An agricultural implement comprises a wheel body with a peripheral groove, a tire with a bead projecting radially inward, and a radial lock which locks the tire around the wheel body. The bead is shaped so as to be housed in the groove when the tire is mounted around the wheel body. The radial lock comprises a first aperture formed in the wheel body, opening into the groove on the one hand and onto a main face of the wheel body on the other hand, at least a second aperture formed in the bead of the tire, opening substantially facing the first aperture, and a pin placed in the first aperture and the second aperture.
