I think there's a mixup between two things here. A _freehub_ contains both the cassette body and the _freewheel_. The former has been invented in the 1930s and

I think there's a mixup between two things here. A _freehub_ contains both the cassette body and the _freewheel_. The former has been invented in the 1930s and popularized by Shimano in the late 1970s [1], the latter has been around since the 19th century [2]. [1] https://en.wikipedia.org/wiki/Freehub https://en.wikipedia.org/wiki/Freehub [2] https://en.wikipedia.org/wiki/Freewheel https://en.wikipedia.org/wiki/Freewheel