Shimano Ultegra Di2 RD-RX805 Rear Derailleur

Its clutch system improves shifting and reduces noise from chain slap, and there's compatibility with both 1x and 2x drivetrains and Shimano Di2 shifters. Experience smooth Di2 electronic shifting, a quiet ride and a good time.
-Ultegra Di2 rear derailleur designed for rough roads and gravel
-Clutch system improves shifting and silences chain slap
-Compatibility with both 1x and 2x drivetrains and Shimano Di2 shifters
-Durable alloy construction will give you years of on- or off-road use
-Long cage handles up to a 34t sprocket
-Di2 electronic shifting is precise and can be customized
-Low-profile Shadow design helps avoid damage from impacts
-Item #SHI00KT