Reinforced rubber composition with combination of functionalized elastomer, liquid polymer and resin and tire with tread thereof

A rubber composition is described comprising, based on parts by weight per 100 parts by weight elastomer (phr): (A) solid conjugated diene-based elastomers having a number average molecular weight (Mn) of greater than 100,000 g/mol comprising styrene/butadiene elastomer (SBR) and at least one of cis 1,4- or trans 1,4-polybutadiene elastomers (BR), with a weight ratio of the SBR to the BR in a range of from 70/30 to 20/80; wherein the SBR has a Tg in a range of from -40°C to 0°C, and contains 5 to 50 percent bound styrene; wherein the BR has a Tg in a range of from -80°C to -110°C; (B) 2 to 40 phr of liquid styrene/butadiene polymer (L-SBR) having a bound styrene content in a range of from 5 to 50 percent, a Tg in a range of from - 35°C to 0°C, and a number average molecular weight (Mn) in a range of from 1,000 to 50,000; (C) 40 to 120 phr of particulate reinforcing filler; and (D) 2 to 30 phr of resin having a glass transition temperature (Tg) or softening point temperature (Tm) in a range of from 50°C to 150°C.