Agricultural vehicle tire

A tire for an agricultural vehicle, comprising a tread of width W surmounting a crown reinforcement, the latter surmounting a carcass reinforcement, an equatorial mid-plane dividing the tread into two parts of equal widths, this tread comprising a bearing surface on which a plurality of main lugs are moulded on each side of the equatorial mid-plane, these main lugs being oriented at a mean angle, these main lugs being disposed around the tire at a mean spacing and extending from an edge of the tread to the equatorial mid-plane so as to form a V-shaped pattern, the tip of this V-shaped pattern being adapted to come into contact with the ground first during running, each main lug having a contact face intersecting lateral faces, these lateral faces beginning at the bearing surface of the tread, each main lug having a height Hp and a mean minimum width Ep defined as the mean width along the length of the main lug, this tread also comprising, on each side of the equatorial mid-plane, a plurality of secondary lugs extending between an axial limit of the tread and a width of between 40% and 60% of the half-width of the tread, each said secondary lug being interposed between two said main lugs and having a width Es of between 20% and 40% of the shortest distance between two said main lugs,

• wherein each said main lug comprises, on its trailing lateral face, defined as being the face of which the edge corner intersecting the contact face comes into contact with the ground last, a widened portion having a width D1 at least equal to 20% and at most equal to 30% of the minimum width Ep of the main lug, this widened portion of width D1 extending over an axial distance Li from an external axial limit of the tread, this axial distance Li being at least equal to the axial length Ls of the secondary lug, this widened portion of width D1 being joined to the main lug by an end face inclined at an angle B1 at least equal to 18 degrees and at most equal to 25 degrees, this angle B1 being measured with respect to the circumferential direction, and
• wherein each said secondary lug comprises an end face inclined at an angle S1 with the same orientation as the angle B1 with respect to the circumferential direction, this angle S1 being at least equal to 18 degrees and at most equal to 25 degrees.