I just built a 48v 1200w geared hub kit. it will do 27mph and the kit was 229.00. That's tax and shipping with a LCD display. and a 48v 12ah battery for 205.98 free shipping. already had the 700c bike. So the total cost was 434.98. and maybe 75 for wire and connectors. had some wood laying around, here is what I did with the kit.