Let's start with a few general recommendations.
For good preservation, bicycle tyres should be stored in a dry place, away from UV rays. Temperatures are also an important criterion, because at their extremes they have a damaging effect on tyres. When it's too cold (below 0°C, for example), the tyre rubber can break. When it's too hot, the tyre's ageing process accelerates. Tyres should therefore be stored at a moderate temperature.
Avoid air-conditioned areas as some air-conditioners generate ozone, which can damage the chemical compounds in tyres.
We also recommend that you never store bike tyres in spaces where electrical equipment, solvents, hydrocarbons, fuels or chemical products are present.