Originally Posted by
Jeff Wills
Incorrect. The road "flat bar" front derailleurs use the same cable pull as the "mountain" front derailleurs. I have two bikes in my garage- one mine, one my wife's- that use identical derailleur setups. Hers has Deore LX shifter pods, mine has R440 pods. The operation is identical.
That's news to me, but good to know.
The special front derailer for flat-bar road use is, I guess then, essentially an MTB derailer but with a road-style cage for bigger rings(?).
It makes sense from the standpoint of the mtb shifters having perhaps a different spool diameter and/or lever throw than road-STI shifters.
I had recalled once not being able to get MTB shifters to work with a road crankset, but maybe it was an XC-Pro derailer that I was using. It wouldn't index right.
Why then does Shimano offer a dedicated shifter R440/443 instead of using the Deore shifter?