SAFE LIFE OF TIRES
(NEW BERN, NC)
My understanding is that the safe life of tires is 10 years.
I have "Red Line" tires that I purchased 40 years ago. They have been mounted but in storage 30 of those years with about 3000 miles.
They look brand new. I closely examined the rubber and the mounting rims and there are no cracks.
A little tire dressing and they look brand new.
Now I am willing to buy new tires but I seriously would like to know what is the danger of driving along at 65 miles per hour on the interstate. Will they blow or what should their death be?
I do drive them around the neighborhood to show the car.
I'm sure you can appreciate that there are many things which can affect the life of a tire, some of which are somewhat controllable and others which are not.
If your tires have been stored in conditions where the rubber and component materials are not subject to anything which might cause them to deteriorate they may well last considerably longer than the manufacturer's warranty period.
Even if your tire "looks" to be in perfect condition on the outside there may be internal imperfections which you can't see. One thing you might do is dismount these tires and inspect the interior. If the inside is not showing any sign of deterioration that might be a good sign. If they are tubeless tires be careful to watch for rubber residue inside the tire (a balck rubber powder). If this is present the tires have certainly suffered damage.
I would prefer to err on the safe side and not use these vintage tires on high speed travel, keeping them for slow leisurely drives.
There are companies which do manufacture new vintage tires to be used in restored vehicles. Try doing a search on the internet for "Vintage Tires" to see if your tire is available.