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Merlin Cycles£599.00Visit shop Shimano Black Dura-Ace R9250 Di2 Rear Derailleur - 12 Speed - / 12 Speed
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The Shimano Dura-Ace R9250 Di2 Rear Derailleur is designed for professional cyclists and competitive enthusiasts who demand the pinnacle of precision and speed in their 12-speed drivetrain. It offers a remarkable 58% faster shifting performance than its predecessor, providing instantaneous gear changes and a streamlined, integrated design; however, it requires a fully compatible 12-speed Di2 ecosystem to function, making it unsuitable for older 11-speed setups.
| Model Part Number | RDR9250 |
|---|---|
| Brand | Shimano |
No, the R9250 is exclusively designed for Shimano 12-speed road drivetrains.
No, the wireless connectivity module is integrated directly into the R9250 derailleur.
The R9250 is compatible with low sprockets ranging from 28T to 34T.
The charging port is conveniently located on the body of the R9250, allowing you to charge the battery through the derailleur.
The integrated LED indicator will blink in a specific pattern to indicate that it is actively searching for a connection.
Check the battery charge level via the LED indicator and ensure all E-Tube wire connections are fully seated.
Toggle the Bluetooth/ANT+ pairing mode on the derailleur by pressing the button until the LED flashes accordingly.
Check for debris in the derailleur cage or cassette, and verify that the hanger alignment is straight.
Installation requires standard knowledge of Di2 component integration. Since the charging port and wireless module are built into the R9250, ensure your frame is routed correctly for the Di2 wire connecting the derailleur to the battery. To pair the unit, use the LED indicator to enter pairing mode and sync through the E-TUBE Project app. For maintenance, keep the jockey wheels clean and free of debris, and perform regular firmware updates through the official app to ensure peak performance. Avoid using harsh degreasers that can penetrate the sealed electronic housing.
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