Shimano used to state that the max cog size for either Ultegra was 27t. They now state 28t, IFIRC. This may be because they now make Ultegra level 11-28 cassettes. Either Ultegra model will comfortably manage a 30t cog - that's the reason that Sheldon introduced the Harris custom Century Special cassettes in 13-30 and 12-30. They play nicely together. Some have gotten them to work with 32t cogs by reversing the "B" adjustment screw and the like, but the setup can be a bit finicky.
I'm happily running an Ultegra GS (medium cage) on my Atlantis with a 13-30 Century Special and a 20-33-46 triple. http://harriscyclery.net/product/harris-custom-century-special-13-30-9-speed-cassette-702.htm Elton Pope-Lance Natick, MA On Nov 5, 2011, at 3:24 PM, Jim Thill - Hiawatha Cyclery wrote: > If I'm not mistaken, max cog size (27t) is the same on both Ultegra > derailleurs, but the longer cage version makes it work with a triple. > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/rbw-owners-bunch/-/X1XbWHXMXmMJ. > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > To unsubscribe from this group, send email to > rbw-owners-bunch+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rbw-owners-bunch?hl=en. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
