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2. Pound per square inch - Wikipedia

   en.wikipedia.org/wiki/Pound_per_square_inch

   For example, a bicycle tire pumped up to 65 psig in a local atmospheric pressure at sea level (14.7 psi) will have a pressure of 79.7 psia (14.7 psi + 65 psi). [2] [3] When gauge pressure is referenced to something other than ambient atmospheric pressure, then the unit is pound per square inch differential (psid).

3. Tire-pressure gauge - Wikipedia

   en.wikipedia.org/wiki/Tire-pressure_gauge

   A tire-pressure gauge displaying bar (outside) and psi (inside) Since tires are rated for specific loads at certain pressure, it is important to keep the pressure of the tire at the optimal amount. The precision of a typical mechanical gauge as shown is ±3 psi (21 kPa ).

4. Ground pressure - Wikipedia

   en.wikipedia.org/wiki/Ground_pressure

   Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle, and is one measure of its potential mobility, [1] especially over soft ground. It also applies to the feet of a walking person or machine. Pressure is measured in the SI unit of pascals (Pa).

5. Cold inflation pressure - Wikipedia

   en.wikipedia.org/wiki/Cold_inflation_pressure

   Atmospheric pressure will decrease around 0.5 psi for every 1000 feet above sea level. As a vehicle descends from a high altitude location, the absolute pressure inside the tire remains the same, but the atmospheric pressure increases; therefore the gauge pressure will decrease.

6. Orders of magnitude (pressure) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(pressure)

   120–290 psi Pressure used in boilers of steam locomotives [citation needed] 1.1 MPa 162 psi Pressure of an average human bite [citation needed] 2.8–8.3 MPa 400–1,200 psi Pressure of carbon dioxide propellant in a paintball gun [64] 5 MPa 700 psi Water pressure of the output of a coin-operated car wash spray nozzle [58] 5 MPa 700 psi

7. Pressure - Wikipedia

   en.wikipedia.org/wiki/Pressure

   For gases, pressure is sometimes measured not as an absolute pressure, but relative to atmospheric pressure; such measurements are called gauge pressure. An example of this is the air pressure in an automobile tire, which might be said to be "220 kPa (32 psi)", but is actually 220 kPa (32 psi) above atmospheric pressure. Since atmospheric ...