Patent ID: 6889737

Claim:
A pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 5 to about 30 phr of high trans random SBR comprising from about 3 to about 30 percent by weight of styrene and a trans 1,4 butadiene content in the polybutadiene segments of the SBR of greater than 60 percent by weight, wherein said high trans random SBR is produced by a process that comprises copolymerizing styrene and 1,3-butadiene in an organic solvent in the presence of a catalyst system that is comprised of (i) an organolithium compound, (ii) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group ha metal salts of glycol ethers, and (iii) an organometallic compound selected from the group consisting of organoaluminum compounds and organomagnesium compounds; and (B) from about 70 to about 95 phr of at least one additional elastomer.