An electric bicycle company out of Cambridge, Massachusetts is breaking into bike-sharing, one of the hottest new areas in tech and venture capital. To do it, Superpedestrian has raised $16.5 million in Series B funding from Spark Capital, General Capitalist, China Renaissance director Charles Kim, and Nest cofounder Tony Fadell. Currently, Superpedestrian makes a product it calls the Copenhagen Wheel. The $1500 wheel replaces a bicycle's back wheel, and has lots of electronics built in so that it helps you bike faster with less effort.