PNEUMATIC TIRE Russian patent published in 2012 - IPC B60C11/12 B60C11/11 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry, namely, to studless tire tread pattern. Tire tread comprises multiple clusters composed by multiple lengthwise grooves and multiple lateral grooves provided with multiple segments extending across tire tread. Every said cluster is divided into multiple cluster elements including, at least, first cluster element and, at least, second cluster element arranged side by side. Width of said first cluster element decreases in tread lengthwise direction from end sections to cluster center, across the tread. Width of said second cluster element increases gradually in tread lengthwise direction from end sections to cluster center, across the tread. Width of said first cluster element decreases in tread lengthwise direction gradually decreases toward tread surface. Width of said second cluster element increases gradually in tread lengthwise direction gradually decreases toward tread surface.

EFFECT: improved performances on ice.

5 cl, 9 dwg