27% of passenger cars and 32% of pickup trucks, SUV's and minivans have at least one significant under inflated tire.*

 

9% of tires on the road are bald.*

 

A tire can lose as much as 50% of its inflation pressure and not appear to be flat. Inflation pressure in a tire goes up (in warm weather) or down (in cold weather) 1-2 pounds for every 10 degrees of temperature change.