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Home > Shop By Brand > Shimano > Shimano Di2 > Shimano Di2 Rear Derailleur

Shimano Di2 Rear Derailleur

Read out detailed Shimano Di2 Review - Large images and honest feedback.

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Fast, acurate and more powerful than any cable actuated system.

RD-7970 Dura-Ace Di2 Rear Derailleur like the 7900 mechanical derailleur, the 7970 has a new carbon fiber rear pulley cage and the new design is compatible with wider range cogsets, accommodating up to a 27 tooth cog.

The differences are the fact that the unit is now driven by a servo motor instead of a cable and spring, so shifts are identical and precise every time as the computer control unit analyzes each shift.

The derailleur has a built in mechanism that will allow the body to move inward under impact to reduce the potential for damage in the case of a crash. Cycling through the shifting a couple of times allows the shifter and rear derailleur to automatically re-synchronize.

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