Tire for an Agricultural Vehicle Comprising an Improved Tread

A tire for an agricultural vehicle, having a nominal section width L and comprising, radially from the outside to the inside, a tread and a crown reinforcement;

• the tread comprising tread pattern elements, which are separated from one another by voids and extend radially outwards from a bearing surface to a tread surface,
• the tread having an overall volumetric void ratio TEV, defined as being the ratio between the volume VC of voids and the total volume V of the tread assumed to be free of voids, comprised between the bearing surface and the tread surface,
• each tread pattern element having a circumferential slenderness H/B at most equal to 1.5, H being a mean radial height between the bearing surface and the tread surface at least equal to 20 mm, and B being a mean circumferential length,
• the tread comprising a central portion, centred on an equatorial plane (E) of the tire and having an axial width L1 at least equal to 0.15*L and at most equal to 0.35*L, and two intermediate portions, each of which continues the central portion axially outwards to an axial distance D2 equal to 0.3*L, measured from the equatorial plane (E),
• the central portion and each intermediate portion respectively being made up of a circumferential distribution of tread pattern elements, which are separated in pairs by transverse voids forming an angle at least equal to 30° with a circumferential direction (XX′) of the tire,
• the crown reinforcement comprising at least two crown layers, each of which comprises mutually parallel reinforcers that are coated with an elastomeric material, are crossed from one layer to the next, and form an angle at least equal to 10° with the circumferential direction (XX′),
• wherein the central portion has a local volumetric void ratio TEVL1, defined as being the ratio between the volume VC1 of the transverse voids and the total volume V1 of said central portion, comprised between the bearing surface and the tread surface, at most equal to 15%.