I'm looking for the absolute maximum possible gear ranges from the known/possible triple-geared drivetrains, such as the strategy noted on TrikeTech.com. This involves pairing each of the three known dual hubs, SRAM DD3, Classified Powershift, and the Sturmey Archer CS-RK3 with a traditional front crankset and derailleur.
So yeah, we're looking at a bike with three shift levers that's hungry for steep pavement.
(Internal cranks could and should also be considered for this general question, but I'm working with a standard bottom bracket shell, so that's the initial priority of my question. And IDK if there's an internal crank that can expand the possibilities further with a standard BB shell.)
I will be doing the math myself also later on, but I'm posting this question for others, as there will be some unknowns I wont be able to consider. I want accuracy and comprehensive considerations given to how someone could go about maximizing gear range with the triple-geared strategy.
I'm not an expert here. I'm assuming a triple crank would be best in this combination, but I don't know things like whether 11 speed cassettes might give some advantage here, or if there are ultra-long derailleur cages I might not know about.
In a later question I'll ask more broadly about any other strategies that might result in even greater range.
Ultimately I'm looking for massive range so I can climb and descend extremely steep grades over exceptional distances on the same bike, on pavement.
What would be super awesome is if responders could keep their answers updated if they happen to come across something to improve their strategies.
Anyhow, I feel like this is a fun question, and someone might enjoy answering. If your answer gets selected as my solution, you may see it built onto a Montague Fit 700c folding bike. LOL, my taste is eccentric, and I have a very specific adventure style for this bike.