Bath
>
>> On Aug 27, 2019, at 10:25 AM, THOMAS R WHITTON via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> I have 16" Firestone, E-range, tires on the coach that will be 6-years
> old this December (6-years from manufacturing date). They have about 1,500
> miles on them and have spent almost their entire life in a dark garage
> while we were downsizing to a smaller home and taking care of health
> issues. We're now ready to take some GMC trips. Given the history of
> these tires, what do you guys think? Replace or use?
>> Tom Whitton26 foot updated GMCPaducah, KY
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Tire age advise [message #346942 is a reply to message #346934] |
Tue, 27 August 2019 14:39 |
TR 1
Messages: 348
Registered: August 2015
Location: DFW
Karma: -7
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Rob wrote on Tue, 27 August 2019 12:56
For another data point, Michelin suggests a 10 year lifespan for RV tires:
https://www.michelinb2b.com/wps/b2bcontent/PDF/RV_Tires_Brochure.pdf
I'll "Spin the Wheel" on a 10 year old Michelin over an new, but untried, lower quality tire any day....
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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| Re: [GMCnet] Tire age advise [message #346943 is a reply to message #346942] |
Tue, 27 August 2019 14:59 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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You DID read Emery's post about having a 7 yo and a 4 yo Michelin blow with
NO load, didn't you?
Ken H.
On Tue, Aug 27, 2019 at 3:39 PM Mark Sawyer via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Rob wrote on Tue, 27 August 2019 12:56
>> For another data point, Michelin suggests a 10 year lifespan for RV
> tires:
>>
>> https://www.michelinb2b.com/wps/b2bcontent/PDF/RV_Tires_Brochure.pdf
>
> I'll "Spin the Wheel" on a 10 year old Michelin over an new, but untried,
> lower quality tire any day....
>
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Tire age advise [message #346944 is a reply to message #346930] |
Tue, 27 August 2019 15:32 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I did mine a year apart over 3 years in pairs. Directly the first pair will be coming up, I go seven years from date on the tire. Local ghuy - second and third generation - sells me Coopers at whatever the bigf box places get and rotate - balance as long as there's tread on it.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Tire age advise [message #346949 is a reply to message #346930] |
Tue, 27 August 2019 19:11 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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IF they have been out of the UV as you say, and IF they have never been run under inflated, and IF there is no visible cracking i would run them up to the 7 year point. 1500 miles is a new tire as far as road use, just not the clock.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Tire age advise [message #346964 is a reply to message #346943] |
Wed, 28 August 2019 10:11 |
TR 1
Messages: 348
Registered: August 2015
Location: DFW
Karma: -7
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Senior Member |
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Ken Henderson wrote on Tue, 27 August 2019 14:59You DID read Emery's post about having a 7 yo and a 4 yo Michelin blow with
NO load, didn't you?
Ken H.
I did not see that, Ken. Do you have a link to the post? I tried searching the forum, but did not find it... I'd like to see what tires he was running and the details....
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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| Re: [GMCnet] Tire age advise [message #346966 is a reply to message #346930] |
Wed, 28 August 2019 11:02 |
TR 1
Messages: 348
Registered: August 2015
Location: DFW
Karma: -7
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Senior Member |
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This topic is similar to motor oil threads... Everyone has an opinion, and everyone's opinion is gospel. It's almost like getting into a politics or religion discussion... I'm going to add my opinion here, but bottom line is do some research, and use some common sense and make your own decision.
Scenario 1: Your tire is 7 years old. It is a quality tire, but you don't know the history. REPLACE
Scenario 2: Your tire is less than 7 years old. It either looks like hell (weather/age cracked, worn funny) OR is is a low quality tire. REPLACE
Scenario 3: Your tire is greater than 7 years old. It looks fine. There is no adverse wear or weather checking. You know the tires history. It has not been run underinflated or abused in any way. It is a quality tire. You are probably ok.
And I'll do one better and put my money where my mouth is. I run Michelin XPS Ribs on my coach. The coach and the tires have always been stored indoors. Tires have not been abused in any way. There is no age checking at all. Wear pattern is fine. They are greater than 10 years old. As a matter of fact, in the last 4 years, I have not even had to add air to the tires. At all. (I don't travel in winter... Only drives to keep the coach limber, so the reduced pressure due to the cold is not an issue, as the coach is also lightly loaded)
I just did a trip from Texas to Florida and back with my family of 5 with the coach fully loaded. It was 104 out when I left, and similar temps most of the drive. Only thing I do is a walk around of the coach with a visual inspection and a non-contact thermometer at every gas stop while on the road. Other than those checks, I didn't worry at all about the tires.
Here is an interesting read from a Fire Safety organization on tire age and Fire Apparatus that was publised a few years ago. Reading through the study, their findings make sense to me... And in my opinion, if what is described below is good enough for an emergency vehicle, it's good enough for my coach...
https://www.nfpa.org/-/media/Files/News-and-Research/Fire-statistics-and-reports/Emergency-responders/RFAutomativeFireApparatusTireReplacement.ashx?la =en
Quote:From the present research, it is found that no literature convincingly supports a seven year tire
replacement criteria. Further, it is realized that the wear and tear of the tire are due more importance
while considering a tire replacement. As mentioned in the rubber manufacturer's association statement,
since service and storage conditions vary widely, accurately predicting the actual serviceable life of any
specific tire based on simple calendar age is not possible. A tire should be removed from service for
multiple reasons: tread wear to minimum tread depth, tire damage like cuts, cracks, bulges etc., improper
inflation pressure and storage conditions. A specific inspection and maintenance of fire apparatus tire is
recommended.
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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| Re: [GMCnet] Tire age advise [message #346970 is a reply to message #346966] |
Wed, 28 August 2019 11:53 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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If you really want an example of age-out, here is the example passed to me by a friend that is the curator of a museum.
After the Mercury and Apollo programs, NASA made changes to the space suits that made all those older suits obsolete. They awarded many to museums with complete care instructions. These suits were displayed in climate controlled cases. This was good for a while, but then it was noticed that the were in trouble. Some were literaly falling apart. This was investigated at great length and it was found that even with the best of care, the elastomers that were supposed to bond all of the different parts were failing. This was age-out only and they could not find any means to stop it from happening.
While this is now more serious with the elimination of solvent borne adhesives and their replacement with water based compounds, it apparently was known of years ago, but not much that was bonded lasted long enough to be an issue.
I had a person experience this way with laminated sails. Twenty-odd years ago, I bought a competitive sloop. I got it will 11 sails in the inventory. The majority were laminated and the loft that inspected (and repaired some) said that they were all in great condition. I wasn't ready. By the end of the first season, there was only one laminated sail still usable. There were fortunately a pretty complete suit of cruising sails in stitched Dacron.
So, this is what you are up against. UV, and exercise don't matter very much, but the years will come to get you.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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