Quote Originally Posted by Bad JuJu View Post
OK, I'm gonna show my ignorance here, but I'm dying to know--what's the deal with that hub? Why is it so fat--what's inside there?

Other than that, gorgeous bike, and I luvvvvvvvv those lights.
I didn't see this before! The hub is fat because it has a power generator inside it. When the wheel turns, power is generated and powers the headlights. So you can ride through the night without worrying about batteries, etc.

Fredwina's links pretty well answer the "what is a brevet" question.