Originally Posted by
ColonelJLloyd
These are very cool, but I don't understand why they call them "bottom bracket dynamos". They're not directly powered by the turning of the axle at the bottom bracket. Why aren't they just called "rear tire (or wheel) dynamos"?
That is exactly what I was thinking before I went to the provided link to Peter White Cycles as well. I thought it was the Gruber Assist design, but than the rider providing the power.
I also think that it is possibly better to have it touching the rear tire on the side to pickup less dirt and stuff.