Did you ever wanted to know what's inside a speed-drive?

Did you ever wanted to know what’s inside a Schlumpf gearing system?

Or you may have apprentices / students eager to learn about the latest innovations in bicycle technique?

Now Schlumpf Innovations have their edu-package available, that consists of a Schlumpf cut-away-model of a speed-drive, that shows all internals till the last screw.

With full function, shiftable, rotatable.