Originally Posted by
Jipe
The L-twoo Fold-B is the only derailleur able to keep the chain tensionned when folding the rear triangle.
The type of chain tensionning with an extension arm added to the derailleur cage of the Takachia was used on the Birdy 1 and Birdy 2 (mounted at factory by both Riese & Müller and Pacific Cycles and also several different design from several third party components manufacturers like for instance Ridea) and has never been 100% reliable = without derailling sometimes when unfolding the bike.
It would be better to keep the L-twoo Fold-B derailleur.
tanks! That’s good to know. So far, I’ve had no issues folding or unfolding either bike - but was not aware the L-twoo was the most reliable. Do you know if it can take a larger cassette? I’d like to get at least a 42t sprocket on there. I imagine the extension arm on the Takachia could work with a different derailleur, like a Shimano Zee maybe?