On Thu, 18 May 2017 14:38:12 -0500
Tim Wescott wrote:

On Thu, 18 May 2017 15:31:39 -0400, Leon Fisk wrote:

On Thu, 18 May 2017 13:10:48 -0500 Tim Wescott
wrote:

snip
[...]

Not cheap, but have you seen the NuVinci hub:

https://en.wikipedia.org/wiki/NuVinci

https://www.amazon.com/s/ie=UTF8&ind...=NuVinci%20hub

They're using it.


I use to keep up with the bicycling stuff, many years ago... Someone
started making a gearbox back then that mounted in the frame, above the
crank. Never heard anymore about it or saw one in the wild. This
might give you some more ideas:

https://en.wikipedia.org/wiki/Gearbox_bicycle

--
Leon Fisk
Grand Rapids MI/Zone 5b
Remove no.spam for email