Tyre intended to be mounted on a mounting rim, comprising: two beads, which are intended to come into contact with the mounting rim, each bead having a radially innermost point, an axial width at the seat D, and an external face made up of the surface of the tyre in contact with the outside of the tyre and belonging to the bead, and each bead comprising at least one bead filler made up of at least one rubber composition and of at least one circumferential reinforcing element referred to as the main circumferential reinforcing element, the meridian section of the main 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, the axial width at the seat D being measured between the radially innermost point of the bead and the point of intersection between a first straight line tangential to the external axial projection of the radially innermost point of the main circumferential reinforcing element and a second straight line tangential to the internal radial projection of the axially outermost point of the main circumferential reinforcing element, 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 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 main circumferential reinforcing element, for the said bead, the ratio Y/D between the axial distance Y from the radially innermost point of the main 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, the said 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 main circumferential reinforcing element, for the said bead, the points on the bead reinforcement which are positioned radially on the inside of the radially innermost point of the main circumferential reinforcing element are positioned, with respect to the external face of the bead, at a maximum distance 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 main circumferential reinforcing element, the said bead comprises at least one additional circumferential reinforcing element, axially on the inside of the axially innermost point of the main circumferential reinforcing element, radially on the outside of a radially innermost part of the bead reinforcement and radially on the inside of the radially outermost point of the main circumferential reinforcing element, characterized in that for the said bead, the ratio Z/D between the radial distance Z from the radially innermost point of the main 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. two beads, which are intended to come into contact with the mounting rim, each bead having a radially innermost point, an axial width at the seat D, and an external face made up of the surface of the tyre in contact with the outside of the tyre and belonging to the bead, and each bead comprising at least one bead filler made up of at least one rubber composition and of at least one circumferential reinforcing element referred to as the main circumferential reinforcing element, the meridian section of the main 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, the axial width at the seat D being measured between the radially innermost point of the bead and the point of intersection between a first straight line tangential to the external axial projection of the radially innermost point of the main circumferential reinforcing element and a second straight line tangential to the internal radial projection of the axially outermost point of the main circumferential reinforcing element, 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 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 main circumferential reinforcing element, for the said bead, the ratio Y/D between the axial distance Y from the radially innermost point of the main 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,