Just a thought. Am wondering if electric hub motors have some kind of voltage regulator on them so that they can't go over 20 MPH? Possibly to meet the import regulations? If so, couldn't a person change something to maybe bypass this and get a little more speed ouit of a hub motor without frying it? I have a 48V hub motor on my bike and can get a max speed of 18 MPH. Would sure like to be able to squeeze a few more MPH out of it. Just a thought.