Short Cage Rear Deraileur (10 speed)

Short Cage Rear Deraileur (10 speed)

Ultegra RD-6770-SS

This RD-6770 rear derailleur is a 10-speed rear derailleur and as such it isn't really used anymore. All current and previous Di2 generations have moved on to 11-speed and 12-speed.

Its low sprocket max is 28T and the top sprocket min is 11T. The max supported front difference is 16T and its total capacity is 33T.

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