... better DIY Electric bicycle conversion kits Gear motor with 9 spockets 12-28''wheel,150-350w CCC,CE,ROHS, ... DISK BREAK ADAPTER)150w-350w12"-28"700C16KGFOR USA MARKETBATTERYMOTOR WHEEL 24v-10AH LIMNFRONT direct motor 100MM200-350w12"-28"700C15KG24v ... 700C7-10KG48v KIT 7-1OKG Electric system MotorFront wheel,light,high speed,brushlessGreat hub motor,16inch28inch wheel optional.DISC brake optionalRear ...