In a tire, at least one of middle land portions includes a plurality of through narrow grooves extending through the middle land portion in a tire width direction, a plurality of middle blocks each defined and formed by the through narrow grooves, and a non-through lug grooves each opening at one end to an edge portion on a tire equatorial plane side of the middle block and terminating at an other end in a central portion of the middle block. Further, a center groove has a wave-like shape with an amplitude in the tire width direction. Furthermore, an edge portion on the center groove side of the middle block has an arc shape that projects in a width direction of the middle block.

A tire includes a plurality of circumferential grooves extending in a tire circumferential direction, and a plurality of land portions defined by the circumferential grooves. Further, at least one of the circumferential grooves includes tie bars formed in a groove bottom of the circumferential groove and connecting the land portions adjacent to each other across the circumferential groove. Furthermore, each of the tie bars includes a slit that extends through the tie bar in the tire circumferential direction and that is closed when the tire comes into contact with the ground. In addition, the slit includes an inclined portion inclined with respect to the tire circumferential direction in a tread plan view.

A pneumatic tire includes a plurality of main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned by the plurality of main grooves; the plurality of land portions include at least one shoulder land portion arranged in outwardmost fashion in a tire width direction; the at least one shoulder land portion comprises a plurality of width grooves of groove width not less than 2 mm; and at least one of the plurality of width grooves extends as far as an outside end in the tire width direction of the at least one shoulder land portion and comprises, at a location toward the exterior in the tire width direction from a contact patch end, a wide portion at which groove width increases toward a groove bottom.

A tyre includes a tread portion including an outboard middle land portion disposed between an outboard tread edge and a tyre equator. The outboard middle land portion includes first and second longitudinal edges, outboard middle lateral grooves extending from the first longitudinal edge and having terminal ends within the outboard middle land portion, first outboard middle sipes extending from the respective terminal ends of the outboard middle lateral grooves to the second longitudinal edge, and second outboard middle sipes extending from the first longitudinal edge toward the second longitudinal edge beyond the terminal ends of the outboard middle lateral grooves and terminating within the outboard middle land portion. The outboard middle land portion is not provided with any lateral grooves that extend from the second longitudinal edge toward the first longitudinal edge to reach an axial center location of the outboard middle land portion.

A tire has, on a tread surface of the tire, five land portions, an installation direction of the tire to a vehicle is designated, intermediate land portions respectively have a communicating sipe 40, the communicating sipe is constituted by a first sipe 41 at a vehicle-installed outside and a second sipe 42 at a vehicle-installed inside, the first sipe and the second sipe have an intersection point P on the vehicle-installed outside of a center line in a tire width direction of the corresponding intermediate land portion, the distance between the intersection point and a land portion edge at the vehicle-installed inside is the largest in an innermost intermediate land portion of the intermediate land portions, and an angle θ1 of the first sipe to a tire circumferential direction is larger than an angle θ2 of the second sipe to the tire circumferential direction.

A tire having a tread portion. The tread portion includes a first shoulder land portion that is defined between a first shoulder main groove and a first tread end. The first shoulder land portion includes: a shoulder lateral groove that extends from the first tread end and ends in the first shoulder land portion; a first sipe that extends from an end of the shoulder lateral groove to the first shoulder main groove; and a second sipe that extends from the first tread end toward the first shoulder main groove, and ends in the first shoulder land portion. A length of the shoulder lateral groove in a tire axial direction is 0.10 to 0.30 times a width of the first shoulder land portion in the tire axial direction.

The tire includes a tread portion having circumferential grooves extending in a tire circumferential direction and land regions demarcated by the circumferential grooves. The circumferential grooves include a first circumferential groove and a second circumferential groove adjacent to the first circumferential groove and having a width larger than the first circumferential groove. The land regions include a first land region demarcated between the first circumferential groove and the second circumferential groove. The first land region has lateral grooves extending in a tire axial direction and lateral sipes extending in the tire axial direction and each having a width smaller than that of each of the lateral grooves. A total value of the widths of the lateral grooves and the lateral sipes connected to the second circumferential grooves is smaller than a total value of the widths of the lateral grooves and the lateral sipes connected to the first circumferential grooves.

A pneumatic tire comprises circumferential main grooves extending in the tire circumferential direction and land portions defined by the circumferential main grooves. The land portions are each provided with a plurality of groove units which are sets including a first groove, a second groove, and a third groove. The first groove, the second groove, the third groove are disposed without meeting one another, and radially extend at intervals from each other ranging from 90 degrees to 150 degrees. Additionally, the first groove is a lug groove with the groove width ranging from 1.5 mm to 4.0 mm and has a semi-closed structure, opening to the circumferential main groove or the tire ground contact edge at a first end portion and terminating within the land portion at a second end portion.

A tire 2 includes a tread 4 on which at least three circumferential grooves 24 continuously extending in a circumferential direction are formed, and a belt 14 located radially inward of the tread 4. A ratio of a center stretch, at a center portion of the belt, indicated by the follow/Mg formula (2) to a shoulder stretch, at an end portion of the belt, indicated by the following formula (1) is not less than 1 and not greater than 3, and the shoulder stretch is not less than 1%.

(Shoulder stretch)

100×(Rsa−Rsb)/Rsb  (1)

(Center stretch)

100×(Rca−Rcb)/Rcb  (2)

In a pneumatic tire, a land portion includes a chamfered portion formed on an edge portion of the land portion on a ground contact edge side, and a lug groove and a narrow groove disposed correspondingly to the chamfered portion. The chamfered portion is formed on the edge portion on a ground contact edge side, and has a chamfered width that increases toward a circumferential direction in the road contact surface of the land portion. The lug groove terminates in the land portion on one end, and is opened to a central portion of the chamfered portion in a longitudinal direction on the other end. The narrow groove is opened to an edge portion of the land portion on an equatorial plane side on one end, and terminates in the vicinity of a maximum width position of the chamfered portion on the other end.