Abstract: The present application relates to a pneumatic tire having a tread comprised of (a) a diene-based elastomer containing olefinic unsaturation and (b) from 1 to 50 phr of polymeric resinous material comprising from about 4 to about 60 weight percent units derived from piperylene, from about 10 to about 35 weight percent units derived from 2-methyl-2-butene and from about 18 to about 50 weight percent units derived from dicyclopentadiene.

Abstract: Preparation of an elastomer which contains a dispersion of filler reinforcement by forming a filler reinforcement in-situ within the elastomer host, the resulting elastomer/filler composite and tire having component which contains such reinforced elastomer. The invention includes a rubber composition of at least two elastomers wherein one of said elastomers is a pre-formed composite of elastomer and in-situ formed filler reinforcement. A tire having a component of such rubber composition, particularly a tire tread, is specifically contemplated.