RUBBER COMPOSITION, VULCANIZED RUBBER, AND TIRE

Provided are a tire excellent in the balance between on-ice performance and wear resistance, and a vulcanized rubber and a rubber composition from which the tire is obtained. The rubber composition contains: a rubber component containing natural rubber, polybutadiene rubber, and styrene-butadiene copolymer rubber; a silica-containing filler; and an unmodified conjugated diene-based polymer in which a weight average molecular weight in terms of polystyrene is 5,000 or more and less than 40,000, a styrene bond content of a conjugated diene compound portion is less than 10% by mass, and a vinyl bond content of the conjugated diene compound portion is 40% to 65% by mass. A mass n of the natural rubber in the rubber component is 35 to 44% by mass, and a mass b of the polybutadiene rubber, and a mass s of the styrene-butadiene copolymer rubber satisfy a relationship of s≤b, and a content of the conjugated diene-based polymer is 1 to 40 parts by mass per 100 parts by mass of the rubber component.