Do front derailleurs come in different flavors ie. 2 speed and 3 speed? How can I tell if I have a 2 or a 3? I just installed a triple crank on my bike and have the Taigra 4500 triple front but I can't get my old derailleur to function properly with it. The derailleur I'm using is an old part, from the original build which was a double front. I had no problems keeping the rear derailleur and stepping it up from a 7 to a 9 speed. Will I need to purchase a new front derailleur?