Pneumatic tire tread for ice and snow covered road surfaces

摘要

A pneumatic tire for use on iced and snowed road surfaces has a tread surface. The tread surface has a plurality of main grooves (2) extending in a circumferential direction of the tire and a plurality of lateral grooves (3) extending in a width direction of the tire. Blocks (4) are defined by the main grooves (2) and the lateral grooves (3). The blocks (4) have a ground contact face (4A) which has a plurality of pairs of sipes (6) comprising a left sipe (6A) and a right sipe (6B) extending in the tire width direction. The plurality of pairs of sipes (6) are placed in a predetermined interval in the tire circumferential direction. Each of the left (6A) and right sipes (6B) of each pair extends from a width-directional center portion (4C) of the ground contact face (4A) of the block (4) toward each way of the tire width direction so as to open its outer end to each side face (4X) of the block (4).