This invention relates to a vehicular tire containing at least one boron nitride reinforced polyurethane component. The polyurethane component is a cast polyurethane containing a dispersion of a layered hexagonally crystalline boron nitride (h-BN) particles. The polyurethane is the product of a castable liquid polyurethane reaction mixture derived from polyisocyanate and polymeric polyols without containing carbon-to-carbon bonds as distinguished from carbon-to-carbon double bond containing millable, sulfur curable, polyurethanes. It may sometimes be referred to as being a cast polyurethane.