Imagine cruising through the city on a bike at 20 mph without exerting much effort? That's what a hybrid bike can do. Any ordinary bike can be turned into a hybrid through the Copenhagen Wheel—a motorized disk unit that attaches to the rear wheel.
The disk module senses the energy of the rider when pedaling and helps provide a boost when biking long distances or going uphill.
There's even a regenerative component to the disk module: Energy is captured when a rider brakes and this energy is stored for later use in the motor.