When you store wheels that are not in use, it's important to keep them from direct sunlight, rain, water, heat sources or sparks. They should never be stored near solvents, petrol, oils or similar substances. Especially flammable ones.
Store wheels1 hung up or lying on their sides on the floor. If you store tyres not fitted on rims, you should never hang them up. Be sure to store them standing upright or lying on their sides. If you hang up rimless tyres they may become deformed.