Originally Posted by
Winfried
For others' benefit: On a 2021 Brompton, the Litepro
B-series clamp didn't work with a
"9 Speed Front Derailleur Folding Bike Double Gear" LitePro derailleur, because on a double crankset, the fork sat too far outward and wouldn't reach the inner chainring. It might be because I turned a triple into a 46/30T double with the outer ring removed.
I had better luck with the
NC-100/Meijun/Mi.Xim clamp, but still had to install the derailleur a bit astray for the fork to reach the inner ring.
So, it's really a combination of a crankset, a clamp, and a derailleur. YMMV.
Thanks for the info. As to the chain going down to the inner ring. I modify the derailleur cages, in particular soldering a stainless strip to the outer plate of the cage, to push the chain in more convincingly when the cage moves inwards. The Mi.Xim clamp is the one I had problems with due to the vertical finger, on which the derailleur mounts, holding poorly with just one bolt. However, with two rings only on your bike, maybe the forces that the finger needs to withstand are still low enough for it to hold.