Tire

1 . A tire having a tread portion with a thickness of 10 mm or less, wherein a cap rubber layer forming the tread portion is formed from a rubber composition

containing 40 parts by mass or more and 80 parts by mass or less of styrene-butadiene rubber (SBR) with a styrene content of 25% by mass or less and 3% by mass or more, in 100 parts by mass of the rubber component, and in addition to the rubber component, containing silica, sulfur and carbon black;

having loss tangent 30° C. tan δ of more than 0.18 measured under the conditions of temperature of 30° C., frequency of 10 Hz, initial strain of 5%, dynamic strain rate of 1%, and deformation mode: tensile;

having a glass transition temperature Tg (° C.) of −15° C. or lower; and

having a 100% modulus (M100) of 2.7 MPa or more;

wherein

the carbon black content is 15 parts by mass or more, and

the sulfur content is 1.2 parts by mass or more and 1.5 parts by mass or less with respect to 100 parts by mass of the rubber component; and

the ratio of the silica content to the carbon black content is 3.3 or less and

an acetone extractable content (AE) of the cap rubber layer is 6.0% by mass or more, and 1.0% by mass or less, and

wherein the tread portion has a land ratio of 40% or more, and a product of content (parts by mass) of the SBR in 100 parts by mass of the rubber component and the land ratio (%) in the tread portion (content×land ratio) is 3000 or more.

2 . A tire having a tread portion with a thickness of 10 mm or more and 15 mm or less, wherein a cap rubber layer forming the tread portion is formed from a rubber composition

containing 40 parts by mass or more and 80 parts by mass or less of styrene-butadiene rubber (SBR) with a styrene content of 25% by mass or less and 3% by mass or more, in 100 parts by mass of the rubber component, and in addition to the rubber component, containing silica and carbon black;

having loss tangent 30° C. tan δ of 0.4 or more measured under the conditions of temperature of 30° C., frequency of 10 Hz, initial strain of 5%, dynamic strain rate of 1%, and deformation mode: tensile;

having a glass transition temperature Tg (° C.) of −15° C. or lower; and

having a 100% modulus (M100) of 2.7 MPa or more;

wherein

the carbon black content is 15 parts by mass or more with respect to 100 parts by mass of the rubber component, and

the ratio of the silica content to the carbon black content is 3.3 or less and

the ratio (M100/T) of the M100 (MPa) to the thickness T (mm) of the tread portion is 0.27 or more, and

wherein the tread portion has a land ratio of 40% or more, and a product of content (parts by mass) of the SBR in 100 parts by mass of the rubber component and the land ratio (%) in the tread portion (content×land ratio) is 3000 or more.

3 . A tire having a tread portion with a thickness of 10 mm or more and 15 mm or less, wherein a cap rubber layer forming the tread portion is formed from a rubber composition

containing 40 parts by mass or more and 80 parts by mass or less of styrene-butadiene rubber (SBR) with a styrene content of 25% by mass or less and 3% by mass or more, in 100 parts by mass of the rubber component, and in addition to the rubber component, containing silica and carbon black;

having loss tangent 30° C. tan δ of more than 0.18 measured under the conditions of temperature of 30° C., frequency of 10 Hz, initial strain of 5%, dynamic strain rate of 1%, and deformation mode: tensile;

having a glass transition temperature Tg (° C.) of −15° C. or lower; and

having a 100% modulus (M100) of 2.7 MPa or more;

wherein

the carbon black content is 15 parts by mass or more and 45 parts by mass or less with respect to 100 parts by mass of the rubber component,

the ratio of the silica content to the carbon black content is 1 or more,

the ratio (M100/T) of the M100 (MPa) to the thickness T (mm) of the tread portion is 0.27 or more; and

an acetone extractable content (AE) of the cap rubber layer is 6.0% by mass or more, and 15.0% by mass or less, and

wherein the tread portion has a land ratio of 40% or more, and a product of content (parts by mass) of the SBR in 100 parts by mass of the rubber component and the land ratio (%) in the tread portion (content×land ratio) is 3000 or more.

4 . The tire according to claim 3 , wherein the 30° C. tan δ is 0.24 or more.

5 . The tire according to claim 3 , wherein the content of the carbon black is 30 parts by mass or more with respect to 100 parts by mass of the rubber component.

6 . The tire according to claim 3 , wherein the thickness of the cap rubber layer in the entire tread portion is 10% or more.

7 . The tire according to claim 3 , wherein the aspect ratio is 80% or less, and the product of the silica content (parts by mass) with respect to 100 parts by mass of the rubber component and the aspect ratio (the content×the aspect ratio) is 3000 or more.

8 . The tire according to claim 3 , wherein the ratio of the 30° C. tan δ to the thickness T (mm) of the tread portion (30° C. tan δ/T) is 0.02 or more.

9 . The tire according to claim 3 , wherein the rubber composition constituting the cap rubber layer has a glass transition temperature Tg (° C.) of −45° C. or higher and −10° C. or lower.

10 . The tire according to claim 9 , wherein the rubber composition constituting the cap rubber layer has a glass transition temperature Tg (° C.) of −40° C. or higher and −30° C. or lower.

11 . The tire according to claim 3 , wherein the rubber composition constituting the cap rubber layer contains a dispersant.

12 . The tire according to claim 11 , wherein the content of the dispersant is more than 0.5 parts by mass and less than 10 parts by mass with respect to 100 parts by mass of the rubber component.