Too little time with too many tires to keep spinning? FlatStoppers® are saving thousands of tires world-wide while they are "stuck" in storage. Whenever you're parking your car for 30 days or more, this best-selling product will preserve your tire shape. Once tires are set in FlatStoppers on a level surface, they settle into the pad's concave depression, which evenly disperses the weight of the car across the increased contact patch and prevents flat spots. Additionally, FlatStoppers will not conduct heat or cold into your tires despite changing floor temperatures.