At the UO-211booth, which was located in the Special Area To Start-Ups of the Eurobike 2019 international bicycle exhibition, we presented two new Avial bikes prototypes, one of which was equipped with a mid-drive motor, and the other could be easily equipped with a rear-wheel drive up to 350W. It was not only our first exhibition but also the first public presentation of our prototypes, the fate of which largely depended on the feedback of visitors. Together with the guests…