Patent ID: 8247487

Claim:
A tire 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 consisting of: (1) from about 10 to about 65 phr of carboxylated styrene/butadiene rubber (x-SBR), and (2) about 35 to about 90 phr of additional elastomer(s), consisting of at least one of solution polymerization prepared styrene/butadiene rubber (S-SBR), or emulsion polymerization prepared styrene/butadiene rubber (E-SBR) or functionalized solution polymerized styrene/butadiene rubber (f-S-SBR) consisting of solution polymerization prepared styrene/butadiene rubber (S-SBR) containing at least one functional group comprised of amine functional group, siloxy functional group, combination of amine and siloxy functional groups, combination of thiol and siloxy functional groups, combination of imine and siloxy functional groups, hydroxyl functional group, and epoxy group, (B) about 50 to about 150 phr of particulate reinforcing filler consisting of rubber reinforcing carbon black, wherein said tread rubber composition is exclusive of silica reinforcement, wherein said tread rubber composition is exclusive of carboxylated nitrile rubber (x-NBR), and wherein, said rubber composition contains rubber reinforcing carbon black in a range of from about 80 to about 130 phr.