Bicycle drivetrain systems

To change gears, the rider would stop and dismount, remove the rear wheel and reinstall it in the reverse direction.

Bicycle drivetrain systems have been developed to collect power from riders by a variety of methods.

Bicycle drivetrain systems have been developed to transmit power from riders to drive wheels by a variety of methods.

Another interpretation of direct-drive is that the rider pushes directly against the ground with a foot, as employed in balance bicycles, kick scooters, and chukudus.

[12] Their AWD system, aimed at mountain bikers, comprises an adapted differential that sends power to the front wheel once the rear begins to slip.