Ultegra SL shifters work with 7900 RD?

[jojoma]

I think the answer is yes, but will my Ultegra SL 10-speed shifters work with a DA 7900 rear derailleur? I have a 12-27 7900 cassette.

 

[jojoma]

Yikes. I was just reading that the 7900 shifters have different "pull ratios," so they may not be compatible.

 

[tafi]

The FRONT derailleur is different, the rear derailleur has the same "pull-ratio" as before. The cassette should not matter.

Enjoy