When parking for long periods on smooth surfaces, or when parking overnight on rough surfaces, and even overnight in cold weather, the only effective way to preserve and protect the tire from flat spots, is ALTairEGO. (Made in Italy).

An out-of-round tire causes vibration, which you may have noticed the last time your car was parked overnight in cold weather or overnight parked on rough surfaces or after a long period  park ; if you're lucky, it went away once the tires warmed up after a few miles of driving.

While short-term flat spots can indeed work themselves out, tires can develop a memory and will not return to shape. Are you scared yet? A little fear is healthy, unless you do not mind spending on a new set of tires after your car sits for a few months over the winter. Assuming you do mind, ALTairEGO is how to protect and safely store rubber.