My main concern about the width is that I would need to take the entire traffic lane to tow something five feet wide. And while I think I would have the right to do this, I doubt if many motorists would agree. So I have never even started to solve the technical problems.

Gosh, it would sure be cool to tow a sailboat behind my bike! (Though I might be too exhausted to sail by the time I got my boat to the river!)

I think that I read that my boat weighs 310 pounds, and it is 14 feet long. I have no idea of what the trailer weighs.