>>2028537>>2028557I believe the latest hopium in this space is the patent shimano filed a few years ago showing a dual-cassette derailleur box with a very simplified shifting mechanism mounted at the BB like a gearbox. The twin cassettes means there’s no tensioner needed and the derailleur used is more like a 1960’s chain-pusher thing, simplifying things more than Hondas WC derailleurbox. There is still a final drive chain/belt to a single cog on the wheel, of course. Unfortunately, Shimano would make several billion more yen by focusing on a motor there instead, and pinion gearboxes are popping up everywhere these days anyways, I don’t expect much from the space of derailleur in a box
