I remember riding an electric bike years and years ago. My father was working for a car dealership and for some reason they had a few of them. We rode them in a parade that was about ten miles start to finish, and well the bikes only ran electrically for about two of those miles. I'm sure in the past twenty years or so they've improved the battery life, but I would definitely suggest whether kit or purchased in total, that you look at the battery life for the bike.