Pneumatic tire with tread having zigzag sipes and narrow grooves

A pneumatic tire which includes, in a tread, a plurality of land sections formed by partitioning the entire tread by separator grooves, and in which all of the land sections of the tread are each provided with a plurality of sipes and also with a plurality of narrow grooves overlapping and superimposed on the sipes in a ground contact surface of the land section, the sipes having a zigzag shape including multiple peaks and valleys, the narrow grooves having a shape different from the zigzag shape of the sipes,

• each of the narrow grooves having a depth of 0.05 mm to 1.0 mm, a width of 0.1 mm to 0.8 mm, and having a pitch of 0.5 mm to 2.0 mm, wherein
• all of the narrow grooves in each land section are provided such that an angle of tilt of the narrow grooves relative to a tire's circumferential direction is set larger in end regions, located at both sides of a center region in a tire's lateral direction in each of the land sections, than in the center region, and
• for each said land section the angle of tilt of the narrow grooves is constant in the center region thereof and the angle of tilt of the narrow grooves in each of the end regions thereof is also constant, and in each region of each said land section the narrow grooves extend at the constant angle of tilt continuously from one edge of the region to another edge of the region.