Greg -
My Riken tires, which were 15 years old, had no visible signs of age on the
sidewall.. there wasn't a crack to be seen! Frankly the tires still look
only 3 years old.
Didn't stop the belt from seperating internally...
Cheers,
Alan
On 7/3/07, Greg Lemon <glemon@neb.rr.com> wrote:
>
> This is from memory, but a few years back "they" came out with a
> recommendation that tires be replaced every five years or so regardless of
> mileage.
>
> What I heard or read is that that was a standard being pushed by the tire
> industry and that 10 is probably more realistic for a collector car.
>
> Rubber dries out and internal belts can separate and delaminate over time
> regardless of mileage.
>
> In my opinion take a common sense approach--if you have a car that is
> trailered to shows and gently tours you might extend tire life a bit, if
> you
> autocross or go on long highway trips you might keep the replacement
> closer
> to five years.
>
> Exposure to temperature extremes and lots of sun has an effect on tire
> life
> as well.
>
> One sign of age is the checking or cracking on the sidewalls, but they
> say
> that deterioration is not always visably apparent.
>
> Greg Lemon
> 54 BN1
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