Yes, your bike runs on magic. Yes, its machinations are entirely unknowable. Alright, we're exaggerating, but bicycles can feel that way to a lot of people—even die-hard cycle commuters who mount up ...

When you were first learning how to ride a bike as a kid, the bike you were learning on probably didn't have any special bells or whistles on it, aside from perhaps a literal bell on the handlebars.