And as much or more than even the tire, all the other peripheral
conditions that are too numerous and variable to control to be able to
My general feeling is that for local, low- to mid-speed driving, as
long as the tire has been maintained at proper inflation, etc., and
shows no visible signs of _extreme_ UV damage, etc., they're "safe
enough". I would be somewhat nervous about taking that same tire and
start cross-country on an interstate trip, especially in hot weather.
Might be fine, but I'd far prefer to be safe than sorry. Before I
started in a case like that, I'd put a new set on. Otherwise, I'd run
them until something happened...
Obviously, ymmv... :)
Covered you could keep them completely out of sunlight. Don't really
have any feel other than "quite a long time" -- guess how comfortable
I'd be driving on them would depend on what kind of tire and on what
kind of vehicle and driving they were used eventually.
I hadn't heard the Bonneville story -- I'd worry in that use! :)
Like Joseph, I also have a "meant to" to add... :)
I think temperature control, especially excessive heat, is important,
too....if the garage isn't climate-controlled and gets quite hot
during the summer months, I'd expect that to shorten expected lifetime
significantly as well.
I don't know what the maximum is, but I've used tires that were over five
years old, driven on tires that were well over 10 years old. and have seen
cars with tires that were 15+ years old. You may get more detailed
information on an automotive newsgroup, especially if one is devoted to
classics or antiques.
also on another page
A number of RV owners have established their own removal policy, averaging
If it is any help, Bridgestone's warranty expires (6) years after the date
I have numerous tires on farm equipment that are easily 15-20 years
old and quite servicable, for the use. Don't think I'd put one back
on the pickup and take off across country with one, however! :)
The old (1958) grain truck which is only used for very local light
hauling any more has tires that are easily 20 years old on it, best as
I could guess based on the manufacturer info (they bear an old Co-op
logo from at least two reorginizations prior to final dissolution of
the Farmland and I can vaguely recall when those logo shifts occurred
as I can remember some of those changes and what was going on at the
time. I have no qualms driving it at country road speeds and w/
moderate loads but again I'd not put 600 bu of grain on it and start
off on a long distance haul, either!
I'm thinking it depends a whole lot on the circumstances but in
general I'd think 10 years would be pretty safe in reasonable storage
at maufacturer/wholesale/retail levels, I wouldn't lose sleep over it. Even
for somewhat common sizes, in recent years I have been told a couple of
times that I will have to come back Thursday, when the truck comes in. Like
any other retail chain for consumers, they only stock what history shows
they can sell quickly.
Of course, if you are talking real oddball stuff, like licensed 3rd-party
repro Polyglas GT redline Bias Plies for your '69 'cuda show car, where they
only dig out the molds and run a batch every five years, yeah, there might
be cause for concern. 'NOS' is not a good thing for shelf-life parts.
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