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07-17-2008, 10:15 AM
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#1
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Rivet Master
1987 32' Excella
Nepean
, Ontario
Join Date: Mar 2006
Posts: 1,414
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Tires - know when to replace them!!!
We just got back from Bozeman, a round trip of almost 5,000 miles. On our way there, about 30 miles east of Miles City MT, driving at 60 mph, I had a blowout of the inside left rear tire. I know that the pressures were OK as I check them cold each day before we drive. I know that there was plenty of tread on all my tires - the '94 LY has only 85,000 miles on it.
What I did not know is that tires rot from the inside. The safe life of a tire is 5 years from the date of manufacture. The fact that they can sit unused in a warehouse doesn't make any difference - the life is still 5 years from the date of manufacture.
The tire that blew was a Michelin X manufactured in 2000 - so it was 8 years old. Then I got a real shock - there were tires on my rig that obviously were the original ones - the chassis was manufactured in 1993 by Spartan, and the tires were re-grooveable Sumitomos dated 1991 !!!!
I purchased 7 new 8R19.5 Bridgestone tires - they were manufactured in 2007.
So how can you tell? Simple! there is a D.O.T line on the tire and it ends with 4 digits. The first two are the week within the year of manufacture (from 01 to 52) and the last two are the last digits of the year (now 08).
At the same time, I invested in the PressurePro monitoring system. This has the added advantage of allowing me to check the pressures without having to fire up my compressor and it also monitors the pressure on an on-going basis and will sound an alarm if it drops or increases outside the parameters it is set for.
__________________
VE3JDZ
AIR 12148
1987 Excella 32-foot
1999 Dodge Ram 2500HD Diesel
WBCCI 8080
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07-17-2008, 10:54 AM
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#2
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Rivet Master
1965 17' Caravel
1983 27' Excella
Walnut Grove/Laguna Woods
, California
Join Date: Jun 2004
Posts: 1,635
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Funny you should post this today.
I got an e-mail from a friend two days ago with a link to an ABC story about this very thing.
ABC News
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07-17-2008, 12:16 PM
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#3
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Rivet Master
Vintage Kin Owner
Vintage Kin Owner
Vintage Kin Owner
Currently Looking...
Greeeneville
, Tennessee
Join Date: Feb 2005
Posts: 1,301
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Tires also can be older. I found tires on my B Van with 3 numbers. Meaning they are from 1999. 349 indicates the 34th week of 1999 for manufacture.
__________________
Kevin with Baity the Lab/Pointer //------AIR # 7303------\\ WBCCI 17109 visit my restoration blog at:
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07-17-2008, 12:27 PM
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#4
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Moderator Emeritus
1972 31' Sovereign
High Springs
, Florida
Join Date: May 2002
Posts: 2,311
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Are you sure that wasn't the 3rd week of 1949?
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
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07-17-2008, 02:14 PM
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#5
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Rivet Master
2004 22' International CCD
Spotsylvania
, Virginia
Join Date: Mar 2004
Posts: 663
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I'm getting new Goodyear Marathons put on my Airstream right now. I'm glad to know the "Code" now, so I'll check them when I get the trailer back. The tire dealer told me they were new tires and that Goodyear redesigned their Marathons last year to improve reliability. We'll see!
__________________
Bob
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"THE BAUXITE BUNGALOW"
2004 22' CCD
1997 F-150
TAC VA-12
AIR# 4749
ex WBCCI# 1430
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07-17-2008, 02:28 PM
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#6
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Rivet Master
1999 27' Safari
Kent
, Ohio
Join Date: May 2006
Posts: 806
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I know that when you get air put in your tires you should always make sure you put or they put it in from a source with an air drier on it because I found I was getting oxidation on the bead of the rim and they would seep in weather or climate change. This is more common on alluminum rims but steel will rust, maybe this info is connected to rotting from inside out???? I wonder anyways
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07-17-2008, 03:12 PM
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#7
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Rivet Master
1967 26' Overlander
Huntsville
, Alabama
Join Date: Dec 2003
Posts: 3,018
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The tires are new to him
Quote:
Originally Posted by rseagle
... The tire dealer told me they were new tires and ...
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I think the local tire stores are getting caught in the middle on this issue. They sell whatever the supplier sends the shop. I have yet to see a tire shop big enough on-site to store tires for years on end.
Should you find ancient tires awaiting you at the tire shop, you should have a pre-rehearsed, calm statement as to why the tires are unacceptable.
I feel very fortunate that my Airstream's tires were only a year old when I bought them. Since they were special-ordered that time, I expect to have special-order them next time.
Next time I will caveat my special order that the delivered tires have to be no more than a year or so old.
Tom
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07-18-2008, 03:50 PM
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#8
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Rivet Master
2004 22' International CCD
Spotsylvania
, Virginia
Join Date: Mar 2004
Posts: 663
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I checked my tires today. They were manufactured 3707 (Sept. 2007). I can live with that!
__________________
Bob
---------------
"THE BAUXITE BUNGALOW"
2004 22' CCD
1997 F-150
TAC VA-12
AIR# 4749
ex WBCCI# 1430
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07-18-2008, 04:24 PM
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#9
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Rivet Master
1977 27' Overlander
Trotwood
, Ohio
Join Date: Jul 2007
Posts: 2,153
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Whow a blow out at 85K miles Id say that was great mileage. Especially if it has set any. UV rays take their toll on rubber also. Given the age Id say "YA DID GOOD"
I've had a few blow-outs myself being in the truckin industry for 45 yrs. I have seen new tires blow. U never know.
