Bike motors were discussed fairly in-depth on HN 2 months ago; it seems to be this website's ticket to the front page: https://news.ycombinator.com/item?id=112

Bike motors were discussed fairly in-depth on HN 2 months ago; it seems to be this website's ticket to the front page: https://news.ycombinator.com/item?id=11247598 https://news.ycombinator.com/item?id=11247598