The grinder (1) has a frame (1a) equipped with rolling units (1b), where ends of the rolling units are provided with a coupling unit (7). A grinding unit is placed on the frame. A working drum is connected to a drive motor by a transmission (13). The coupling unit and an arm (8) are provided at vertices of a triangle deformable between a first state in which tensile force (F) applied on a towing vehicle (2) to the grinder passes through a longitudinal axis (XX) of the frame and a second state in which the force is laterally offset tension with respect to the longitudinal axis.
