SHIMANO DURA-ACE Di2 R9150 2x11V Short Cage Rear Derailleur

A key element of the new vintage of the Japanese brand's top-of-the-range groupset, the SHIMANO Dura Ace Di2 9150 rear derailleur rear derailleur has been completely redesigned compared to the previous model.

The main new feature is the Shadow concept, well known to mountain bikers, which guarantees superior strength, particularly in the event of a fall, by placing most of the body under the cassette. The clever, streamlined design also guarantees stable, efficient and effortless shifting, and can handle a range of cassettes from 11 to 30 dts.

What's more, this derailleur features Synchronized Shift technology, which improves shifting efficiency as you ride. Thanks to this system, you can control both front and rear derailleurs with a single shifter. The front derailleur detects the position of the rear derailleur and automatically shifts to the most efficient gear for the best chain line, so you never have to worry about front shifting or corrective changes again. 

An incredibly lightweight, high-performance derailleur that shifts as smoothly as it shifts fast, delighting the most demanding racers who simply want the best.
 

Ref: 7970332115110