tire

Abstract

To provide a tire with improved handling stability at high speeds. [Solution] A tire having a tread, wherein the tread is composed of a rubber composition containing a rubber component and a filler, the rubber component contains isoprene rubber and styrene-butadiene rubber, the isoprene rubber content in the rubber component is 40% by mass or more, the glass transition temperature Tg of the styrene-butadiene rubber is -60°C or lower, the filler contains silica, the rubber composition contains 130 parts by mass or more of silica per 100 parts by mass of rubber component, and when the thickness of the tread is T (mm) and the total content of filler in the rubber composition per 100 parts by mass of rubber component is F (parts by mass), the T / F ratio is less than 0.16.

Claims

1. A tire having a tread, The tread is composed of a rubber composition containing rubber components and fillers. The aforementioned rubber component contains isoprene-based rubber and styrene-butadiene rubber. The isoprene-based rubber content in the aforementioned rubber component is 40% by mass or more. The glass transition temperature Tg of the styrene-butadiene rubber is -60°C or lower. The aforementioned filler contains silica, The rubber composition contains 130 parts by mass or more of silica per 100 parts by mass of the rubber component. When the thickness of the tread is T (mm) and the total content of filler in the rubber composition relative to 100 parts by mass of the rubber component is F (parts by mass), Tires with a T / F ratio of less than 0.

16.

2. The tire according to claim 1, wherein the rubber composition contains 150 parts by mass or more of silica per 100 parts by mass of the rubber component.

3. The CTAB specific surface area C of the aforementioned silica is 190 m². 2 A tire according to claim 1 or 2, wherein the weight is 1 / g or more.

4. The tire according to claim 1, wherein the rubber composition contains 50 parts by mass or more of a resin component with respect to 100 parts by mass of the rubber component.

5. The tire according to claim 1 or 2, wherein the styrene content of the styrene-butadiene rubber is 20% by mass or more.

6. The tire according to claim 1 or 2, wherein the acetone extract amount AE (mass%) of the rubber composition is 25.0 or more.

7. The tire according to claim 4, wherein the resin component contains at least one selected from the group consisting of C9 resins, dicyclopentadiene resins, and terpene resins.

8. The tire according to claim 1 or 2, wherein the rubber composition contains a mercapto-silane coupling agent.

9. The tire according to claim 4, wherein the resin component contains a liquid resin.

10. The tire according to claim 1 or 2, wherein the rubber composition contains liquid rubber.

11. The tire according to claim 1 or 2, wherein the rubber composition contains vegetable oil.

12. When the amount of acetone extracted from the rubber composition is AE (mass%), A tire according to claim 1 or 2, wherein F×AE is greater than 3500.

13. When the amount of acetone extracted from the rubber composition is AE (mass%), A tire according to claim 1 or 2, wherein T×AE is greater than 400.

14. The CTAB specific surface area of ​​the silica is C(m 2 If you use / g, The tire according to claim 1 or 2, wherein the T / C ratio is less than 0.

10.

15. The maximum load capacity of the aforementioned tire is W L (kg), if the weight of the tire is G (kg), then G / W L The tire according to claim 1 or 2, wherein the coefficient is 0.0170 or less.

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