The present invention provides a studless winter tire that has enhanced performance on ice and snow both initially and after degradation while maintaining good abrasion resistance. The studless winter tire includes: a cap tread formed from a rubber composition A; and a base tread formed from a rubber composition B, wherein the studless winter tire satisfies the following formulas (1) and (2): a × c / 100 < b × d / 100 ; and a ‰¥ 8 wherein 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.
Studless winter tire
Spikeloser Winterreifen
Pneu d'hiver sans clou
2015-08-05
Patent
Electronic Resource
English
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |