| abstract |
(57) [Summary] [PROBLEMS] To provide a rubber composition for a tire tread which, when used in a tread portion of a pneumatic tire, maintains a high level of operability on ice while ensuring abrasion resistance. SOLUTION: The nitrogen adsorption specific surface area is 10 to 100 parts by weight of a diene rubber containing 40 to 70 parts by weight of NR. 0 to 165 m 2 / g and DBP oil absorption of 90 ~ 130 ml / 100 g of carbon black ~ 40 parts by weight, BET specific surface area 150 ~ 200m 20 to 60 parts by weight of precipitated silica having 2 / g, The total of the carbon black and the precipitated silica is 40 A rubber composition for a tire tread, wherein the amount of the carbon black / the precipitated silica is 0.25 to 1.0 part by weight. |