Lots of us have Omnibots or 2000 models where rubber has fallen off , you can mod the wheels and add treads. Most of us wheel only add treads to the first two sets because they have the groove where rubber usually goes. However if you buy spare drive wheels cheap with no tread then you can have the drive system pictured. Otherwise if you still keep the dummy wheels in the back the tread will only lace over the front two sets of drive wheels regular omnibot can do this too , use toy tank treads or the rad 2.0 rubber ones and cut down to length and re-glue