Bolt-On Electric Bike Kit from MIT
Technically, there are a lot of bolt-on kits to turn your reg’lar ol’ bicycle into an electric vehicle, but they usually involve bolting a whole lot of stuff on. Wires, batteries, a motor, a bigger chain to handle the motor power… by the time you’re done, you have a fugly bike-like object that needs the extra power just to haul the extra weight.
This item from MIT (ht: AutoBlogGreen) looks like it might finally solve that problem. I’m not sure I buy the 25 mile range from a battery pack small enough to fit into the wheel hub, but at a reasonable price it’d surely be worth a try!