Pneumatic tyre having an innerliner comprised or butyl rubber and dispersion of pre-cured diene-based rubber

The present invention relates to a pneumatic rubber tire having an integral innerliner of a sulfur cured rubber composition. The innerliner rubber composition is comprised of at least one elastomer selected from bromobutyl rubber and chlorobutyl rubber which also contains a dispersion therein of precured diene-based rubber particles.