RUBBER TIRE-TREAD COMPOSITION AND PASSENGER-VEHICLE PNEUMATIC TIRE USING SAME

There is provided a rubber tire-tread composition comprising (A) a rubber component comprising 30% by mass or higher of one or more isoprene-based rubbers selected from the group consisting of natural rubbers and synthetic isoprene rubbers, and (B) one or more resins selected from the group consisting of C5-based resins and dicyclopentadiene resins in an amount of 5 to 50 parts by mass, and (C) a fatty acid metal salt in an amount of 0.5 to 10 parts by mass, both based on 100 parts by mass of the rubber component.