Is the Sram RED Yaw FD compatible with Dura-Ace 7800 shifters and 7900 compact crank?
I have had problems with my 7800 FD ever since I added a 7900 compact crank, it was supposed to be compatible but it has been a dropped chain nightmare.
From what I can tell the 9000 FD is not compatible?
7800 fd with 7800 shifters is not compatible with 7900 cranks. in general, the derailleur wont move far enough to get the chain to the large ring. there will be rubbing in the hardest gears in the big ring and/or in the easiest gears in the small ring.
this chart does not list 7800, but does still list 5600 (105). it shows that 5600 is compatible with 7900 front derailleurs (but not the other way around) and 5600 is compatible with 7901 chains. that's basically the extent of cross compatibility for the front shift systems.
Yes the 7800 FD and 7900 compact crank don't work well together that is why I am looking to replace the FD. I think a 7900 FD and 7800 shifters will work? The new 9000 FD might be better and also work?
I am using a 7900 chain so that is not a issue.