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

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

Digital Integrated Intelligence or Di2: with programmed automatic motion at the touch of a switch ...

Best current price£439.00from Team Cycles

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Shimano Unisex Black Rd-R9250 Dura-Ace Di2 12 Speed Rear Derailleur

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4 offers from £439.00 - £699.99

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Team CyclesShimano Unisex Black Rd-R9250 Dura-Ace Di2 12 Speed Rear Derailleur
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£439.00
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Condor CyclesShimano Light Dura-Ace Rd-R9250 Di2 12-Speed E-Tube Rear Derailleur
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£699.99
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Leisure Lakes BikesShimano Dura-Ace RD-R9250 Di2 12-Speed Derailleur Black
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£699.99
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Product Information

Full details

This guide is for cyclists seeking the pinnacle of electronic shifting performance. The Shimano Dura-Ace RD-R9250 Di2 Rear Derailleur offers unparalleled drivetrain efficiency through its programmed automatic motion and intelligent gear selection, but requires a compatible Di2 system for full functionality.

All features

Model Part NumberRDR9250
BrandSHIMANO

Extended Product Information

FAQs

How do I charge the Di2 battery with this derailleur?

Connect the Shimano dedicated charger to the charging port located on the rear derailleur itself, and plug the charger into a power source.

What is Synchronized Shift?

Synchronized Shift is a feature that automatically selects the next gear ratio on the cassette, either up or down, based on your front derailleur shift or the gear you are currently in, simplifying gear management.

Do I need a separate handlebar junction box with this derailleur?

No, the RD-R9250 rear derailleur acts as the central unit and replaces the need for a traditional handlebar junction box for basic Di2 system functions and charging.

Can I connect this derailleur to my Garmin or Wahoo device?

Yes, the derailleur features ANT+ connectivity, allowing it to broadcast system information to compatible head units like Garmin or Wahoo devices.

Is this derailleur compatible with older 11-speed Di2 systems?

No, the RD-R9250 is specifically designed for the 12-speed Dura-Ace R9200 Di2 system and is not backward compatible with 11-speed systems.

How do I update the firmware on the derailleur?

Firmware updates are performed using the Shimano E-Tube Project software, either the PC version or the mobile app, connected to your Di2 system.

Troubleshooting

Derailleur is not shifting or shifting erratically.

Check Di2 battery charge level. Ensure all E-Tube connections are secure and undamaged. Verify system firmware is up-to-date using E-Tube Project. Perform a system reset through the E-Tube software.

Wireless connection to shifters is lost.

Ensure shifters have fresh batteries. Re-pair the shifters with the rear derailleur via the E-Tube Project software. Check for potential interference from other wireless devices.

Synchronized Shift is not functioning as expected.

Verify the Synchronized Shift mode is enabled in the E-Tube Project software. Ensure the shift mapping is configured correctly for your preferred gear combinations.

LED indicator shows a red light.

This typically indicates a low battery. Charge the Di2 battery immediately using the charging port on the derailleur.

Poor performance after exposure to water or dirt.

Clean the derailleur thoroughly with a damp cloth. Ensure no debris is obstructing the derailleur's movement or the wiring ports. Avoid submerging the derailleur.

Pros and Cons

Pros

  • Extremely quick, smooth, and effortless shifting.
  • Intelligent gear selection reduces rider cognitive load.
  • Wireless connectivity simplifies installation and maintenance.
  • Integrated charging and ANT+ provide system convenience.
  • Replaces the need for a handlebar junction box, cleaning up the cockpit.

Cons

  • Requires a complete compatible Di2 system for operation.
  • Higher cost associated with Dura-Ace components.
  • Reliance on electronic systems means potential for software or battery-related issues.
  • Initial setup and programming may require a learning curve for some users.

Setup, Compatibility & Care

Setup:

  1. Ensure all Di2 components (shifters, derailleurs, battery, and wiring/wireless units) are compatible.
  2. Connect the rear derailleur to the rest of the Di2 system using the provided E-Tube wires or via wireless pairing.
  3. Charge the Di2 battery fully using the charging port on the rear derailleur.
  4. Use the Shimano E-Tube Project software (via PC or mobile app) to configure shift settings, button functions, and Synchronized Shift modes.

Compatibility:

  • Requires Shimano Dura-Ace R9200 Di2 shifters and other Di2 components.
  • Compatible with 12-speed drivetrains.
  • Utilizes ANT+ for connection to compatible head units and power meters.

Care:

  • Keep the derailleur clean. Wipe down with a damp cloth after rides, especially in wet or dirty conditions. Avoid high-pressure washers.
  • Periodically check the E-Tube wires for any signs of damage.
  • Ensure the Di2 battery is kept charged; a low battery can lead to shifting issues.
  • Refer to the E-Tube Project software for firmware updates to ensure optimal performance.

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