Bead of a tire for a heavy vehicle of the construction plant type

A tire for a heavy vehicle of the construction plant type, comprising two beads intended to come into contact with a rim and connected to one another by a carcass reinforcement comprising at least one carcass layer,

• wherein the or each carcass layer comprises a main part wrapped, in each bead, axially from the inside towards the outside of the tire, around a bead wire having a diameter, to form a turnup having a free end,
• wherein each bead comprises a filling element extending radially towards the outside from the bead wire and axially between the turnup and the main part, the filling element comprising a first filling compound and a second filling compound at least partially in contact with one another, with the first filling compound extending radially towards the outside from the bead wire as far as a radially outermost point of the first filling compound and in contact with the main part, the point being radially positioned on the outside of a radially innermost point of the bead wire at a radial distance, the second filling compound extending radially towards the outside from the bead wire, along the turnup, and axially towards the inside from the turnup, in contact with the bead wire,
• wherein the distance between the turnup and the main part decreases continuously from the bead wire as far as a first minimum distance reached at a first point of the turnup, then increases continuously from the first point of the turnup as far as a first maximum distance reached at a second point of the turnup,
• wherein the distance between the turnup and the main part decreases continuously from the second point of the turnup as far as a second minimum distance reached at a third point of the turnup radially on the inside of the free end of the turnup,
• wherein the distance between the turnup and the main part increases continuously from the third point of the turnup as far as a second maximum distance reached at a fourth point of the turnup that is radially on the inside of the free end of the turnup, and
• wherein the radial distance between the radially outermost point, of the first filling compound and in contact with the main part, and the radially innermost point of the bead wire is at most equal to the radial distance between the first point of the turnup, corresponding to the first minimum distance, and the radially innermost point of the bead wire.