A radio-controlled vehicle, in particular a radio-controlled lawn mower, comprising: a frame; an engine, in particular an internal combustion engine; two or more rolling units (3A, 3B) to cause the radio-controlled vehicle, in use, to move on a ground; a drive system (10A, 10B) for each respective rolling unit (3A, 3B); a remote control; a control unit, which exchanges signals with the remote control, the engine and each drive system (10A, 10B); the radio-controlled vehicle comprising a belt drive assembly interposed between said engine and each drive system (10A, 10B); wherein said drive assembly is operated by said engine and causes the rotation of each drive system (10A, 10B); the engine comprising a drive shaft having a first vertical rotation axis, which is substantially perpendicular to the ground; the drive shaft vertically projecting downwards from the engine; the radio-controlled vehicle being characterized in that the belt drive assembly comprising, in turn: - a first drive pulley, which is fitted around said drive shaft; - a transmission member, which can rotate around a second axis, which is parallel to said first axis; the transmission member comprising, in turn, a first transmission pulley and a second transmission pulley, which are integral to one another and can rotate around the second rotation axis; - a first belt, which is fitted both around said first drive pulley and around said first transmission pulley so as to transmit the motion from the drive shaft to said transmission member; - a second belt, which is fitted both around said second transmission pulley and around a first rotary drive member so as to transmit the motion from said first transmission member to a first drive system, and - a third belt, which is fitted both around said second transmission pulley and around a second rotary drive member so as to transmit the motion from said transmission member to a second drive system; - wherein said second transmission pulley is vertically above said first transmission pulley. the engine comprising a drive shaft having a first vertical rotation axis, which is substantially perpendicular to the ground; the drive shaft vertically projecting downwards from the engine; the radio-controlled vehicle being characterized in that the belt drive assembly comprising, in turn: - a first drive pulley, which is fitted around said drive shaft; - a transmission member, which can rotate around a second axis, which is parallel to said first axis; the transmission member comprising, in turn, a first transmission pulley and a second transmission pulley, which are integral to one another and can rotate around the second rotation axis; - a first belt, which is fitted both around said first drive pulley and around said first transmission pulley so as to transmit the motion from the drive shaft to said transmission member; - a second belt, which is fitted both around said second transmission pulley and around a first rotary drive member so as to transmit the motion from said first transmission member to a first drive system, and - a third belt, which is fitted both around said second transmission pulley and around a second rotary drive member so as to transmit the motion from said transmission member to a second drive system; - wherein said second transmission pulley is vertically above said first transmission pulley. - a first drive pulley, which is fitted around said drive shaft; - a transmission member, which can rotate around a second axis, which is parallel to said first axis; the transmission member comprising, in turn, a first transmission pulley and a second transmission pulley, which are integral to one another and can rotate around the second rotation axis; - a first belt, which is fitted both around said first drive pulley and around said first transmission pulley so as to transmit the motion from the drive shaft to said transmission member; - a second belt, which is fitted both around said second transmission pulley and around a first rotary drive member so as to transmit the motion from said first transmission member to a first drive system, and - a third belt, which is fitted both around said second transmission pulley and around a second rotary drive member so as to transmit the motion from said transmission member to a second drive system; - wherein said second transmission pulley is vertically above said first transmission pulley.