Bosch Active Line

The 2017 Bosch Active Line is an electric power-assist system. Designed for casual or recreational riders, the system provides quiet, instant-on power able to assist riders up to as much as 20 miles per hour. The smart electronics included with the system integrate seamlessly into a rider's experience, providing precisely the right amount of additional power. Working smoothly with both derailleur and hub-gear systems, in the latter case the Active also offers back-pedal control. Included with the motor is a bar-mounted controller which doubles as a cycling computer.
A very good electric assist system.