I heard back from IRD about this, and here's what they say:
"The F has not been made for at lest 6 years and was designed for the
shifter pull ratio that upright style (shimano mtn) shifter had. The
Alpina D was a triple designed around the shimano road pull ratios.
The current model of the
But that's not what IRD says. The copy on the website refers to types of
shifters, not type of bar or bike. As I said they reference that the fd is
designed to index with Shimano STI brifters and possibly Campy Ergo,
systems that are dependent on the derailleur working exactly right with
those
Assumptions based on bar type sure are foggy. Drop bars can be mounted on
almost anything and not limiting of shifters, thumbs have been mounted up
on the flats and Genevalle puts them on brake levers.
I suspect IRD's differentiation is about bottom bracket width and "drop
bar" being equated
On my recently sold Atlantis, I use to run a Sugino Triple with an IRD
Alpina-d front derailleur and MicroShift SL-T09 Thumb Shifters (in friction
mode) on Albatross bars. Worked great.
Jan
San Francisco, CA
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I did some searching on this and what I see is IRD says it's optimized for
Shimano STI road shifters and can work with Campy Ergo, too. The "dropbar"
nomenclature is a bit deceiving, it's the shifters most folks use on drops
they're concerned with because the derailleur has to work with front
