Originally Posted by
EjustE
Here is a question for you: Will 77XX derailleurs work with ST-6400 STI levers? (Assume a 8sp cassette). Everywhere I read, I assume that this is the case, but have never actually seen that combination at work
Originally Posted by
jimbossa
On a side note,
the 74xx rd will work for some reason with 7700 brifters. My 8spd sti crapped out, and they are rarer and apparently more temperamental than 7700. So I bought a pair of 7700 shifters and they've been working great.
I think they look nicer as well.
E, Shimano changed the throw of the 77XX series shifters in 1997 to be the same as the older NON-Dura Ace throw i.e 105, rsx, 600 Ultegra so what we'd need to assume is that the 77XX derailleur throw is the same as the older NON-Dura Ace STI levers i.e. 105, RSX 600 Ultegra . I'm not an expert on this but the answer seems to be yes.
jinbossa, you got lucky and your situation is where alot of confusion comes from. If someone were to ask, "will a 77XX lever work with a 74XX deraileur?" the answer is a simple and firn NO!!. On occasion an odd combination will work, I'm sure someone has used Campy Synchros with a Shimano derailleur, Regina chain and Suntour Winner freehwheel and had it work.