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Step up to Ultegra DI2 and prepare to be amazed. True electric shifting has arrived to the Ultegra-level group and it's everything we hoped for. Easy shifting at the touch of a finder, accurate, and effortless. This rear derailleur handles a maximum cog of up to 28T to accomodate your wide-range gearing needs.
Please Note: All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions. To update the firmware on your components, use the Di2 system checker from Shimano by clicking here.
Reviewed by 1 customer
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Comments about Shimano Ultegra DI2 RD-6770 R Derailleur:
Very smooth, consistent shifting in all weather conditions. Current model is kinda clunky looking but works perfectly every time.