Tested the XT Dyna-Sys Cassette 11-36T, XT Dyna-Sys RD SGS 773 and Ultegra 6600 shifters. It didn't work at all. The Dyna-Sys have a different pull ratio than road shifters. It only works with the XT MTB Dyna-Sys shifters. I will stick to my SRAM 11-32Tand XT 9spd RD772 set-up.