Agricultural implement of the type comprising a one-piece tyre including a radially outer part comprising a tread and two sidewalls (55, 56) and a radially inner part comprising a tread plate by which the tyre is mounted on a wheel body, characterised in that: - the tyre further includes an intermediate part which corresponds with the tread plate to the radially inner part, arranged between the tread and the tread plate, this intermediate part comprising a substantially annular intermediate wall, extending between the tread and the tread plate and connecting the two sidewalls (55, 56) to one another so as to form with the tread and the two sidewalls (55, 56) a casing around a chamber, which corresponds to the radially outer part of the tyre, while the remainder of the intermediate part connects the intermediate wall to the tread plate, the intermediate part having a footprint with a width less than or equal to that of the casing, the intermediate part has a hollowed structure comprising a hollow space or a plurality of apertures, said hollowed structure being located radially below the casing and delimited by the intermediate wall and the tread plate, and configured such that part of the material constituting the intermediate part partially occupies said hollow space or said apertures when a compressive force is applied between the tread and the tread plate such that the intermediate part collapses more than the casing while maintaining a footprint with a width less than or equal to that of the casing when said compressive force is applied to the tread. - the tyre further includes an intermediate part which corresponds with the tread plate to the radially inner part, arranged between the tread and the tread plate, this intermediate part comprising a substantially annular intermediate wall, extending between the tread and the tread plate and connecting the two sidewalls (55, 56) to one another so as to form with the tread and the two sidewalls (55, 56) a casing around a chamber, which corresponds to the radially outer part of the tyre, while the remainder of the intermediate part connects the intermediate wall to the tread plate, the intermediate part having a footprint with a width less than or equal to that of the casing, the intermediate part has a hollowed structure comprising a hollow space or a plurality of apertures, said hollowed structure being located radially below the casing and delimited by the intermediate wall and the tread plate, and configured such that part of the material constituting the intermediate part partially occupies said hollow space or said apertures when a compressive force is applied between the tread and the tread plate such that the intermediate part collapses more than the casing while maintaining a footprint with a width less than or equal to that of the casing when said compressive force is applied to the tread. this intermediate part comprising a substantially annular intermediate wall, extending between the tread and the tread plate and connecting the two sidewalls (55, 56) to one another so as to form with the tread and the two sidewalls (55, 56) a casing around a chamber, which corresponds to the radially outer part of the tyre, while the remainder of the intermediate part connects the intermediate wall to the tread plate, the intermediate part having a footprint with a width less than or equal to that of the casing, the intermediate part has a hollowed structure comprising a hollow space or a plurality of apertures, said hollowed structure being located radially below the casing and delimited by the intermediate wall and the tread plate, and configured such that part of the material constituting the intermediate part partially occupies said hollow space or said apertures when a compressive force is applied between the tread and the tread plate such that the intermediate part collapses more than the casing while maintaining a footprint with a width less than or equal to that of the casing when said compressive force is applied to the tread.