" In ideal conditions, a tire may have a life expectancy that exceeds 10 years from its date of manufacture. However such conditions are rare." and the best method of testing a tire destroy the tire If your have a microscope and ultrasound you can check the area around the bead for fine cracks on the micro level first not always obvious on the macro level,inside and out.Dry rubber cracks. Cold is good, dark is good. If under close examination you find no cracks,flex the tire, the best way is to turn it inside out once or twice and check it again.no easy task for sure and it will destroy the usefullness of the tire ! Of course if you have a chemist in the family with a lab at their bequest it would be much easier to check the quality of an old tire. 10 years is the norm, 6 years is the average useful life of any tire under average conditions. Me? I would pass, it just ain't worth the chance of tread flying in any and all directions Get the picture? Just say no to cracks
