Is it a car or is it a bicycle, or both - a bicycle car hybrid and hermaphroditic?
The city of Rüsselsheim is more known for cars, because it's the home town of Opel automobile's founder Adam Opel who has been related to Opel cars since the end of the 19th century. So why the car-like two-wheelers? Good question, next question.
No! In car forge Rüsselsheim is also a technical university, the Hochschule Rhein Main. In the meantime, resourceful engineers, technicians, scientists and inventors wanted to deal not only with the state-of-the-art automobile, but also to bring a vehicle on the road in the course of a better mobility without pollution with a weather-independent variant.
Thus, the development of a bicycle with a closed passenger compartment was almost inevitable. That's why, in the vicinity of Rüsselsheim, there are many engineering services of this kind, such as recumbents, payload wheels, two-wheelers, three-wheelers, four-wheelers, and the like.