Tire rubber composition, tread rubber, and tire

Abstract

An object of the present disclosure is to provide a rubber composition for tires capable of achieving an excellent balance among high fuel efficiency, wet braking performance, and wear resistance performance, and the solution is a rubber composition for tires including a rubber component and a filler. The rubber component includes at least an isoprene skeleton rubber and a styrene-butadiene rubber. The filler includes at least silica. The following formula (X) and the following formula (Y) are satisfied: 10≤A0.5+B1.5≤100 . . . (X) (where A is a content (parts by mass) of the isoprene skeleton rubber in 100 parts by mass of the rubber component, and B is a bound styrene content (mass %) of the styrene-butadiene rubber), and 0.55≤C/D≤0.75 . . . (Y) (where C is a content (parts by mass) of the silica relative to 100 parts by mass of the rubber component, and D is a content (parts by mass) of the filler relative to 100 parts by mass of the rubber component).

Dependencies are inferred from the claim text.