Pneumatic tire

A pneumatic tire comprising a plurality of circumferential main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned and formed by the circumferential main grooves in a tread portion, wherein,

• when the left and right circumferential main grooves disposed outermost in a tire width direction are called outermost circumferential main grooves, a region on an inner side in the tire width direction of the tread portion, demarcated by groove center lines of the left and right outermost circumferential main grooves is called a center region, each of the land portions within the center region of the land portions is called a center land portion, each of left and right regions on outer sides in the tire width direction is called a shoulder region, and each of the land portions within the shoulder regions is called a shoulder land portion,
• the center land portions and the shoulder land portions each comprise a plurality of sipes,
• not less than 90% of the sipes disposed in the center region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in the shoulder regions are constituted by three-dimensional sipes,
• the center land region and the shoulder land regions each comprise a plurality of lug grooves arranged in the tire circumferential direction,
• a pitch number N_ce of the lug grooves in the center land region and a pitch number N_sh of the lug grooves in the shoulder land regions have a relationship such that N_ce>N_sh,
• a ground contact width W_ce of the center region is defined a sum of ground contact widths of the land portions positioned between the left and right outermost circumferential main grooves and in a tire ground contact patch, a groove area ratio S_ce within the ground contact width W_ce of the center region is within a range 0.25≦S_ce≦0.35, and a total groove area ratio S_t in the tire ground contact patch is within a range 0.28≦S_t≦0.38,
• the lug grooves of the center land region include a plurality of main inclined grooves and a plurality of minor inclined grooves arranged in the tire circumferential direction,
• each of the minor inclined grooves intersects each of at least two of the main inclined grooves at an intermediate portion with one another, and both ends thereof terminate within a center land portion,
• a first end of each of the main inclined grooves is in communication with either one of the left and right circumferential main grooves, and
• a second end of each of the main inclined grooves is in communication with an intermediate portion of another one of the main inclined grooves across the tire equatorial plane.

A pneumatic tire comprising a plurality of circumferential main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned and formed by the circumferential main grooves in a tread portion, wherein,

• when the left and right circumferential main grooves disposed outermost in a tire width direction are called outermost circumferential main grooves, a region on an inner side in the tire width direction of the tread portion, demarcated by groove center lines of the left and right outermost circumferential main grooves is called a center region, each of the land portions within the center region is called a center land portion, each of left and right regions on outer sides in the tire width direction is called a shoulder region, and each of the land portions within the shoulder regions is called a shoulder land portion,
• the center land portions and the shoulder land portions each comprise a plurality of sipes,
• not less than 90% of the sipes disposed in the center region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in the shoulder regions are constituted by three-dimensional sipes,
• the center land region and the shoulder land regions each comprise a plurality of lug grooves arranged in the tire circumferential direction,
• a pitch number N_ce of the lug grooves in the center land region and a pitch number N_sh of the lug grooves in the shoulder land regions have a relationship such that N_ce>N_sh,
• the lug grooves of the center land region include a plurality of main inclined grooves and a plurality of minor inclined grooves arranged in the tire circumferential direction,
• each of the minor inclined grooves intersects each of at least two of the main inclined grooves at an intermediate area with one another, and both ends thereof terminate within a center land portion,
• a first end of each of the main inclined grooves is in communication with either one of the left and right circumferential main grooves, and
• a second end of each of the main inclined grooves is in communication with an intermediate portion of another one of the main inclined grooves across the tire equatorial plane.