"A three-peak mountain snowflake symbol branded on the tire's sidewall indicates the tire meets required performance criteria in snow testing to be considered severe snow service rated." Starting December 15, 2014, the Highway Safety Code regulation specifies only tires bearing the three-peak mountain snowflake symbol will be considered acceptable winter/snow tires in Quebec. The prohibition also applies to any person renting out passenger vehicles not equipped with that type of tires." Note: A Highway Safety Code regulation passed Septemfor Quebec, Canada, stipulates that: "Between 15 December to 15 March, the owner of a taxi or passenger vehicle registered in Quebec may not put the vehicle into operation unless it is equipped with tires specifically designed for winter driving, in compliance with the standards prescribed by government regulation. ![]() 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. Testing measures a tire's acceleration traction on medium-packed snow only.Originally used as a designation for winter tires, the 3PMSF symbol is now featured on some all-season and all-terrain tires with snow performance that meets the testing criteria. ![]() Winter / Snow Tire Tech: What is the Three-Peak Mountain Snowflake Symbol?Ī three-peak mountain snowflake (3PMSF) symbol branded on a tire's sidewall indicates the tire meets required performance criteria in snow testing to be considered severe snow service-rated.
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