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Daily temperature fluctuations can result in appreciable changes in tire pressure. Cold inflation pressure should therefore be measured in the morning, as this is the coldest time of day. This will ensure a tire meets or exceeds the required inflation pressure at any time of day.
Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction. The UTQG was created by the National Highway Traffic Safety Administration in 1978, a branch of the United States Department of Transportation (DOT). [ 1 ]
The drop in temperatures, especially during overnight hours, can cause the air inside the tires to condense, meaning that it takes up less space. When this happens, the tire pressure — measured ...
At temperatures below −7 °C (20 °F), snow crystals are harder and generate more friction as a tire passes over them than at warmer conditions with snow or ice on the road surface. However, as temperatures rise above −2 °C (28 °F), the presence of free water increasingly lubricates the snow or ice and diminishes tire friction.
Mountain snowflake pictograph: Winter passenger and light truck tires that meet the severe snow service requirements of Rubber Manufacturers Association (RMA) and Rubber Association of Canada (RAC). [20] N-x: Original tires for Porsche where "x" is a "0" for the first approved in that size, "1" the second, ... [20] "NHS": Not highway service
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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).
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