Did someone ask about the safety of driving on an old spare?
I got a right rear flat recently on my 1979 911SC in the middle of farm country in Central California. I put on the 40 year old compact spare, inflated it properly, and drove 6 miles (only 6 miles!) on the freeway at 55mph to a tire shop. The full size tire won't fit in the frunk so I put it on a towel in the passenger seat.
This is what it looked like when the tire shop took the spare off - the tread had separated.
There is no provision for a full size spare in this 911 so I bought an unused 40 year old compact replacement spare and simply hope for the best if I ever need to use it in the future.
Your mileage may vary.
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