A tire having an axis of rotation and comprising two beads, two sidewalls connected to the beads, and a crown having a first side connected to the radially outer end of one of the two sidewalls and a second side connected to the radially outer end of the other one of the two sidewalls, the crown having a tread, radially on the outside of an underlayer, comprising: ∘ at least one tread pattern block bearing a contact face intended to come into contact with the roadway when the tire is running, the contact face being axially delimited by two axial ends of the tread pattern block, the tread pattern block comprising: a first axial portion extending axially over part of the total width of the tread pattern block and extending circumferentially over at least 75% of the circumference of the tire, said first axial portion bearing a first axial portion of the contact face, said first axial portion comprising a base material; a second axial portion extending axially over part of the total length of the tread pattern block and extending circumferentially over at least 75% of the circumference of the tire, said second axial portion bearing a second axial portion of the contact face, said second axial portion comprising a stiff reinforcing material, the dynamic shear stiffness modulus of which is at least three times greater than that of the base material; ∘ at least one circumferential groove axially delimited by two axial ends (61, 62), one of said axial ends (61,62) of the circumferential groove coinciding with one of the axial ends of the tread pattern block; ∘ at least one recess, which is made in the tread pattern block and bears a contact face of the recess intended to come into contact with the roadway when the tire is running, the contact face of the recess being axially delimited by: the axial end of the circumferential groove that coincides with the axial end of the tread pattern block, and a radial shoulder between the first axial portion and the second axial portion, the recess being radially delimited by a recess bottom, the recess having a depth P less than 2 mm, measured along a radial direction between the bottom of the recess and the radially outermost contact face of the first axial portion, characterized in that the axial width L7 of the recess is within the range [3 x L52, 1.01 × L52], with L7 being the axial width of the contact face of the recess and L52 being the axial width of the contact face of the second axial portion, and in that the ratio of the dynamic shear stiffness modulus of the material of the second portion of the tread pattern block divided by the dynamic shear stiffness modulus of the material of the first axial portion of the tread pattern block is within the range [5;30], the shear stiffness moduli being measured at 23°C, at 10 Hz, and under an alternating shear stress of 10% of the material of each portion. ∘ at least one tread pattern block bearing a contact face intended to come into contact with the roadway when the tire is running, the contact face being axially delimited by two axial ends of the tread pattern block, the tread pattern block comprising: a first axial portion extending axially over part of the total width of the tread pattern block and extending circumferentially over at least 75% of the circumference of the tire, said first axial portion bearing a first axial portion of the contact face, said first axial portion comprising a base material; a second axial portion extending axially over part of the total length of the tread pattern block and extending circumferentially over at least 75% of the circumference of the tire, said second axial portion bearing a second axial portion of the contact face, said second axial portion comprising a stiff reinforcing material, the dynamic shear stiffness modulus of which is at least three times greater than that of the base material; ∘ at least one circumferential groove axially delimited by two axial ends (61, 62), one of said axial ends (61,62) of the circumferential groove coinciding with one of the axial ends of the tread pattern block; ∘ at least one recess, which is made in the tread pattern block and bears a contact face of the recess intended to come into contact with the roadway when the tire is running, the contact face of the recess being axially delimited by: the axial end of the circumferential groove that coincides with the axial end of the tread pattern block, and a radial shoulder between the first axial portion and the second axial portion, the recess being radially delimited by a recess bottom, the recess having a depth P less than 2 mm, measured along a radial direction between the bottom of the recess and the radially outermost contact face of the first axial portion,