| abstract |
The present invention improves ordinary-temperature performances, such as wet performance and dry performance, while inhibiting the low-temperature performances from decreasing. The rubber composition for tire treads according to an embodiment comprises 100 parts by mass of a rubber component comprising a styrene/butadiene rubber having a glass transition temperature of -60°C or lower and 70 parts by mass or more of a reinforcing filler comprising silica, the rubber composition giving a vulcanizate which, when examined under the conditions of a frequency of 10 Hz, an initial strain of 10%, and a dynamic strain of ±0.25%, has a storage modulus E'(-20°C) at a temperature of -20°C and a storage modulus E'(30°C) at a temperature of 30°C, the ratio between the two moduli satisfying 2.0≤E'(-20°C)/E'(30°C)≤3.0. |