WINTER TYRE FOR VEHICLE, PARTICULARLY A TRACTION WINTER TYREFOR HEAVY TRUCKS

The present invention relates to a winter tyre of a vehicle, the tread (1) whereof being provided with tread elements (11) and mainly circumferential (a-e) grooves separating same from each other, and grooves transverse (j-o) relative thereto, the tread element rows (A-F) between said circumferential grooves being displace d relative to each other so that the tread elements adjacent in axial directio n to the tyre are overlapping, and said tread elements being provided with capillary groov es (8a, 9a) opening to the tread and into the tyre with the purpose of increasing th e grip of the tread with the road surface. The winter tyre is characterized in that adjacent tread elements overlappingly adjacent in axial direction to the tyre are connected in pairs with each other into double tread elements (2) with a bridge part (3) connecting one end of a lateral edge (4) adjacent to one tread element and t he opposite end of a lateral edge (5) adjacent to another tread element (2b) to form a bridge zone, and the wing parts (6a, 6b) formed from the connected tread elements (2a, 2b) extend therefrom in opposite directions, that the length of the bridge part (3), viewed in axial direction to the tyre, is equivalent to the width of th e groove (c) between the connected double tread elements (2a, 2b), that the bridge zone i s provided with a long capillary groove (7) extending from one circumferential outer edge thereof to the opposite outer edge thereof, that the long capillary groove (7) is discontinued from the area (13) ambient to the anti-skid stud (12), if an an ti- skid stud with the support area is arranged in the area of the long capillary groove.