| abstract |
(57) [Abstract] [Purpose] A pneumatic tire having a well-balanced rolling resistance, static friction characteristics and abrasion resistance, which has a tire tread reinforced with at least three kinds of diene rubbers. provide. [Composition] Isoprene / butadiene copolymer rubber, 3, Including at least three kinds of rubber selected from 4-polyisoprene rubber, cis-1,4-polybutadiene rubber and cis-1,4-polyisoprene natural rubber, finely divided silica or a mixture of silica and carbon black, and a silica coupler Further, a rubber compound containing a conventional rubber-curing agent is sulfur-cured by a conventional method to obtain a cured rubber for a tire tread. This is used to obtain a pneumatic tire with well-balanced rolling resistance, static friction characteristics and abrasion resistance. |