My personal policy is that I never plan to go far, fast, or long on my spare. It’s a 10 year old zero mile Nokian WRC3 of smaller diameter than my current 15’’ tires, a leftover from a previous set of five matching tires. 

Chris. 

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> Wiadomość napisana przez Richard Koerner <rjkinpb@sbcglobal.net> w dniu 3/9/21, o godz. 13:50:
> 
> I run 16" GoWesty alloys and correct tires.  But I keep a 14" Vanagon steel wheel (with 5 original nuts and 5 original bolts) with correct rated tire in the clamshell.  Brand new....well...it was 9 years ago.  And all that blowby heat from radiator; no rubber wear, but many cycles of hot and cold, expanding and then shrinking back, a tough environment.  No sunshine of course; ozone exposure same as other tires I guess.  I always keep it properly inflated.
> 
> So the question:  time to replace this unused tire?  For me, the spare is only to get to tire store to replace the 16" tire after failure.
> 
> Rich
> San Diego