Find your Shimano components for electronic drivetrains at Escapa .
The Shimano Ultegra 12-speed Di2 RD-R Rear Derailleur offers ultra-fast yet precise shifting. Even under medium and high loads, thanks to its low-profile design and Shimano Shadow+ technology, shifts are fast and virtually silent. There are no clunks or loud rattles with these high-tech components! Despite its compact size, theShimano Ultegra 12-speed Di2 RD-R rear derailleur houses the battery charging port and the wireless mode button. With just one cage length, the rear derailleur shifts cassettes ranging from 11-30 teeth to 11-34 teeth, thereby increasing the versatility of the Japanese manufacturer’s top-tier groupset.
Technical specifications:
Material: aluminum
Version: 12-speed
Compatibility: Shimano Ultegra ST-R8150, ST-R8170 shift levers
Total capacity: 39 teeth
Max. front range: 16 teeth (difference between the smallest and largest chainrings)
Max. rear sprocket: 34 teeth
Min. largest sprocket: 28 teeth
Max. smallest sprocket: 11 teeth.
Min. smallest sprocket: 11 teeth
Mounting: direct mount
Color: gray
Manufacturer's weight: 262g
Includes: 1x rear derailleur
