the  options of the Dyna-Sys 10s drivetrain for the Deore XT lineup. Dyna-Sys does not deliver only 10s drivetrain to MTB, but also a dynamic power transfer and the newest system with optimized stability.
The Features of the Shimano XT 10 Speed Shadow Rear Mech RDM773 are:

* Dyna-Sys component Shadow Rear Derailleur Total capacity: 43T(SGS), 35T(GS)

* Guide pully: Sealed bearing

* Tension Pully: Sealed bearing

* Shifting Action Top Normal SHADOW

* Maximum Sprocket 36T

* Minimum Sprocket 11T