Tire with tread containing carboxylated styrene/butadiene rubber

A tire is disclosed having a circumferential tread of a sulfur cured rubber composition which comprises, based on parts by weight per 100 parts by weight of rubber (phr): (A) 100 phr of conjugated diene-containing elastomers comprising: (1) from 10 to 65 phr of carboxylated styrene/butadiene rubber (x-SBR), and (2) 35 to 90 phr of at least one additional elastomer(s) comprising at least one of solution polymerization prepared styrene/butadiene rubber (S-SBR) or emulsion polymerization prepared styrene/butadiene rubber (E-SBR); and (B) 50 to 150 phr of a particulate reinforcing filler comprising rubber reinforcing carbon black.