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The idea was to address a shortcoming of derailer drivetrains, in order to maximise their unmatched efficiency.
If efficiency (and weight, for that matter) wasn't a prime consideration, if it was only just about maintaining a nice cadence, the project would've been modifying some Ergolevers to shift a NuVinci.
Kimmo
🅑🅐🅣🅣
Isn't that kind of what Pinions do ?