Discussion
Don't chimney stack them if they are loose. This will pressure and distort the sidewalls over time.
Stand them up (as if they were fitted to the car) on thick cardboard or a piece of scrap carpet and rotate them every month or so. Providing they've been used regularly up the the point of storing and are not exposed direct sunlight, strong electromagnetic fields or chemicals/oils etc when they are stored, you'll be fine.
Stand them up (as if they were fitted to the car) on thick cardboard or a piece of scrap carpet and rotate them every month or so. Providing they've been used regularly up the the point of storing and are not exposed direct sunlight, strong electromagnetic fields or chemicals/oils etc when they are stored, you'll be fine.
A couple of years ago we had a puncture on the gun dolly of a hired irrigator. The tyres were shot to pieces (running at 25 meters an hour must hammer them 
) so the fitter had a rummage in the stores and pulled out 2 brand new tyres that he bought back in the day to go on ....... a Ford Anglia. They'd been in there decades and were as good as new.
) so the fitter had a rummage in the stores and pulled out 2 brand new tyres that he bought back in the day to go on ....... a Ford Anglia. They'd been in there decades and were as good as new. 
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