Tires should be stored upright and in a dry, cool place, away from sunlight and sources of ozone, such as electric motors. However, if you must store tires flat (one on top of the other), make sure you don't stack too many on top of each other. Too much weight can damage the bottom tire. Also be sure to allow air to circulate around all sides of the tires, including underneath, to prevent moisture damage.
If storing tires outdoors, protect them with an opaque waterproof covering and elevate them from the ground. Do not store tires on black asphalt, other heat-absorbent surfaces, snow-covered ground or sand.
| Motorists Tire Care & Safety Guide |