[Leamreject]

A while ago I spent a few days in Germany with a well known car manufacturer on a training course. Winter/summer tyre storage was a topic covered as it's law to run different seasonal tyres in Germany, so storage is common practice.

Apparently the two main reasons incorrectly stored tyres degrade quickly are UV and ozone. So basically don't leave them in the sun, also having them stored near a fridge or freezer with a motor constantly running causes ozone. (Garage fridge/freezers were mentioned as examples to avoid).

Ozone accelerates the degradation of all sorts of rubber on your vehicle, tyres hoses and seals etc. Several of us thought it was a myth but they say not, and it was confirmed by a tyre manufacturer at the same event.