Shimano RD-6770 Ultegra Di2 10-speed SS Rear Derailleur The Shimano RD-6770 Ultegra Di2 10-speed Rear Derailleur E-tube, SS cage is, as with all Shimano components, reliable, durable and designed featuring the utmost attention to detail. Compatible with Di2 electronic shifting, this rear derailleur is precise, honed and direct in providing...
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