Gears play a vital role in mechanical performance, requiring precise shaping and strong construction. Carefully bored hubs ensure smooth alignment, reducing friction and improving longevity.

"I was struggling with transportation," he said. "It meant a lot for me." The Portland Gear Hub, a nonprofit that donates bikes to people in need, provided Malaba with a free bicycle—giving him ...

ADO has co-developed a hub motor with Bafang that sports 3-speed auto-shifting gears. The first model to roll with this system is the Air 30 Ultra city ride, which also comes with a 100-km battery ...