Patent ID: 7441572

Claim:
A pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, expressed as parts by weight per 100 parts by weight of elastomer (phr), (A) 60 to 70 phr of solution-polymerized styrene-butadiene rubber with a bound styrene content of from 38 to 42 percent by weight, a vinyl 1,2 content of from 20 to 25 percent by weight based on the butadiene content, and a Tg of from about −40° C. to about −20° C.; (B) 30 to 40 phr of cis-1,4 polybutadiene having a Tg of from −95° C. to −105° C.; (C) 50 to 150 phr of silica; (D) 30 to 70 phr of processing oil; and (E) 0.5 to 20 phr of a sulfur containing organosilicon compound. wherein the cis-1,4 polybutadiene and the solution-polymerized styrene-butadiene rubber are an immiscible blend, and wherein the rubber composition shows a lower wear as measured by DIN abrasion than for an otherwise identical rubber composition comprising a miscible blend of cis-1,4 polybutadiene and solution-polymerized styrene-butadiene rubber.