Tire component containing syndiotactic-1,2-polybutadiene

A pneumatic rubber tire having a circumferential tread of a cap/base configuration comprised of an outer tread cap rubber layer and an internal tread rubber layer where said internal tread rubber layer rubber composition is comprised of, based upon parts by weight per 100 parts by weight rubber (phr):

• (A) rubber(s) comprised of:
• (1) about 10 to about 80 phr of syndiotactic-1,2-polybutadiene, and
• (2) about 90 to about 20 phr of at least one additional diene-based elastomer comprised of at least one of polymers and copolymers of at least one of isoprene and 1,3-butadiene and copolymers of styrene and at least one of isoprene and 1,3-butadiene, a pneumatic rubber tire is provided having a component comprised of a rubber composition comprised of, based on parts by weight per 100 parts by weight rubber (phr):
• (B) elastomer(s) comprised of:
• (1) about 10 to about 80 phr of syndiotactic-1,2-polybutadiene, and
• (2) about 90 to about 20 phr of at least one additional diene-based elastomer comprised of at least one of polymers and copolymers of at least one of isoprene and 1,3-butadiene and copolymers of styrene and at least one of isoprene and 1,3-butadiene,
• (C) up to about 40 phr of filler reinforcement comprised of:
• (1) carbon black, or
• (2) amorphous, synthetic silica (e.g. precipitated silica), or
• (3) combination of carbon black and (said) precipitated silica, or
• (4) platelets of exfoliated clay (e.g. exfoliated montmorillonite clay) in an amount of up to about 10 phr and clay (unexfoliated clay such as, for example, kaolinite clay) in an amount of up to about 40 phr;
• wherein said filler reinforcement comprised of at least one said carbon black and precipitated silica may optionally additionally contain at least one of said platelets of exfoliated clay in an amount of up to about 10 phr and said clay (unexfoliated clay) in an amount of up to about 40 phr;
• wherein said carbon black based filler is comprised of at least one of:
• (5) rubber reinforcing carbon black (C1) having a DBP value in a range of from about 62 to about 150 cc/100 g and an Iodine value in a range of from about 20 to about 205 m2/g in an amount of from about 5 to about 40 phr,
• (6) electrically conductive carbon black (C2) having a DBP value in a range of from about 175 to about 570 cc/100 g and an Iodine value in a range of from about 180 to about 650 m2/g in an amount of from about 5 to about 20 phr,
• (7) graphene platelets (C3) comprised of at least partially exfoliated graphite in an amount of up to about 15 phr, and
• (8) carbon nanotubes (C4) in an amount of up to about 10 phr.