Shimano RD-6770 Ultegra Di2 Rear Derailleur Compatibility and Specifications

Shimano Ultegra Di2 RD-6770 Rear Derailleur 10 speed 2012 Series Model.

Like the Dura Ace series, the 6770 has a new design is compatible with wider range cog sets, accommodating up to a 27 tooth cog. The unit is 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.

*Prototype pictured
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.

Di2 - Digital Integrated Intelligence - electronic shifting
Programmed motion
Outer Plate: Aluminum/Anodized
Inner Plate: Aluminum/Anodized
Estimated weight 289 grams
10 speed compatible
Double Compatible

Note: DOES NOT works with 11-28 cassette.

Compatible ONLY with Shimano following parts: ST-6770, ST-7970, ST-7971, SW-7971, SW-7972

Compatible with Shimano 10 speed cassettes: CS-7900 (not 11/28), CS-7800, CS-6700, CS-6600, CS-5700, CS-5600. (does Not work with 11/28)

Compatible with Shimano Chains: CN-7900, CN-7901, CN-6700, CN-6701, CN-6600, CN-5700, CN-5701, CN-5600.

Require to be used with Shimano; SM-BTR1, EW-7970, Double setting SM-EW79F-E (with SC-7900) or SM-EW79A-E or Time Trial setting SM-EW-79F-I (with SC-7900) or SM-EW79A-I.