I have the Di2 Dura -Ace set up on my...
I have the Di2 Dura -Ace set up on my Cervello using the FD-7970 front derailleur. I wanted to change my rear cassette to a 12-27. Do I need to change the derailleur or will it work without any adjustmants just changing the rear sprocket? Thanks
Just found out that it was the rear derailleur RD-7970 that is the factor and apparently it will work with the 12-27...So thanks anyhow.