Originally Posted by Antz_Marchin
No, the reason you overinflate during winter storage is for the most part because air contracts when it gets very cold, thereby decreasing the pressure in the tires. No real need to overdo things, you just want to compinsate for the decrease in air pressure when the air in the tires cools drastically.
That's not entirely true, your tires will only contract if the air around the tire is warmer than the air within the tire, thus there is more air pressure outside which presses inwards.
However, the air outside of the tire is pretty much the same temperature as the air inside the tire, thus the pressure levels have both dropped at the same rate.
I think most people over inflate just to eliminate flat spots because the tires sit on one spot for an extended period of time.