Test equipment is necessary for your car to gain the edge in racing. Intercomp Racing humidity/temperature meters measure relative humidity (%RH) and temperature in both Fahrenheit and Centigrade within your tires.
The temperature inside the tire and condition of the air can affect how much pressure gain your tires will see. Don't rely on guesswork; use the right equipment—Intercomp humidity/temperature meters. Valve stem adapter is included.