TIRE Russian patent published in 2014 - IPC B60C11/11 B60C11/04 

FIELD: transport.

SUBSTANCE: tread contains blocks. Block (100) includes a pair of extending sections (40) which protrude in direction of tire circumference, respectively from side surface (25A) and side surface (25B), and a pair of outwardly outstanding sections (60) which overhang outwards, respectively from this pair of extending sections (40) in direction of tire circumference. Extending section includes sharp angle (45) formed by intersecting sloping groove and ring groove. Extending section (40A) lays at the side of one edge in direction of tread width, and extending section (40B) lays at the side of the other edge in direction of tread width. Top surface relating to outwardly outstanding section (60) in radial tire direction is inclined relative to radial direction of tire.

EFFECT: better tire performance on snow.

4 cl, 7 dwg, 1 tbl