Pneumatic tire, the crown of which is provided with an inner layer for reducing rolling noise

A radial tyre for a motor vehicle, comprising:

• a crown that includes a tread provided with a part located at a radially outer position, the part being intended to come into contact with a road surface;
• two inextensible beads;
• two sidewalls connecting the two inextensible beads to the tread;
• a carcass reinforcement passing into the two sidewalls and anchored in the two inextensible beads;
• a crown reinforcement arranged circumferentially between the part of the tread located at the radially outer position and the carcass reinforcement;
• and
• an inner crown layer located at a radially inner position, the inner crown layer being formed of an elastomeric material having a formulation that is different from a formulation of the part of the tread located at the radially outer position, the inner crown layer being arranged circumferentially between the part of the tread located at the radially outer position and the crown reinforcement or between the crown reinforcement and the carcass reinforcement,
• wherein the elastomeric material of the inner crown layer has a rubber composition that includes:
• 50 to 100 phr of a copolymer based on styrene and butadiene, the copolymer having a glass transition temperature greater than −40° C.,
• a reinforcing filler,
• a hydrocarbon-based plasticizing resin, and
• a crosslinking system.