Roger
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07-18-2008, 08:13 PM
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#10
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Rivet Master
1993 34' Limited
Melbourne Florida
, Springfield Ohio
Join Date: Nov 2006
Posts: 759
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Will the age of the tire be the same if the Airstream is sitting in a permanent site? I was told to rotate the tire 1/4 once a year. Does this make sense?
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07-18-2008, 09:41 PM
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#11
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Rivet Master
Vintage Kin Owner
Vintage Kin Owner
Vintage Kin Owner
Currently Looking...
Greeeneville
, Tennessee
Join Date: Feb 2005
Posts: 1,301
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The tire can age even in the spare rack, or at the tire store. They sit on the shelf, and their limited shelf life begins.
__________________
Kevin with Baity the Lab/Pointer //------AIR # 7303------\\ WBCCI 17109 visit my restoration blog at:
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07-18-2008, 11:37 PM
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#12
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Rivet Master
Currently Looking...
1982 24' Airstream 240
Ventura
, California
Join Date: May 2006
Posts: 1,645
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Unused Marathon exploded
I saw a Marathon tire last week that had never been used that separated and looked like it exploded. It was on the back of a vintage Airstream. It had been used as the spare and never on the road. The tread looked perfect.
__________________
Paula & Ed
WBCCI # 8252 Air#13593
1982 24'Motorhome (82Ste P)
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07-26-2008, 08:27 PM
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#13
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Rivet Master
1987 32' Excella
Nepean
, Ontario
Join Date: Mar 2006
Posts: 1,414
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Quote:
Originally Posted by Mikethefixit
Whow a blow out at 85K miles Id say that was great mileage. Especially if it has set any. UV rays take their toll on rubber also. Given the age Id say "YA DID GOOD"
Roger
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The tire that blew did not have 75K miles on it - the rig is a '94 with 85K miles, but the tire that blew was manufactured in 2000. My guesstimate is that the tire had about 25K miles. It was an inside rear tire, so there was no UV issues.
It is typical that chassis manufacturers will stock up on tires that they get at a good price and use that stock for a couple of years. What that means is that the tire you get with your new vehicle can already be 3 years old - which means that you have 2 years left (wear is not an issue) and they have to be replaced.
From what I see, when you go to get tires from a tire shop, they are already almost 1 year old from their manufacture. Thus you only get 4 more years before they have to be replaced.
The Bridgestones I put on are regroovable, but I know that I'll never wear the tread down that far that this would have to be done in the next four years.
__________________
VE3JDZ
AIR 12148
1987 Excella 32-foot
1999 Dodge Ram 2500HD Diesel
WBCCI 8080
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07-26-2008, 09:38 PM
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#14
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Rivet Master
1951 21' Flying Cloud
1960 24' Tradewind
West Coast
, BC
Join Date: Feb 2005
Posts: 3,790
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We started checking tires a few years ago when a warranty issue came up and it turned out the tire was out of the manufacturers warranty period even though it was only 7 months from date of purchase. A friend found the DOT info on the net and from that point on we've been religious about checking them.
I'm sure not to anyones surprise as soon as the dealer knows you know about DOT date coding they make sure what goes on your vehicle is current. It sure did put a crimp into my buying neat old vintage tires for the hotrods at swap meets though - they were always SUCH a deal too. So much for being cheap . Now if they hit six years I pull them regardless of mileage which in the case of the Chevelle is REALLY GOING TO HURT - 4 brand spanking new radial TA's, almost period correct, the only mileage on them is rolling around the shop as we assemble it, and they are 1997 when the restoration started. Of COURSE there is someone in the background very willing to say I told you so - wait till the car is ready to go before you spend the bucks on the tires. Oh well......
Barry
__________________
Barry & Donna
Life is short - so is the door on a '51 Flying Cloud (ouch)
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07-30-2008, 10:32 AM
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#15
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Rivet Master
1987 32' Excella
Nepean
, Ontario
Join Date: Mar 2006
Posts: 1,414
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Especially important to check when buying a used RV
The issue of trailer tire age is of utmost importance when looking at a used trailer or motorhome. Last week I went along with a friend to look at a used 1976 AS Land Yacht (23 ft). The interior was pristine, carpets were spotless and like new. However, the exterior was another story.
The AS dealer he contacted told him that if that unit was on his lot he would get $10K for it. What he didn't tell the seller was:
- it needs new clearcoating (total cost ranging from $7K upwards - P&S will want a minimum of $12K)
- need 4 new tires - the ones on there had tire dressing put on so they looked good, but the date code was very old - code was 509 - 3 digits means that it was before 1990!!!!!
- needs new awning canvas
- has no air conditioner and no Fantastic Fan - but has the original 3 vents.
By my calculation, the trailer has a max value of $2,000. However, the old guy selling it who has had it for 30 years can't come to grips with that part of reality.
Incidentally, taking it all into consideration, I told my buddy to max at $5K.
__________________
VE3JDZ
AIR 12148
1987 Excella 32-foot
1999 Dodge Ram 2500HD Diesel
WBCCI 8080
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05-02-2009, 05:57 PM
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#16
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Rivet Master
2005 30' Land Yacht 30 SL
Oakland County
, Michigan
Join Date: Jul 2007
Posts: 506
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Excellent info. Thanks for the post!
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05-02-2009, 06:01 PM
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#17
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Rivet Master
2005 30' Land Yacht 30 SL
Oakland County
, Michigan
Join Date: Jul 2007
Posts: 506
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Excellent info! Thanks for the post.
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