Tire With Directional Two-Material Tread, Comprising An Alternation Of Curved Blocks

A tire comprising a directional tread, said tread comprising two edges and a centre, this said tread comprising a plurality of blocks, each block extending continuously along an overall curvature C from one of the edges towards the centre of said tread, forming a block central end, each said block having a width WB and a length LB, said width increasing from the block central end towards the edge, all or some of the blocks of the tread comprising a median sipe of length S, said median sipe extending from the block central end along a curvature C′ substantially identical to the curvature C of the block, the tread being comprised of a first rubber composition based on a diene elastomer, a reinforcing inorganic filler and a plasticizing system, wherein the first rubber composition has a glass transition temperature of between −40° C. and −15° C. and a shear modulus G* measured at 60° C. of between 0.5 MPa and 1.1 MPa, wherein the tire comprises an intermediate layer that is situated under the tread and is in contact with a radially inner face of said tread, and wherein the intermediate layer comprises a second rubber composition having:

• hysteresis losses (P60) of between 9 and 20;
• a Shore A hardness of between 60 and 68.