Tire with chafer component

A pneumatic tire having a composite of a chafer component, where said chafer component is a rubber composition containing specialized cis 1,4-polybutadiene elastomer comprised of, based on parts by weight per 100 parts by weight of rubber (phr):

• (A) 100 phr of conjugated diene-based elastomers comprised of:
• (1) specialized cis 1,4-polybutadiene elastomer, and
• (2) additional conjugated diene based elastomer comprised of at least one of polymers of at least one of isoprene and 1,3-butadiene and copolymers of styrene and at least one of isoprene and 1,3-butadiene, and
• (B) rubber reinforcing filler comprised of a combination of rubber reinforcing carbon black and precipitated silica, and:
• (C) coupling agent for said precipitated silica having a moiety reactive with hydroxyl groups on said precipitated silica and another different moiety interactive with said elastomer(s);
• wherein said specialized cis 1,4-polybutadiene elastomers are comprised of:
• (1) a first specialized cis 1,4-polybutadiene elastomer having a microstructure comprised of about 94 to about 99 percent cis 1,4-isomeric units and a vinyl 1,2-content of less than one percent, alternately in a range of from about 0.2 to about 0.8 percent, a number average molecular weight (Mn) in a range of from about 180,000 to about 350,000 with less than 5, alternately about zero, percent, of the rubber having a weight average molecular weight (Mw) of less than 100,000;
• and a heterogeneity index (Mw/Mn) in a range of from about 1.4/1 to about 2/1, or
• (2) a second specialized cis 1,4-polybutadiene having a microstructure comprised of about 94 to about 99 percent cis 1,4-isomeric units and a vinyl 1,2-content of less than one percent, alternately in a range of from about 0.2 to about 0.8 percent, a number average molecular weight (Mn) in a range of from about 150,000 to about 300,000 with less than 10, alternately from about 2 to about 10, percent, of the rubber having a weight average molecular weight (Mw) of less than 100,000;
• and a heterogeneity index (Mw/Mn) in a range of from about 1.4/1 to about 2/1, wherein the polybutadiene is sulfur dichloride, disulfur dichloride or thionylcloride treated to cause a molecular weight jump.