this is my actual conversion for a good friend. mx 20 directdrive 250 W, 36 V / 14 A controller in front bag, thumb throttle with on/off, pas-sensor, step-down 36 - 6 V, 36 V / 11,6 Ah LiMn, vmax 33 km/h - more pictures > http://commonman.de/wp/?page_id=3777