A lot of the Shimano triple stuff that I've seen ends in a 3 or 4. If you look in the inner side of the FD, it should be have a number on it. FD-4503 maybe? I have a 105 triple FD in my hand it it is stamped FD-5504. I also just swapped an Ultegra 6600 double FD that was stamped FD-6600 for an Ultegra 6700 double FD that was stamped FD-6700.


Bob