A pneumatic tire includes at least three circumferential grooves extending in a tire circumferential direction in the tread portion, and at least four ribs defined by the at least three circumferential grooves, the at least four ribs extending in the tire circumferential direction. At least two of the ribs including the rib disposed on a first side of a tire equatorial plane in a tire width direction and the rib disposed on a second side protrude to an outer side in a tire radial direction beyond a profile line of a tread surface when viewed in the meridian cross section. The protruding amount decreases in order from the first side in the tire width direction to the second side, and the groove surface area ratio of the tread surface is greater on the second side of the tire equatorial plane in the tire width direction than on the first side.

A pneumatic tire (1) has a tread (2), the direction (R) of rotation of the tread (2) being specified. Crown main grooves (3) and shoulder main grooves (4) are provided in the tread (2) to thereby define middle lands (5B). Each of the middle lands (5B) is provided with middle lateral grooves (18) arranged in separating from each other so as to define middle blocks (20). Each of the middle blocks (20) is provided with: a middle narrow groove (21) which extends from a middle lateral groove (18) on the trailing landing side, in the direction (R) of rotation, toward the leading landing side and which terminates without reaching a middle lateral groove (18) on the leading landing side; an inner sipe (S2) disposed on the inside of the middle narrow groove (21) in the axial direction of the tire; and an outer sipe (S3) disposed on the outside in the axial direction of the tire. The width (W6a) of the middle narrow grooves (21) and the direction of tilt of the inner and outer sipes (s2, s3) are limited to predetermined ranges.

A tire for a motorbike can improve turning performance and dry grip performance with good balance. In a tire for a motorbike, a tread part is provided with a first inclined groove and a second inclined groove disposed closer to a tread end than is the first inclined groove. The first inclined groove is provided to a forward-movement grounded area. An inner end of the second inclined groove is provided in an area within a range 2% of a tread expansion radius centered about an end edge of the forward-movement grounded area. An outer end of the second inclined groove is provided to a position displaced from the inner end of the second inclined groove toward the tread end by an interval 20%-30% of the tread expansion radius. Either no other grooves besides the second inclined groove are provided to a second inclined groove formation area, or the length of the area in the direction of expansion width where another groove is located in the second inclined groove formation area is 25% or less of the expansion width of the second inclined groove formation area.

A tire for a two-wheeled motor vehicle has a tread (2) including: a center region (Cr); a pair of middle regions (Mr) located on both sides of the center region (Cr); and a pair of inner shoulder regions (Sr) located on both sides of the middle regions (Mr). The tread (2) has provided therein: inner tilted grooves (10) having outer ends (10e) provided within the middle regions (Mr); and outer tilted grooves (11) having inner ends (11i) provided within the middle regions (Mr). The groove area ratio of the center region (Cr) is from 34% to 39%, the groove area ratio of the middle regions (Mr) is from 14% to 19%, and the groove area ratio of the inner shoulder regions (Sr) is from 14% to 19%.

A tread for a tire includes a first circumferential main groove, a second circumferential main groove, and a third circumferential main groove. The first, second, and third circumferential main grooves together define a first shoulder rib, a first intermediate rib, a second intermediate rib, and a second shoulder rib. The third circumferential main groove includes a plurality of connecting bridges spaced circumferentially within the third circumferential main groove and axially joining the second intermediate rib and second shoulder rib.

Heel-and-toe wear can be suppressed while securing snow performance. Includes: a block (14) that is provided at a tread (16), and that is demarcated by mutually intersecting circumferential direction main grooves (22) and lateral main grooves (24) (main grooves) respectively extending around a tire circumferential direction and along a tire width direction; a first step portion (11) that extends along a wall portion (14F) at one tire circumferential direction side of the block (14), and that has a height from a groove bottom (24A) of the lateral main groove (24) (main groove) where the one side wall portion (14F) is present, which is lower than a tread face (14A); and a second step portion (12) that extends along a side wall portion (14R) at another tire circumferential direction side of the block (14), that has a height from a groove bottom (24A) of the lateral main groove (24) (main groove) where the other side wall portion (14R) is present, which is lower than the tread face (14A), and that has a smaller width than the first step portion (11).

A winter tire includes a tread portion provided with first inclined main grooves extending from a first tread edge near a tire equator, second inclined main grooves extending from a second tread edge near the tire equator, a first inner longitudinal groove connecting a pair of first inclined main grooves at the vicinity of the tire equator and a second inner longitudinal groove connecting a pair of second inclined main grooves at the vicinity of the tire equator. Each of the first inclined main grooves includes an axially first inner end portion extending along an axial direction of the tire to the second inner longitudinal groove, and each of the second inclined main grooves includes an axially second inner end portion extending along the axial direction of the tire to the first inner longitudinal groove.

A tire includes primary inclined grooves and auxiliary inclined grooves. Each primary inclined groove has a first gently inclined portion and a first steeply inclined portion. Each auxiliary inclined groove has a second gently inclined portion and a second steeply inclined portion. Each primary inclined groove does not communicate with a circumferential groove on the tire equator line side and extends beyond a tread edge outward in a tire width direction. Each auxiliary inclined groove does not communicate with the circumferential groove on the tire equator line side, and does not reach the tread edge but terminates on the tire equator line side.

Present disclosure provides a tread for a tire having a plurality of contact element having a height H, and at least one connecting member connecting a transverse face of the contact element to the transverse face of the circumferentially adjacent contact element extending continuously through two transverse faces of the same contact element, a distance h between one of the connecting member in a groove and a radial position of the contact face being at most equal to 50% of the height H, and a material of the connecting member being different from a material of the contact element, a young modulus of the material of the connecting member being higher than that of the contact element, a distance h between one of the connecting member in the contact element and the contact face in tire radial direction is greater than the distance h of the same connecting member.

In order to suppress an excessive increase in the temperature of a tread section, a tire includes: a first land portion that is formed to a tread section by providing plural circumferential direction grooves extending around a tire circumferential direction at a spacing in a tire width direction, and that includes plural first recesses provided around the tire circumferential direction of a wall face of the first land portion; and a second land portion that has a wider width than the first land portion, and that includes a greater number of second recesses than the number of the first recesses provided around the tire circumferential direction of a wall face of the second land portion.