http://two-wheels.michelin.com/2w/f...codePage=8092004155045_06102004183141&lang=EN
Store tyres in an area that is ventilated, dry and warm, away from direct sunlight and moisture.
Store tyres away from any chemicals, solvents or hydrocarbons, which can alter the composition of the rubber.
Store tyres away from sharp objects that could cut or puncture the rubber (metal, wood, glass etc.)
Do not store tyres in stacks for long periods unless the tyres are mounted and inflated.
Do not stack heavy objects on the tyres.
Do not store tyres near any flame or ignition source, or any device capable of producing sparks or an electrical discharge (i.e. battery chargers).