How should I store summer tyres whilst winter tyres are fitted?

I changed my tyres to winter ones and am keeping the summer tyres in my garage. I have been told that the rubber may start cracking and they will not last as long as they're not being used. Is this correct, and if so, how should I store them?

Asked on 16 February 2013 by BM, via email

Answered by Honest John
No. Not true. It is actually UV rays that cause the cracking to the sidewalls so tyres should be stored off the ground and out of the light.
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