Product Condition The XTR Di2 RD-M9050 Rear Derailleur is in Excellent condition The Shimano XTR Di2 M9050 Rear Derailleur - GS is in Excellent condition The derailleur was previously owned for approximately 4 weeks The following observation has been made about this item The derailleur is very clean The derailleur appears to have been installed and used very briefly if at all The pulleys appear to have seen little use Item sold as is All warranties voidSize Unisex Medium CageColor BlackRetail Cost 71999On top of delivering smooth effortless shifting in all conditions Shimanos XTR Di2 RD-M9050 Rear Derailleur will make the aft-end of your drivetrain smarter than its ever been before With Shimanos Synchronized Shift technology the front and rear derailleurs operate in sync and have the ability to calculate your efficiency thus the M9050 can automatically shuttle your chain from cog to cog to set you up with the best chain line for any given situation This technology also protects the short cage derailleur by making sure you never run out of chain when cross-gearing Moreover Shimanos E-Tube system allows you to program your preferences beforehand so your drivetrain is calibrated just the way you like it Of course Synchronized Shift can be easily turned on and off as you please The XTR Di2 RD-M9050 Rear Derailleur is compatible with Shimanos resilient and hassle-free E-Tube wiring system XTR Di2 RD-M9050 Rear Derailleur DWGAD78