The RevoPower Wheel isa really cool new invention that makes your regular foot powered bicycle into aGas Powered Bicycle while letting you travel cheaply, efficiently, and easily.The RevoPower Wheel is simply a 25cc two-stroke gas-powered engine and gearswithin the front wheel of a bicycle. Revo says it can be installed on anybicycle by any person with very basic mechanical skills.All you have to do is select your bike (most bicycles with 26" wheels willwork), remove your old wheel, open your new wheel, and install your new wheel.Sounds pretty simple to me. Your just replacing it! Your new Gas Powered Bicyclecan now travel for 200 miles per gallon at a top speed of 20 mph. To start theengine simply start peddling while the wheel can be used manually or motorizedat any time