Bicycle automatic transmission.

[RobertC]

Bicycle automatic transmission.

Watch the demo video y'all. ..the concept is cool as heck !

https://arstechnica.com/cars/2023/1...t-is-wild-and-spiky-and-could-be-a-big-shift/

 

[hermans13]

RobertC, After watching the video a second time, I realized that the big sprocket/pedal sprocket is of a special design.
Neat stuff, thanks for sharing.