Abstract: A pneumatic tire is provided in the tread portion with a central land portion between two crown main grooves. The central land portion is provided with notches each having a depth of 55% to 65% of the depth of the crown main groove and having a closed end and an open end opening to the crown main groove. The maximum axial length of the central notch is 10% to 15% of the maximum axial length of the central land portion, and the circumferential length of the opening is 10% to 15% of one circumferential pitch of the shoulder block row 7R. The circumferential length of the opening is 15% to 25% of one circumferential pitch of the central notches.

Abstract: A pneumatic tire is provided in the tread portion with a central land portion between two crown main grooves. The central land portion is provided with notches each having a depth of 55% to 65% of the depth of the crown main groove and having a closed end and an open end opening to the crown main groove. The maximum axial length of the central notch is 10% to 15% of the maximum axial length of the central land portion, and the circumferential length of the opening is 10% to 15% of one circumferential pitch of the shoulder block row 7R. The circumferential length of the opening is 15% to 25% of one circumferential pitch of the central notches.

Abstract: A pneumatic tire comprises a tread portion provided on each side of the tire equator with a land zone defined between two circumferential main grooves, wherein the land zone is provided with axial grooves extending between the main grooves and inclining to a first circumferential direction at an angle of from 30 to 50 degrees with respect to the tire axial direction, and auxiliary grooves inclining to a second circumferential direction opposite to the first circumferential direction. The axial groove is shallow in its axially-inner-main-groove side in comparison with its axially-outer-main-groove side. The auxiliary groove is deep in its axially-inner-main-groove side in comparison with its axially-outer-main-groove side.

Abstract: A pneumatic tire comprises a tread portion provided on each side of the tire equator with a land zone defined between two circumferential main grooves, wherein the land zone is provided with axial grooves extending between the main grooves and inclining to a first circumferential direction at an angle of from 30 to 50 degrees with respect to the tire axial direction, and auxiliary grooves inclining to a second circumferential direction opposite to the first circumferential direction. The axial groove is shallow in its axially-inner-main-groove side in comparison with its axially-outer-main-groove side. The auxiliary groove is deep in its axially-inner-main-groove side in comparison with its axially-outer-main-groove side.