Shimano Dura-Ace Di2 RD-R9250 Rear Derailleur IRDR9250F 23GK100A047

Shimano DURA-ACE Di2 RD-R9250 12-Speed ​​Rear Derailleur

The science of speed: the pinnacle of professional racing performance.
The DURA-ACE R9200 , Shimano's top-of-the-line road groupset, is the fastest and most advanced groupset the brand has ever produced.
The new generation RD-R9250 Di2 rear derailleur combines the charging port and wireless system module in a single compact design.
Result: perfect gear shifting, ultra-fast response time, and minimal weight.

This model is compatible with all cassettes from 11-28T to 11-34T with a single cage length — delivering flawless performance whether racing, triathlon, or climbing.

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⚙️ Key Features

• 12-speed Di2 electronic system – Shimano's fastest wireless protocol.

• Full customization with E-Tube Project (gear speed, synchronization modes, key assignments)

• SHIMANO SHADOW RD technology – low profile, quiet operation and impact protection.

• Aluminum + CFRP (carbon fiber reinforced plastic) construction – the perfect balance of lightness and durability.

• Direct Mount system

• Di2 wireless chip and charging port integrated.

• Compatible with E-Tube EW-SD300 cable

• Completely silent, vibration-free gear changes with millisecond response times.

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🧠 Shimano's Wireless Speed ​​Technology

The new generation DURA-ACE Di2 R9250 uses Shimano's proprietary low-latency wireless system.
This system:

• It makes gear changes 58% faster .

• Thanks to uninterrupted data transfer, reliability is not compromised.

• It maintains the stability of the electronic system, ensuring performance that meets professional racing standards.

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🔧 Technical Specifications

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⚙️ Technologies

🔩 Shimano Shadow RD

Thanks to its low-profile body design, it is quieter, better protected, and more durable.
It reduces the risk of collision and increases chain stability during gear changes. It prevents chain slapping or noise, especially during aggressive riding.

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⚡ SEIS (Shimano Electronic Intelligent System)

Unlike wired mechanical systems, the SEIS electronic gear shifting system transmits signals electronically .
Advantages:

• Flawless gear shifting even in cold, muddy or wet conditions.

• Cables that never stretch or get dirty.

• Switching at millisecond speed with the touch of a button.

• Full control without changing hand position.

• Flawless gear changes even when tired.

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🔌 E-Tube Platform

Shimano's E-Tube ecosystem enables all electronic components on a bicycle to communicate via a "plug & play" connection system.

• Easy installation, stainless steel connectors.

• Always get the latest version with software updates.

• Customizable settings via the e-Tube Project application.

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🏁 THE SCIENCE OF SPEED

Developed by Shimano engineers, the DURA-ACE R9200 series was designed from the ground up to save time in professional races.
With every millimeter optimized, the RD-R9250 represents perfection in the balance of speed, weight, and accuracy .

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📦 Box Contents

• 1 x Shimano DURA-ACE Di2 RD-R9250 12-Speed ​​Rear Derailleur

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🔢 Additional Information

• Product Code: IRDR9250F

• EAN: 4550170240950

• UPC: 192790240954

• Manufacturer: Shimano Inc. (Osaka, Japan)

• EU Representative: Shimano Europe BV – Eindhoven, Netherlands

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🏆 Result: Professional Racing Standard Electronic Precision

Shimano DURA-ACE Di2 RD-R9250,

• Gear changes at millisecond speeds ,

• maximum power transfer
  And

• wireless integration
  It defines the future of performance driving.

DURA-ACE Di2 R9250 – Designed to win.

Shimano DURA-ACE Di2 R9250