The RevoPower is a motorized wheel concept, the idea being the conversion of a pedal-powered bicycle into a motorcycle. It was invented by Denver, Colorado based RevoPower Inc. The RevoPower concept is a wheel with a two-stroke engine inside it which allows the bike to which it is attached to travel up to 20 miles per hour (32 km/h) at over 100 miles per US gallon (2.4 L/100 km; 120 mpg-imp). It is made to replace a standard 26-inch (660 mm) bicycle wheel, and to be able to run off a standard two-stroke mixture of gasoline and oil. According to the inventor, it was designed to be fuel efficient personal transportation for commuters, college students, and other specialty uses.