Ride that bike every day.
Dear Matthew Alice: My bicycle's tires go flat if I don't ride my bike for a couple of months. Would they go flat just as fast if I rode my bike regularly during that period? And if so, what makes the air decide to leave during inactivity? Boredom? — Steve Terry, La Mesa
Ride that bike every day, Steve, and, barring punctures, you will never have to put air in the tires again. They’re designed to go flat when they sit to keep them from bursting if sun or heat over-expands the air in the tube. Centrifugal force generated by the rotating wheel keeps the tire from leaking while you ride. So that flat tire is just Schwinn’s way of telling you to get off your butt and get some exercise.