Originally Posted by
robertorolfo
So it looks like all of the electric Citi Bikes have been pulled for safety reasons. Personally I wasn't surprised to read this, having seen more than a few of them in the wild, but these cited "brake issues" are baffling to me. Does anyone know any specifics? I assume that the brakes themselves are fine, and the issue is around the center of gravity for the bike design, but I really don't know.
You assume incorrectly. Details of the incompatibility of roller brake and front hub motor previously covered here:
https://www.bikeforums.net/northeast...tarted-30.html
In short, the roller brake is well (manual) and historically (all over the net) documented to require being paired with a hub with "power modulator" clutch capability to avoid excessive braking; but the chosen hub motor didn't have that manufacturer-required capability for use with a roller brake.