Patent ID: 8267132

Claim:
A pneumatic tire comprising: a tread portion provided with at least two tire circumferential grooves extending along a tire circumferential direction and sectioning a rib-shaped land portion; and a plurality of inclined grooves formed in the rib-shaped land portion, consisting of two or more small grooves inclined at a same direction with respect to the tire circumferential direction and having an inclination angle within a range between 10 degrees and 60 degrees formed in a surface of the tread portion and configured in a zig-zag manner by coupling ends of the small grooves; wherein two of the inclined grooves adjacent to each other in the circumferential direction are partially overlapped in the circumferential direction, the inclined grooves include an opening part so that only one end of the inclined groove is opened to one of the tire circumferential grooves and the other end of the inclined groove terminates in the rib-shaped land portion or communicates to one of the circumferential grooves via a sipe, and the tire circumferential grooves do not communicate with each other via the inclined grooves.