Think of the German-designed Flyrad as a cross between a unicycle and Segway. It’s powered by a “500W electric motor and a 36V battery; the thing is good for about 31 miles per charge at 25 mph.” More information (German) Video after the break. Click here for more pictures.
A kid’s version and a version for teens is also available. If you are really into speed, you can opt for a 1000W motor and bigger battery for more power.