This thing is too cool. It improves the efficiency of multiple aspects of ANY car you put it on, never goes flat, and fits on any car. http://www.energyreturnwheel.com/videoplayer/video/VideoPlayer.html Select the video that says ERW_Animation in the top right to get a good video on how this wheel works. The only problem is, corporations are not going to be interested in this idea because it has poor profit margins. This is the kind of wheel you only need to sell once every decade (if that), this is not good for big business. Hopefully though we start seeing these on the road soon.