Originally Posted by
rccardr
All true.
However, people have reported that they have successfully used both a mid cage and long cage Ultegra RD with an 11/32 cassette. Mid cage may require installation of a longer B screw (or removing it and reinstalling from the hanger side to get more length), long cage seems to handle it just fine.
Hope they are correct, as I'm planning to use a 6600 long cage RD with an 11/32 combo on my century build.
The capability for using a 32t cog with any Ultegra derailleur has more to do with the length of the derailleur hanger than the length of the cage.