| abstract |
An object of the present invention is to provide a rubber composition capable of highly achieving both wet performance of a tire, low rolling resistance, and steering stability on a dry road surface, and a solution thereof is a natural rubber ( A1) and a modified conjugated diene polymer (A2), a rubber component (A), and a thermoplastic resin (B), and the natural rubber (A1) in the rubber component (A). Content of 30% by mass or more, and the modified conjugated diene polymer (A2) has a weight average molecular weight of 20 × 10 4 or more and 300 × 10 4 or less, and the modified conjugated diene polymer (A2). ), A modified conjugated diene polymer having a molecular weight of 200 × 10 4 or more and 500 × 10 4 or less is contained in an amount of 0.25% by mass or more and 30% by mass or less, and a contraction factor (g ′) is 0. It is a rubber composition characterized by being less than 64. |