Originally Posted by
mattm
i think as long as you avoid tire-driven dynamos, you'll be OK.
Why is this mattm? I was considering this route as I will not need a dyno for nearly all of my riding. Seems like it would allow me to remove the unit easily when not in use. Then again I guess the dyno could be installed on a dedicated wheel. Plus when not needed the wheel dyno is disengaged from the wheel thus eliminating the drag.