Patent ID: 10071598

Abstract:
A studless winter tire that has enhanced performance on ice and snow both initially and after degradation while maintaining good abrasion resistance is provided. The studless winter tire includes: a cap tread formed from a rubber composition A; and a base tread formed from a rubber composition B. The studless winter tire satisfies the following formulas (1) and (2): (1) a×c/100<b×d/100; and (2) a≥8, where a represents the softener content (% by mass) based on 100% by mass of the rubber composition A; b represents the softener content (% by mass) based on 100% by mass of the rubber composition B; c represents the percentage by mass (% by mass) of the cap tread based on the entire tread; and d represents the percentage by mass (% by mass) of the base tread based on the entire tread.