
Shimano Ultegra Di2 RD R8050
* Shimano Shadow RD construction* Low-profile rear derailleur design, less likely to be damaged in a crash* Shimano Synchronised Shift technology and system communication with the front derailleur* SS: compatible with 11-25 to 11-30 cassettes* GS: compatible with 11-28 to 11-34 cassettes* Weight: 242g (SS), 249g (GS)







