and only if you don't mix and match road front derailleur and mtb rear
That's exactly what's going on with that Panasonic. But as explained in the comments, it doesn't work.
They could've just trimmed a mtb one and have a working bike. That's a bit shit actually.
@Thrust started
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That's exactly what's going on with that Panasonic. But as explained in the comments, it doesn't work.