The problem: My brother uses a wheelchair and just one leg. How can he bike AND have his wheelchair along with him?
The solution: A folding recumbent bike based on his wheelchair as the seat and the wheels as the front wheels for the recumbent bike. The design is quite unique as the bike can be converted back into a wheelchair in just a few seconds as you can see above. The additional challenges were that the brakes had to be integrated into the wheelchair wheels but remain in place once the wheelchair is removed. All operations must be possible with one hand including front and back braking as well as gear shifting and steering.