Tyre intended to be mounted on a mounting rim, comprising: two beads, which are intended to come into contact with the mounting rim, the mounting rim comprising a substantially radial portion or side and a substantially axial portion or seat, each bead having a radially innermost point positioned with respect to the side at an axial distance D referred to as the axial width at the seat and comprising at least one bead filler made up of at least one rubber composition and of at least one circumferential reinforcing element, the meridian section of the circumferential reinforcing element having a radially innermost point, a radially outermost point and an axially innermost point, the radially innermost point being positioned at a radial distance Z and at an axial distance Y from the radially innermost point of the bead, a carcass reinforcement connecting the two beads and comprising at least one carcass layer extending in each bead radially towards the inside as far as a carcass layer end, for at least one bead, the carcass layer end is positioned radially on the inside of the point of greatest axial width of the tyre and axially on the outside of the axially innermost point of the circumferential reinforcing element, the at least one bead comprises a bead reinforcement, made up of at least one bead layer, which surrounds the bead filler in such a way that the axially outermost end of the bead layer is radially on the outside of the radially innermost end of the carcass layer and such that the axially innermost end of the bead layer is at least radially on the outside of the radially innermost point of the circumferential reinforcing element, where, in the said bead, any part of any arbitrary carcass layer of the carcass reinforcement radially inside of the radially outermost point of the circumferential reinforcing element is axially on the outside of the radially innermost point of the circumferential reinforcing element, characterized in that, for the said bead, the ratio Y/D between the axial distance Y from the radially innermost point of the circumferential reinforcing element to the radially innermost point of the bead, and the axial width of the bead at the seat D, is at least equal to 0.5, in that, for the said bead, the ratio Z/D between the radial distance Z from the radially innermost point of the circumferential reinforcing element to the radially innermost point of the bead, and the axial width of the bead at the seat D, is at most equal to 0.4, in that, for the said bead comprising an external face, the points on the bead reinforcement which are positioned radially on the inside of the radially innermost point of the circumferential reinforcing element are positioned, with respect to the external face of the bead, at a distance, measured perpendicular to the external face of the bead, that represents at most Z/2, half the radial distance Z between the radially innermost point of the bead and the radially innermost point of the circumferential reinforcing element, and in that, for the said bead, the bead filler comprises a bead filler portion at least radially on the inside of the radially innermost point of the circumferential reinforcing element, having an elastic modulus at 10% elongation E21 at least equal to 15 MPa. two beads, which are intended to come into contact with the mounting rim, the mounting rim comprising a substantially radial portion or side and a substantially axial portion or seat, each bead having a radially innermost point positioned with respect to the side at an axial distance D referred to as the axial width at the seat and comprising at least one bead filler made up of at least one rubber composition and of at least one circumferential reinforcing element, the meridian section of the circumferential reinforcing element having a radially innermost point, a radially outermost point and an axially innermost point, the radially innermost point being positioned at a radial distance Z and at an axial distance Y from the radially innermost point of the bead, a carcass reinforcement connecting the two beads and comprising at least one carcass layer extending in each bead radially towards the inside as far as a carcass layer end, for at least one bead, the carcass layer end is positioned radially on the inside of the point of greatest axial width of the tyre and axially on the outside of the axially innermost point of the circumferential reinforcing element, the at least one bead comprises a bead reinforcement, made up of at least one bead layer, which surrounds the bead filler in such a way that the axially outermost end of the bead layer is radially on the outside of the radially innermost end of the carcass layer and such that the axially innermost end of the bead layer is at least radially on the outside of the radially innermost point of the circumferential reinforcing element,