Shimano Ultegra Di2 Shadow E-Tube DM Rear Derailleur 12s & 34t Black

With Our Fastest, Most Accurate Shifting, The New 12-Speed Ultegra R8150 Rear Derailleur Is More Versatile Than Ever Thanks To A Single Cage Length Option That Is Compatible With 28-34t Low Sprockets.

Features:

– Fastest Ever Rear Shifting, 58% Faster Than Rd-R9150
– Compact Design Includes An Integrated Wireless Unit, Charger, And Switch
– Led Status Indicator
– Battery Indicator
– Pairing
– Adjust Mode, Etc
– Wider Range Capacity
– Max. Low Sprocket: 34t

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