A new study shows that nearly 8,000 e-bike riders sought hospital care for head injuries in 2022. It's a huge increase and the majority of the injured riders were not wearing helmets.

The sophisticated bicycle has attracted fans in Europe and the U.S., but repairs under warranty have bled the company of money.

Electric cars can help reduce climate change, but they are costly. Some commuters in the city say e-bikes are the best way to get around.

Food delivery workers zip around New York City on e-bikes, risking accidents and theft, as they fulfill orders from various apps they call "ghost bosses."