A foot-propelled wheeled hobby and/ or sport device which has a central wheel having a flexibly deformable tyre and wheel axle, a frame including side plates connected to each other and located on both sides of the central wheel at a distance therefrom and foot plates on the lower part of the side plates protruding outwards from the side plates, the foot plates being located below the wheel axle which has a wheel hub, and a satellite wheel having a running surface, connected to the frame, with a diameter smaller than the central wheel, characterised by - the satellite wheel defining a main propelling direction, forward direction, of the device, in which the satellite wheel is located in front of the central wheel; - the frame having a front frame member and rear frame member stiffening the side plates, running along their respective side edges opposite each other; - stable stiffening members connected at end parts of the foot plates to lower ends of the frame members (21a, 21b); - height above ground of the running surface of the satellite wheel being based on the flexibility of the flexibly deformable tyre of the central wheel so that when the flexibly deformable tyre is depressed in use the satellite wheel comes into contact with the ground, so ensuring that the foot plates are substantially horizontal; and the satellite wheel being a load bearing wheel when the device is travelling in the forward direction in use; the device having an extension arm protruding forwards from the point of view of the main direction of propelling of the device is connected to the frame, to ends of lower extension beam parts (25a, 25b) of the front frame member, to an end part of which extension arm, underneath the extension arm, a fork-shaped supporting arm is fixed arranged inwardly, i.e. extending in the direction of the central wheel, and may be rotated around a vertical axle which protrudes downward fixed in the arm, attached to an inner end part of the supporting arm there is the satellite wheel with a horizontal axle positioned under the extension arm. - the satellite wheel defining a main propelling direction, forward direction, of the device, in which the satellite wheel is located in front of the central wheel; - the frame having a front frame member and rear frame member stiffening the side plates, running along their respective side edges opposite each other; - stable stiffening members connected at end parts of the foot plates to lower ends of the frame members (21a, 21b); - height above ground of the running surface of the satellite wheel being based on the flexibility of the flexibly deformable tyre of the central wheel so that when the flexibly deformable tyre is depressed in use the satellite wheel comes into contact with the ground, so ensuring that the foot plates are substantially horizontal; and the satellite wheel being a load bearing wheel when the device is travelling in the forward direction in use; the device having an extension arm protruding forwards from the point of view of the main direction of propelling of the device is connected to the frame, to ends of lower extension beam parts (25a, 25b) of the front frame member, to an end part of which extension arm, underneath the extension arm, a fork-shaped supporting arm is fixed arranged inwardly, i.e. extending in the direction of the central wheel, and may be rotated around a vertical axle which protrudes downward fixed in the arm, attached to an inner end part of the supporting arm there is the satellite wheel with a horizontal axle positioned under the extension arm. the satellite wheel being a load bearing wheel when the device is travelling in the forward direction in use; the device having an extension arm protruding forwards from the point of view of the main direction of propelling of the device is connected to the frame, to ends of lower extension beam parts (25a, 25b) of the front frame member, to an end part of which extension arm, underneath the extension arm, a fork-shaped supporting arm is fixed arranged inwardly, i.e. extending in the direction of the central wheel, and may be rotated around a vertical axle which protrudes downward fixed in the arm, attached to an inner end part of the supporting arm there is the satellite wheel with a horizontal axle positioned under the extension arm.