Shimano Ultegra Di2 ST-6770 STI Shifters

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Ultegra Di2 ST-6770 STI

When Shimano Dura-Ace DI2 was released, it set the world on fire. Electronic shifting now comes to the Ultegra group in the form of the 6770 STI shift/brake levers. With Di2, shifting is easier than ever before, and more precise too - imagi...

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