RUBBER COMPOSITION AND PNEUMATIC TIRE

摘要

Disclosed is a rubber composition that improves fuel economy, wet grip performance, and wear resistance in a balanced manner. Also disclosed is a pneumatic tire using said rubber composition. By mass, said rubber composition contains 100 parts of a rubber component and 5-150 parts silica. At least 5% of the mass of the rubber component comprises a conjugated diene copolymer that has: a constituent unit based on a conjugated diene; and a constituent unit represented by formula (I). At least one end of said conjugated diene copolymer is modified by a compound containing a group represented by formula (II).