| abstract |
The rubber composition of the present invention contains 100% by mass of a rubber component (A) containing 45 to 75% by mass of natural rubber and 25 to 55% by mass of a conjugated diene polymer having a conjugated diene compound portion having a bonded styrene content of 25% or less. The weight average molecular weight in terms of polystyrene measured by GPC is 5,000 or more and less than 40,000, the amount of bonded styrene of the conjugated diene compound portion is less than 10%, and the amount of vinyl bond of the conjugated diene compound portion is 20% or more. At least one kind of conjugated diene polymer containing 1 to 40 parts by mass of an unmodified conjugated diene polymer (B) and a filler (C) and contained in the rubber component (A) is a modified conjugated diene polymer. It is a polymer. From the rubber composition, a tire having further improved on-ice performance and having both excellent on-ice performance and excellent wear resistance can be obtained. |