Originally Posted by
mechBgon
A Shimano FD-R443 should do it.
Isn't that a road FD? It is supposed to be used with SL-R440 shifters (which are road shifters for flat handlebars).
The Mountain FD-M770 front derailleur is rated by Shimano for both 44 and 48 big front chainrings (44-32-22 and 48-36-26).
On one bicycle I am using an Alivio FD-M413 mountain front derailleur with a 48-38-28 crankset.