A method for preparation of a sulfur curable rubber composition, the rubber composition comprising dual cis 1,4-polybutadiene rubbers, a reinforcing filler comprising a combination of carbon black and silica together and dual silica couplers, wherein the method comprises: preparation of a first masterbatch comprising a blend of a first or specialized cis 1,4-polybutadiene elastomer, a filler reinforcement comprising at least one of carbon black and silica together with a first or specialized silica coupler; preparation of a second masterbatch comprising a blend of a second or designated cis 1,4-polybutadiene elastomer, a filler reinforcement comprising at least one of carbon black and silica together with a second or designated silica coupler; and blending said first and second masterbatch together, followed by subsequent addition of zinc oxide and sulfur curatives comprising sulfur and at least one vulcanization accelerator to said blend; wherein said blend contains a reinforcing filler a combination of said carbon back and said silica; wherein the first or specialized cis 1,4-polybutadiene elastomer is the product of 1,3-butdiene polymerized by organic nickel based catalysis; wherein said second or designated cis 1,4-polybutadiene elastomer is the product of 1,3-butdiene polymerized by neodymium based catalysis; wherein said first or specialized silica coupler is or comprises a bis (3-triethoxysilylpropyl) polysulfide having an average of from 3.2 to 3.8 connecting sulfur atoms in its polysulfidic bridge or wherein said first or specialized silica coupler is or comprises an alkoxyorganomercaptosilane of which from zero to 60 percent of its mercapto groups are capped; wherein said second or designated silica coupler is or comprises a bis (3-triethoxysilylpropyl) polysulfide having an average of from 2 to 2.6 connecting sulfur atoms in its polysulfidic bridge or wherein said second or designated silica coupler is or comprises an alkoxyorganomercaptosilane of which from 60 to 100 percent of its mercapto groups are capped; wherein at least one of said first and second masterbatches contains one or more fatty acids for reaction with said subsequently added zinc oxide, wherein said one or more fatty acids comprise at least one of stearic, palmitic, oleic acid and linoleic acid. preparation of a first masterbatch comprising a blend of a first or specialized cis 1,4-polybutadiene elastomer, a filler reinforcement comprising at least one of carbon black and silica together with a first or specialized silica coupler; preparation of a second masterbatch comprising a blend of a second or designated cis 1,4-polybutadiene elastomer, a filler reinforcement comprising at least one of carbon black and silica together with a second or designated silica coupler; and blending said first and second masterbatch together, followed by subsequent addition of zinc oxide and sulfur curatives comprising sulfur and at least one vulcanization accelerator to said blend; wherein said blend contains a reinforcing filler a combination of said carbon back and said silica; wherein the first or specialized cis 1,4-polybutadiene elastomer is the product of 1,3-butdiene polymerized by organic nickel based catalysis; wherein said second or designated cis 1,4-polybutadiene elastomer is the product of 1,3-butdiene polymerized by neodymium based catalysis; wherein said first or specialized silica coupler is or comprises a bis (3-triethoxysilylpropyl) polysulfide having an average of from 3.2 to 3.8 connecting sulfur atoms in its polysulfidic bridge or wherein said first or specialized silica coupler is or comprises an alkoxyorganomercaptosilane of which from zero to 60 percent of its mercapto groups are capped; wherein said second or designated silica coupler is or comprises a bis (3-triethoxysilylpropyl) polysulfide having an average of from 2 to 2.6 connecting sulfur atoms in its polysulfidic bridge or wherein said second or designated silica coupler is or comprises an alkoxyorganomercaptosilane of which from 60 to 100 percent of its mercapto groups are capped; wherein at least one of said first and second masterbatches contains one or more fatty acids for reaction with said subsequently added zinc oxide, wherein said one or more fatty acids comprise at least one of stearic, palmitic, oleic acid and linoleic acid.