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Registered
Join Date: Nov 1998
Location: antioch, ca, usa
Posts: 1,082
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"Life" of coll. spare tire while stored?
Being that the spare tire spends 99.99% of it's life uninflated, I was wondering if they have a certain "shelf" life.
While using mine not too long ago, I got nervous when I thought about the seems where it folds getting weak from age. Thanks,
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'73 914, 1.7, with Boxster transmission in the future? 
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05-09-2003, 03:10 PM
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On a great circle route
Join Date: Feb 2003
Location: recalculating...
Posts: 680
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From my 911 Owner's Manual, page 72, "The supposition that tire durability and performance are imune to the effects of storage and age are unfounded. Chemical additives, which make the rubber elastic, lose their effectiveness in the course of time and the rubber becomes brittle and cracks. Therefore, the tires, especially the collapsible spare tire, should from time to time undergo a visual check, To accomplish this, pump up the collapsible spare tire.
Under no circumstances should tires older than six years be used on your Porsche. The age of the tire can be obtained from the "DOT" code number. If for example, the last three numbers read 125, then the tire was produced in the 12th week of 1985.
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Russ |
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05-09-2003, 05:13 PM
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nice doggie
Join Date: Oct 2002
Location: Denver, CO
Posts: 1,478
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Does that mean I need to replace my 25 year old spare?
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Jerry 78 SC hotrod 02 Mini Cooper S |
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05-10-2003, 10:41 AM
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Automotive Monomaniac
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I think nearly all of us need new spares!
Do I hear group buy?
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2018 - Porsche 911 Carrera 7MT / 2018 - Porsche Macan 7DCT / 1993 - Cadillac Allante / 2023 - RAM TRX (on order) |
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05-10-2003, 11:39 AM
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Registered
Join Date: Mar 1999
Location: Cornwall-on-Hudson, New York, USA
Posts: 4,499
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I took mine out just yesterday and pumped it up, probably for the first time in its 20-year life. Tire looked fine...but the valve stem leaks at its base badly enough that unless I can somehow figure out a fix, the spare is essentially useless.
stephan
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Stephan Wilkinson '83 911SC Gold-Plated Porsche '04 replacement Boxster |
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05-10-2003, 02:49 PM
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Registered
Join Date: Sep 2000
Location: Shreveport, La.
Posts: 1,710
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My son had to use his temp spare the other day. Hit a road hazard and split a brand new T/A on the 944. It worked ok. I wouldn't recommend any more than getting to the tire shop on it though.
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Robert Stoll 83 911 SC 83 944 |
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05-10-2003, 03:43 PM
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