The present disclosure relates to tires, at least one internal layer of which exhibits good mechanical properties and reduced rolling resistance, the said internal layer comprising a rubber composition based on at least 80 to 100 phr of an isoprene elastomer, a reinforcing filler predominantly comprising carbon black, 1 to 45 phr of reinforcing resin, a salt of an alkaline earth, alkali or lanthanide metal, and a crosslinking system.