A tire includes a tread portion including a first cap rubber layer forming a ground contact surface and having a loss tangent tan δ1, and a second cap rubber layer disposed inwardly in a tire radial direction of the first cap rubber layer and having a loss tangent tan δ2, the loss tangent tan δ2 being greater than the loss tangent tan δ1. The tread portion is provided with a plurality of sipes opening to the ground contact surface, The plurality of sipes, at least partially, extends inwardly in a tire radial direction from the ground contact surface to a. location beyond a boundary between the first cap rubber layer and the second cap rubber layer, and a maximum length L2 of the plurality of sipes in the second cap rubber layer is smaller than a length L1 of the plurality of sipes at the ground contact surface.

A tire, for which a mounting direction on a vehicle is specified, has a tread portion comprising an outboard shoulder land region provided with outboard shoulder lateral grooves, and an inboard shoulder land region provided with inboard shoulder lateral grooves. The outboard shoulder lateral grooves are bent convexly toward one side in the tire circumferential direction, whereas the inboard shoulder lateral grooves are bent convexly toward the other side in the tire circumferential direction. The bent angle of the outboard shoulder lateral groove is larger than the bent angle of the inboard shoulder lateral groove.

A tread portion 2 can include an inner tread end, an outer tread end, circumferential grooves, and land portions. The circumferential grooves can include an inner shoulder circumferential groove and an outer shoulder circumferential groove. The land portions can include an inner shoulder land portion and an outer shoulder land portion. The inner shoulder land portion can include inner shoulder lateral grooves and inner shoulder sipes. The outer shoulder land portion can include outer shoulder lateral grooves and outer shoulder sipes. Each outer shoulder sipe can have a chamfered portion at each of sipe edges on both sides. The chamfered portion can have a chamfered width that increases from a terminating end side toward the outer shoulder circumferential groove.

A tire having a tread portion, wherein the tread portion can include a pair of shoulder circumferential grooves, a pair of crown circumferential grooves, and a pair of middle land portions. Each middle land portion can include a plurality of middle sipes. Each middle sipe can have a chamfered portion at at least one of sipe edges on both opposite ends thereof. The chamfered portion can extend from the crown circumferential groove to the shoulder circumferential groove. A first chamfered width of the chamfered portion at a first one of the opposite ends on a crown circumferential groove side can be greater than a second chamfered width of the chamfered portion at a second one of the opposite ends on a shoulder circumferential groove side.

A tire that includes a tread portion having a designated mounting direction to a vehicle can comprise: an outer shoulder land portion having a greatest width, in the tire axial direction, of a ground contact surface among five land portions. The outer shoulder land portion can include a plurality of outer shoulder sipes connected to an outer shoulder circumferential groove. An outer middle land portion can include a plurality of outer middle sipes extending completely across the outer middle land portion in the tire axial direction. The outer shoulder sipes and the outer middle sipes each can include a pair of sipe walls. The outer shoulder sipes and the outer middle sipes can each include a body portion in which the pair of sipe walls are disposed substantially parallel to each other. A width of a body portion of each outer shoulder sipe can be greater than a width of a body portion of each outer middle sipe.

A pneumatic tire includes two circumferential main grooves disposed in the region on one side of a tire equatorial plane as a boundary and a land portion defined by the two circumferential main grooves. The land portion includes a circumferential narrow groove extending in the tire circumferential direction and sets of a first and a second lug groove extending in the tire lateral direction through the circumferential narrow groove. The first lug groove includes an end portion that opens to the edge portion on one side of the land portion and another end portion that terminates within the land portion. The second lug groove includes an end portion that opens to the edge portion on the other side of the land portion and an end portion that terminates within the land portion. The first lug groove and the second lug groove are alternately disposed in the tire circumferential direction.

In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge on the leading side and the edge on the trailing side each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; a maximum depth of the chamfered portion is less than a maximum depth of the sipe; a sipe width of the sipe is constant in a range from an end portion located on an inner side in a tire radial direction of the chamfered portion to a groove bottom of the sipe; and a raised bottom portion is disposed in at least one section of the chamfered portion.

A tire includes a tread, sidewalls, beads, and pairs of first and second grooves formed in the tread. A first land is between the first grooves, and second lands are between one of the first and second grooves and between another of the first and second main grooves. First sipes and lateral grooves are in the first land, at the same angle, the first sipes being connected to the lateral grooves. The first sipe and the lateral groove open to one of the first grooves. Second sipes and auxiliary grooves are in a bent shape in the second land. The first and second sipes are oriented the same. The auxiliary groove includes first and second portions. An intersection angle of the first portion with the second sipe is within 45° to 90°. A length a of the first portion and a length b of the second portion satisfy 0.05×a≤b≤0.4×a.

The tire has a tread portion axially divided into two shoulder land regions, two middle land regions and one crown land region by two shoulder circumferential grooves and two crown circumferential grooves. The middle land regions are each provided with a single longitudinal sipe, and first and second middle transverse grooves extending from the adjacent shoulder circumferential groove and crown circumferential groove, and terminated without being connected to the longitudinal sipe. The shoulder land regions are each provided with shoulder transverse grooves extending from tread edges and terminated within the respective shoulder land regions.

A tire comprises a directional tread which forms a contact patch AC during running. The tread comprises a plurality of blocks (21A, 21B) which form a contact surface SC. The surface voids ratio is defined by TES=(AC−SC)/AC. The blocks (21A, 21B) are organized into patterns (26) of blocks of pitch P which succeed one another in the circumferential direction (X), in a pattern comprising at least one sipe. The sipes density is defined by the formula

[00001]$\mathrm{SD}=\frac{{.Math.}_{i=1}^n\mathrm{lpyi}}{P*W}*1000,$

where n is the number of sipes, lpyi is the projected distance of the sipe i in the axial direction (Y), and W is the width of the tread. Simultaneously, SD is at least equal to 10 mm-1 and at most equal to 70 mm-1, and TES is at least equal to 0.40 and at most equal to 0.70.