Utah Trikes - Shimano Alfine Mid-Drive Kit for Quad
I went on one of my mad trips thru the web. (started out looking for bike campers, ended up on coversion kits from recumbent trike to quad.
I found this tranny, theyre used on aerodynamic recumbants going for top speed with the hub version as well to get 81 gears. could be good for someone on a high budget looking for some massive gear range (towing, tandem , crazy trail to high gear for the road home).
put it with a NuVinci hub the mind boggles