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This two-in-one tool takes and records tire temperatures and pressures at the same time, saving you from fumbling with two tools, a pen, and paper. It can display 12 tire temperatures at once, or 4 pressures at once, but that's not all. This gauge actually uses the temperature data to calculate and display compensated tire pressures!
What is Compensated Tire Pressure, and why is it important?
Baseline (or cold) tire pressure is the pressure you first set the tires to before a session. Hot tire pressure is the pressure you read on the gauge at the end of the session. Compensated Tire Pressure is the pressure which your hot tire would have if it were still cold. In other words, it's the pressure you should use as your baseline when the tires are cold again.
Here is an example: The car is handling just the way you like it. You want your tire pressures to be exactly the same the next session. When you pull into the pits, your crew measures the tire temperatures (140°F) and pressures (19psi). Where should you set the cold tire pressures so they will reach the same pressures during the next session? This gauge will do the math for you! It will show you the current pressure and the corresponding pressure at 80°F. Even if your tires don't cool off completely before the next session, you can still set the pressures to the correct compensated pressure.