Patent ID: 8322386

Claim:
A pneumatic tire comprising a tread, the surface of the tread including at least one row of a land portion which comprises a circumferentially continuous rib portion defined by circumferential grooves extending in the circumferential direction of the tire, the circumferentially continuous rib portion having a plurality of lug grooves, one end of each lug groove opening into one of the circumferential grooves and the other end of each lug groove terminating within the land portion, and a plurality of wing portions defined by the lug grooves, wherein each of the wing portions is continuously provided with a chamfer on the side facing one of the circumferential grooves in the circumferential direction of the wing portion, the profile line of the chamfer, when viewed in a cross section perpendicular to the tire circumferential direction, being located radially inside the virtual contour of the tire crown and the depth of the chamfer increasing as approaching the circumferential groove and, a chamfer width, which is a distance of width direction along with a tire surface of the chamfer, gradually increases from the leading edge of the wing portion to the center and gradually decreases from the center to the trailing edge of the wing portion, such that the profile line of the chamfer forms a continuous arc.