[jwight]

Couple of recent threads mention these tires as being "all season" tires. While some tires with the 3 peak mountain snowflake (3PMSF) logo may be all season, others
are dedicated winter tires designed to be used only at temps below 45 degrees F. Don't confuse the two.

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.

- from Tire rack website.

https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=125&

https://www.discounttire.com/learn/tires-below-45

 

[ColoradoKiwi]

In Colorado, during the winter, I used the winter tires, and can easily say they make a difference! With winter tires I can (within reason) drive in all winter conditions with confidence. The difference in traction is amazing!