Shimano Dura-Ace Di2 IRD-R9250 12 Speed Rear Derailleur

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  • Our fastest ever rear shifting
  • Integrated wireless unit, charger, and switch
  • LED status indicator
  • Wider range capacity

Product Description

Faster than ever before. The RD-R9250 model not only offers the fastest gear changes on the cassette to date and the largest gear ratio range of a Dura Ace rear derailleur, but can do much more. By integrating the Wireless system and charging port into one compact unit and thus covering a wide range of functions, it practically becomes the heart and brain of the entire Di2 assembly.

The built-in transmitter ensures wireless communication with the STI brake/shift levers ensuring podium-worthy, lightning-fast and precise shifting. Using Bluetooth and ANT+, it is also responsible for data transmission to the E-Tube Project and E-Tube Ride apps as well as to third-party devices.

Besides the charging port, the Top Normal rear derailleur features a button for certain Di2 settings and an LED for status display informing you about battery level, pairing and setting mode, for example.


  • Our fastest ever rear shifting, 58% faster than RD-R9150
  • Compact design includes an integrated wireless unit, charger, and switch
  • LED status indicator
  • Battery indicator
  • Pairing
  • Adjust mode, etc.
  • Wider range capacity
  • Max. low sprocket: 34T
  • CFRP rear derailleur plate

Product Specification

Brand Shimano
What's in the box 1 x Shimano Dura-Ace Di2 IRD-R9250 12 Speed Rear Derailleur
Material Aluminium, carbon fiber reinforced polymer (CFRP)
Technology Shadow RD+, E-Tube, Using Bluetooth and ANT+
Shimano Series Dura-Ace Di2
Product Series R9200
Speed 12 Speed
Total Capacity 37T
Max. Front Difference 16T
Top Sprocket - Max 11T
Top Sprocket - Min 11T
Low Sprocket - Max 34T
Low Sprocket - Min 30T
Pulley Teeth 11T
Direct Mount Mount_Direct attachment (Conventional), Top-normal spring type_SHIMANO SHADOW RD+
Genre Road
Weight 215 gr
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