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SHIMANO 105 Di2 RD-R7150 Rear Derailleur 2x12-speed
Compact design includes an integrated wireless unit, charger, switch LED status indicator Battery indicator Pairing Adjust mode, etc.
Wider range capacity Max. low sprocket: 36T
Shimano Alfine CT-S500 Chain Tensioner
Allows the use of an internally geared hub on a frame with vertical drop-outs.
Chain Tensioner
20 tooth max rear sprocket
16 tooth chainwrap capacity
41.8mm chainline
Uses washers on on the mounting bolt for 5mm of chainline adjustability
Compatible chain - 3/32"
Shimano Deore XT Di2 RD-M8050-GS Rear Derailleur Sought after Shimano Di2 system for MTB riders and is even more affordable price tag. Shifting motor responds instantly to rider input E-Tube electric wire transmission guarantees consistent performance in all conditions Accurate chain position in every gear Programmable, multi-shift and Shimano Synchronized...