Although some cycling purists may sneer at them, electric bicycles certainly do come in handy when hills need to be climbed on morning commutes, or loads need to be hauled. E-bikes can be quite expensive, however, plus their motors and batteries make them heavy and clunky when their electric-assist feature isn’t being used. That’s where the Ridekick ...well, where it kicks in. The motorized trailer quickly hooks onto an existing bicycle, pushing it to speeds of up to 19 mph (30.5 km/h), for a distance of about 12 miles (19 km) per charge. When you want your regular ol’ human-powered bike back, you just unhook it and go.
Read the full article: Ridekick provides an electric boost to regular bicycles