SHIMANO DURA-ACE DI2 R9250 12-Speed Rear Derailleur

The SHIMANO DURA-ACE DI2 R9250 12-Speed Rear Derailleur, the benchmark component in the World Tour peloton, offers the fastest gear changes ever seen across a gear range never seen before.

This derailleur now adopts the Shadow RD concept well known to mountain bikers, which guarantees far superior robustness — particularly in the event of a crash — by placing the majority of the body beneath the cassette. Its clever, clean design also guarantees stable, efficient and effortless gear changes, and can handle a cassette range of 11 to 34 teeth.

Furthermore, this derailleur benefits from Synchronized Shift technology, which improves shifting efficiency while you ride. Thanks to this system, it is possible to control both derailleurs (front and rear) using a single gear lever. The front derailleur detects the position of the rear derailleur and automatically shifts to the most efficient gear for the best chainline: you therefore never have to worry about front shifting or corrective changes.

An incredibly light and high-performing Shimano Dura-Ace Di2 R9250 derailleur delivering gear changes that are as smooth as they are fast, sure to delight the most demanding competitors simply looking for the very best.

Manufacturer's Manual

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