The folks at RightPSI have built a new valve-stem cap made in the U.S.A. and matched to desired tire pressure to give a visual indication when pressure is low or high. At 20 percent low, the otherwise ...

Sometimes, little things can make a big difference. Tire pressure can have a significant effect on fuel economy, but checking it generally requires unscrewing a valve cap and checking it with a ...

Nelson Ireson April 17, 2008 Comment Now! New valve-caps, called P-eyes, which monitor the air pressure of the tire they're attached to have hit the market. Pitched as a handy tool for commercial ...