Abstract: A tire includes a tread portion provided with a plurality of blocks. At least one of the plurality of blocks is provided with a sipe. The sipe extends in a sipe longitudinal direction to form a zigzag opening configuration on a ground contact surface of the at least one of the plurality of blocks. The sipe extends inwardly in a tire radial direction such that the zigzag opening configuration oscillates in the sipe longitudinal direction repeatedly with a total amplitude and a wavelength while maintaining the zigzag opening configuration. A half of the wavelength of the sipe is in a range of from 0.10 to 0.24 times a maximum depth of the sipe, and a slope of the half of the wavelength with respect to the total amplitude has an angle in a range of from 45 to 65 degrees.
Abstract: A pneumatic tire includes a tread portion including a plurality of tread blocks including at least one constricted block with a first recess disposed on axially one side of the block and a second recess disposed on axially other side of the block so as to form a narrow portion between the first recess and the second recess. Each of the first recess and the second recess includes a V-shaped top edge on a ground contacting surface of the block. Each of the V-shaped top edges protrudes toward a center of the block in a planar view of the block.
Abstract: A pneumatic tire is provided in the tread portion with zigzag crown circumferential grooves 3 having pitch length Pc, zigzag shoulder circumferential grooves 4 having pitch length Ps, crown lateral grooves 5 inclined at an angle ?c, and shoulder lateral grooves 6 inclined at an angle ?s wherein Ps>Pc and ?s<?c. Both ends of the respective crown lateral grooves 5 are connected to the zigzag groove segments 3a or 3b of the crown circumferential grooves 3 which groove segments 3a or 3b are inclined with respect to the tire axial direction to the opposite direction to the inclining direction of the crown lateral grooves 5. The number NS of the shoulder lateral grooves 6 is more than the number Nc of the crown lateral grooves 5.