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2. Tire-pressure gauge - Wikipedia

   en.wikipedia.org/wiki/Tire-pressure_gauge

   A tire-pressure gauge, or tyre-pressure gauge, is a pressure gauge used to measure the pressure of tires on a vehicle. Proper tire pressure is crucial for vehicle safety, fuel efficiency, and tire longevity. Tire gauges come in various types, including analog, digital, and dial gauges, each offering different features and accuracy levels.

3. Direct TPMS - Wikipedia

   en.wikipedia.org/wiki/Direct_TPMS

   All new model year 2008 light vehicles shall have a TPMS (direct or indirect) fitted which is capable of detecting when one or more of the vehicle's tires, up to all four tires, is 25% or more below the manufacturer's recommended inflation pressure (placard pressure) or a minimum activation pressure specified in the standard, whichever is higher.

4. Tire-pressure monitoring system - Wikipedia

   en.wikipedia.org/wiki/Tire-pressure_monitoring...

   A tire-pressure monitoring system (TPMS) monitors the air pressure inside the pneumatic tires on vehicles. [1] A TPMS reports real-time tire-pressure information to the driver, using either a gauge, a pictogram display, or a simple low-pressure warning light. TPMS can be divided into two different types – direct (dTPMS) and indirect (iTPMS).

5. Bicycle pump - Wikipedia

   en.wikipedia.org/wiki/Bicycle_pump

   The pressure rating of tires is usually stamped somewhere on the sidewall. This may be in psi (pounds per square inch) or bar. The pressure rating could be indicated as "Maximum Pressure," or "Inflate to . . . " and will usually give a range (for example, 90-120 psi, or 35-60 psi).

6. Bicycle tire - Wikipedia

   en.wikipedia.org/wiki/Bicycle_tire

   For low inflation pressures, this distinction is more important, as the ideal gas law applies to absolute pressure, including atmospheric pressure. For example, if a fat-bike tire is inflated to 0.5 bar (50 kPa; 7.3 psi) gauge pressure at room temperature 20 °C (68 °F) and then the temperature is decreased to −10 °C (14 °F) (a 9% decrease ...

7. 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 ).