Senior Member
Join Date: Dec 2005
Location: Boulder, Colorado
Posts: 1,383
Bikes: Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
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Any long cage RD will work. I helped a friend get a 11-32t cassette mounted on his road wheel using an older 105 group LC RD. I didn't know that Ultegra made a LC RD (90mm spacing). The only Ultegra RD I have seen were medium cage (75mm spacing). That is why the XT RD is recommended for using with the MTB cassette. My friend just happened to have an old 105 LC RD so we used that one. Take out a mm tape and measure the distance between the jockey wheel spacing center to center to determine the cage type.
I have a touring wheel that I have an 11-34t cassette and Shimano type hub body (after market) on a campy Centaur hub and am using a Centaur LC RD with 10spd campy Ergos. Works fine. The campy 10spd and shimano 9spd cassettes have relatively close spacing and work well together.