Winter tire for vehicle, particularly a traction winter tire for heavy trucks

A traction winter tire for heavy trucks having a tread being provided with circumferential rows of tread pattern blocks, and mainly circumferential grooves and transverse grooves separating said pattern blocks from each other, the circumferential rows of tread pattern blocks being displaced relative to each other so that the tread pattern blocks adjacent in an axial direction of the tire are overlapping, each of said tread pattern blocks comprising both end opening sipes opening to the tread surface and extending into the tire for enhancing the grip of the tread with a road surface, wherein the overlapping and axially adjacent tread pattern blocks are connected in pairs into double tread pattern blocks by a bridge part connecting one end of a side edge of one tread pattern block and the opposed end of an adjacent side edge of the other tread pattern block with each other to form a bridge zone and wing parts, the double tread pattern blocks adjacent each other in circumferential direction being overlapping in the axial direction, wherein a shoulder area of the tire comprises, alternatingly, a tread pattern block of a double tread pattern block and an unbound single tread pattern block, the wing parts of the double tread pattern blocks being formed from the connected tread pattern blocks and extending in opposite directions from the bridge zone, the double tread pattern blocks each comprising a both end opening long sipe extending from one circumferential outer edge thereof to the opposite outer edge thereof, at least one long sipe being discontinued adjacent a support area for an anti-skid stud.