Lightfoot Cycles makes a great 24 volt 500 watt electric recumbent. You can have the electric assist put on any of their models. It uses the eight gears on the back wheel. It has a mid cassette that gives the bike a total of 192 gears for the pedals. Also they make a recument the Smoothie that is built just for the bionx conversion. It is designed so the battery fits right infront and under you. Really looks neat. I had them make me a Ranger with a Subaru 1.6 hp engine under the seat. That is a great idea for those of you that want to cover some long distance travel in a short amoung of time.