Mobile surface treatment appliance

The apparatus has landing gear (5) that is provided with the motor (9) propelled in drive axle (A). The drive wheel (2) is connected through a steering shaft bearing (4) and a steering shaft (3) with the carrier and is rotatable around a steering axis to form running surface of the drive wheel on the outside surface of the steering axis. A steering shaft is held around the steering shaft bearing. An additive wheel (7) is connected over an axle extension around the drive axle and driving wheel is located around the drive axle of rotatable shaft in axial direction.