3 peak mountain snow flake8/3/2023 The standard helps ensure drivers can easily identify tires that provide a higher level of snow traction, and tires meeting that standard are branded with the three-peak mountain snowflake (3PMSF) symbol. Tire Manufacturers Association (USTMA) and the Rubber Association of Canada (RAC) agreed on a performance based standard to identify passenger and light truck tires that attain a traction index equal to, or greater than 110 (compared to a reference tire which is rated 100) during the specified American Society for Testing and Materials traction tests on packed snow. Note: 3PMSF-branded all-season and all-terrain tires cannot match the traction of dedicated winter / snow tires in all winter weather conditions and should not be considered a replacement for where and when a dedicated winter tire is needed. Tires branded with the 3PMSF symbol are expected to provide improved snow traction beyond a standard M+S branded all-season tire.Braking and turning on snow, along with ice traction are not components of the test.
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