Shimano CUES RD-U8050-11 Speed Rear Derailleur Advanced shifting on a budget The Shimano CUES system advances the world of budget-friendly components, making them last longer, with smoother operation, while offering the features riders need. This CUES RD-U8050 Di2 Rear Derailleur incorporates the advanced Shimano Di2 electronic shifting system into a drivetrain that won't break the bank, while running on the ultra-durable Shimano LINKGLIDE drivetrain system. The RD-U8050 features compatibility with LINKGLIDE 11-speed cassettes and chains, and even connects to BOSCH BSE3 via the PW-PS300 power supply wire (sold separately). The CUES RD-U8050 11-Speed Rear Derailleur is even compatible with 50-tooth LINKGLIDE cassettes, for a wide gear range and unbeatable durability. Features Di2 enabled for ultra-quick, precise electronic shifting, with customizability through the Shimano E-Tube Project app Compatible with LINKGLIDE 11-speed cassettes up to 50-toothe-Bike Optimized with compatible BOSCH BSE3 drive units via a PW-PS300 power supply cable (sold separately)SPECIFICATIONSLow Sprocket Max50-tooth Speeds11Chain Compatibility Linkglide 11-speed Average Weight N/A | Shimano | Cues Di2 Rd-U8050-11 Speed Rear Derailleur 11 Speed Derailleur