Abstract: A pneumatic tire comprises a tread provided with at least two circumferential main grooves and a rib defined in a tread central portion by the circumferential main grooves, wherein an auxiliary groove is formed in the tread central portion, the auxiliary groove having a circumferential groove portion extending in a tire equator direction and an axial groove portion extending from an end of the circumferential groove portion in such a manner that the axial groove portion is bent at an acute angle to the circumferential groove portion, and at least an end of the auxiliary groove is open into the circumferential main groove.

Abstract: A pneumatic tire comprises a tread provided with at least two circumferential main grooves and a rib defined in a tread central portion by the circumferential main grooves, wherein an auxiliary groove is formed in the tread central portion, the auxiliary groove having a circumferential groove portion extending in a tire equator direction and an axial groove portion extending from an end of the circumferential groove portion in such a manner that the axial groove portion is bent at an acute angle to the circumferential groove portion, and at least an end of the auxiliary groove is open into the circumferential main groove.

Abstract: The present invention provides a tire 10 having a decoration region 2 provided on at least one of a pair of sidewall surfaces 1, the decoration region 2 including a pattern portion 3 constituted of patterns and a mark portion 4 constituted of marks, the tire being characterized in that degree of freedom in arranging marks is remarkably enhanced and visibilities of the marks, as compared with those of the patterns, are significantly improved. The patterns of the pattern portion 3 are formed by a first ridge group 15A including ridges 5A extending in parallel to each other and a second ridge group 15B including ridges 5B extending in parallel to each other along a direction different from the direction of the ridges 5A.