The small and compact Wheeldrive power assist wheels help wheelchair users increase their mobility and are compatible with most conventional manual wheelchairs with little adjustment. A unique feature of this propulsion system is its dual-rim design. The outer rim offers extra motor support, assisting the user in driving manually. The inner rim provides continuous support while the wheelchair is pushed forwards, thus making driving effortless. Users can decide which kind of propulsion type they wish to use at any given time.