If you have multiple sets of tires, proper tire storage is a must. (Just setting them off in the corner of your garage isn’t enough.) Proper storage ensures that your tires’ appearance and performance are maintained. Before you store your tires, be sure to inspect each one for damage or uneven wear.
 
How to Store Your Tires

• Store your tires indoors in a clean, cool and dark location away from direct sunlight, sources of heat and ozone such as hot pipes or electric generators.
• Be sure the surfaces on which tires are stored are clean and free from grease, gasoline or other substances that could deteriorate the rubber.
• If storing outdoors raise tires off the ground and use water proof covering with holes to prevent moisture build-up
• If tires are on vehicle, store on blocks to remove load from the tires. Maintain placard inflation pressure

If your tires have whitewall or raised white lettering, store them with the whitewall or raised white lettering facing each other. Otherwise, black rubber could stain them. (The results are not pretty.)