the invention provides a tire having a carcass ply , an inner elastomeric layer for sealing against inflation gases and an intermediate elastomeric layer between the carcass ply and inner layer , in which the intermediate reinforcement layer is formed from a rubber composition comprising : a natural or synthetic polyisoprene having a majority of chains with cis - 1 , 4 bonds and a copolymer prepared in solution of one or more conjugated diene monomers and one or more vinyl aromatic monomers , said copolymer simultaneously satisfying the following relationships : d ≧ 60 − 1 . 75 . va d ≦ 116 − 1 . 64 . va d & gt ; 10 va & gt ; 10 , wherein d is the amount of diene chains having a 1 , 2 bond content and va is the amount of vinyl aromatic chains , and carbon black , in an amount of 25 to 85 parts by weight per hundred parts of said elastomer , wherein said carbon black has values of dbp oil absorption and of bet specific surface area which fulfil the following relationship : dbp ≦− 0 . 88 . bet + 190 .