Abstract: A device for removing excess air pressure from a valve stem of a tire of a vehicle having a body with a cavity, an intake port for forming a fluid-tight seal with, extracting compressed air through the valve stem, located near the input end of the body, and conveying the air to the cavity; a control mechanism for selecting a desired magnitude of air pressure; a pressure-measuring mechanism for determining the magnitude of air pressure in the cavity; a display mechanism for displaying the selected magnitude of air pressure; and a release mechanism with a release valve and an exhaust port.