Futuristic Scooter by BMW. The CitySailer concept looks familiar to BMW’s Solo Scooter, and that is probably the effect designer Christopher Kuh wanted. This two-wheeler powered by fuel cells is environmentally friendly, the concept includes a seatbelt and an airbag. For parking the vehicle, the rider needs to push the steering levers forward parallel to the frame. This disposes the seat column and clears it for parking.