Rubber Composition for Tire Treads

A rubber composition for tire treads comprising:

• a diene rubber;
• from 1 to 25 parts by weight of an aromatic modified terpene resin;
• from 80 to 150 parts by weight of a silica;
• from 5 to 50 parts by weight of a carbon black;
• an oil component, per 100 parts by weight of the diene rubber;
• and
• from 0.1 to 20 wt. % of the weight of the silica of an alkyltriethoxysilane having an alkyl group having from 3 to 20 carbons,
• the diene rubber containing from 10 to 30 wt. % of a natural rubber, from 10 to 30 wt. % of a solution polymerized styrene butadiene rubber having a styrene unit content of 30 to 40 wt. %, and from 80 to 40 wt. % of an emulsion polymerized styrene butadiene rubber, and
• a ratio of a total amount Woil of an oil-extending component contained in the solution polymerized styrene butadiene rubber and/or the emulsion polymerized styrene butadiene rubber, the aromatic modified terpene resin, and the oil component to a weight WNR of the natural rubber (Woil/WNR) being from 3.0 to 4.0.