A phone survey of 1,000 U.S. drivers, sponsored by the Rubber Manufacturers Association (RMA), shows that only 17 percent of vehicles have four properly inflated tires and only 15 percent of drivers know how to properly check tire pressure. Additionally …
• 62 percent of drivers don’t know where to find the correct inflation pressure for their vehicle’s tires;
• 43 percent don’t know that tires should be checked before driving, rather than after driving; and
• 60 percent wash their cars once a month, but only 15 percent properly check tire pressure once a month.
Another RMA-sponsored survey of more than 6,000 vehicles found that 55 percent of vehicles had at least one under-inflated tire and 15 percent had at least one tire under-inflated by 8 psi.