Originally Posted by
dr_lha
Falcon is a company that makes cheap knock-offs of old Shimano derailleur designs.
Those SRAM 3.0 Comp twist shifters have a 1:1 actuation, which means SRAM derailleurs are needed to go with them. They won't work with Shimano derailleurs. The Shimano compatible versions say "MRX" on them (I have some in my parts bin).
EDIT: OK, I guess it doesn't matter for front derailleurs, where the cable pull for Shimano and SRAM are similar. You can't drive a Shimano rear derailleur with those shifters though. So that Falcon FD is probably just in need of service.
Well, the shifter doesn't seem to pull the derailler quite enough, if you see what I mean? I can adjust it so that it'll do rings one and two but not three or I can get it to do two and three but not one. It won't do all three, however.
I realise all the shifters/deralieurs are bottom of the range but the falcon one just appears to be a lot cheaper made than the others, if you see what I mean, so suspect it's a replacement. I'm not 100% convinced it has ever worked properly.