Tire with tread for combination of low temperature performance and for wet traction

A pneumatic tire having a circumferential rubber tread of a rubber composition comprised of, based on parts by weight per 100 parts by weight elastomer (phr):

• (A) 100 phr of styrene/butadiene elastomer and cis 1,4-polybutadiene rubber together with liquid styrene/butadiene polymer comprised of;
• (1) about 25 to about 75 phr of a styrene/butadiene elastomer having a Tg in a range of from about −35° C. to about −5° C. and an uncured Mooney viscosity (ML1+4) 100° C. in a range of from about 60 to about 100, and
• (2) about 25 to about 75 phr of high cis 1,4-polybutadiene rubber having a Tg in a range of from about −100° C. to about −109° C., a cis 1,4-isomeric content of at least about 95 percent and an uncured Mooney viscosity (ML1+4) 100° C. in a range of from about 50 to 100, together with
• (3) about 3 to about 50 phr of low molecular weight liquid styrene/butadiene polymer having a number average molecular weight in a range of from about 3,000 to about 30,000 and a Tg in a range of from about −30° C. to about 0° C.,
• (B) about 50 to about 250 phr of rubber reinforcing filler comprised of a combination of precipitated silica and rubber reinforcing carbon black in a ratio of precipitated silica to rubber reinforcing carbon black of at least 9/1, together with silica coupling agent having a moiety reactive with hydroxyl groups on said precipitated silica and another different moiety interactive with said diene-based elastomers and polymer,
• (C) about 5 to about 35 phr of traction promoting resin consisting of styrene-alphamethylstyrene resin having a softening point in a range of from about 60° C. to about 125° C. and a styrene content of from about 10 to about 30 percent, and
• (D) about 10 to about 50 phr of vegetable triglyceride oil comprised of soybean oil
• wherein said styrene/butadiene elastomer is a functionalized tin or silicon coupled elastomer having functional groups comprised of at least one of amine, siloxy and thiol groups reactive with hydroxyl groups on said precipitated silica.