PNEUMATIC TYRE Russian patent published in 2016 - IPC B60C11/04 B60C11/11 B60C11/12 B60C11/13 

FIELD: machine building.

SUBSTANCE: invention relates to automotive industry and concerns an all-season tyre tread. Tyre comprises multiple main lengthwise grooves (21-23) extending in longitudinal direction of tyre, as well as multiple surfaces for contact with road surface (31-34), separated and formed by said main lengthwise grooves (21-23) in area of tread. Each of said surfaces for contact with road surface (31-34) has multiple recesses (312-342) respectively. At least 90 % of recesses (312) and (322) located in inner area are two-dimensional recesses and not less than 90 % of recesses (332) and (342) located in external area are three-dimensional recesses. Number N_in of lug grooves (311) in shoulder surface of contact with road surface (31) on side of inner area and number N_out of lug grooves (341) in shoulder surface of contact with road surface (34) on side of outer area relate so that N_in > N_out.

EFFECT: technical result is improved stability on dry, and on snow-covered road surface.

8 cl, 7 dwg