mid-drive tandem
Can I add a mid-drive (Bafang?) to a Co-Motion tandem? The "boob tube" seems to get in the way of putting one in the stoker's position (nearest to cassette). Can I put it in the captain's bottom bracket?
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Bike-specific Questions!
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On the old (yellow) columbia tandem video, can anyone work out what gearing he has in place? I know he says 28T front chainring (on the bafang) , but any other insights around the stoker chainring size and rear cog size? I have an old surrey bike I refurbished and have added a CYC motor to the front driver's side, but that's all connected to the original non-PAS gearing: 36T front, 36T second row, and 28T cog (attached to a 7 speed nexus). I'm scratching my head over how an e-PAS gearing setup should be? Looks like he has a much smaller rear cog (maybe 14t?) and maybe a 40+ toothed stoker chainring, on top of the 28T front ring. Any ideas on what they actually are though?