The Shimano Dura-Ace Di2 RD-R9250 12-Speed Rear Derailleur represents the pinnacle of electronic road shifting. Developed for WorldTour racing and engineered for uncompromising performance, the RD-R9250 delivers Shimano’s fastest, most precise rear shifting ever. Featuring a semi-wireless Di2 design, integrated wireless connectivity and intelligent system management, it provides lightning-fast gear changes under full load while maintaining the legendary reliability Dura-Ace is known for.

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Powered by Shimano’s revolutionary Di2 platform, the RD-R9250 communicates wirelessly with your shifters while maintaining a wired connection to the battery for maximum speed and reliability. Shifting is significantly faster than previous generations, allowing riders to change gears instantly during sprints, steep climbs and high-speed attacks. The derailleur also acts as the central communication hub for the entire Di2 system, enabling seamless integration with E-Tube PROJECT, cycling computers and Shimano’s Synchro Shift technology.

Designed to pair perfectly with the CS-R9200 12-speed cassette, the RD-R9250 delivers incredibly quiet operation, precise chain control and flawless shifting across the entire gear range.

Key Features

• Shimano Dura-Ace R9250 Di2 electronic rear derailleur
• 12-speed semi-wireless Di2 platform
• Shimano’s fastest and most precise rear shifting
• Integrated wireless unit for communication with Di2 shifters
• Wired connection to central battery for maximum reliability
• Compatible with Shimano HYPERGLIDE+ 12-speed cassettes
• Supports Synchro Shift and Semi-Synchro Shift
• Low-profile Shadow RD design improves protection and aerodynamics
• Supports up to a 34T largest sprocket
• E-Tube PROJECT compatible for firmware updates and customisation
• Approximate weight: 215g

Why Choose the Shimano Dura-Ace RD-R9250?

The RD-R9250 is the rear derailleur trusted by the world’s fastest riders. Professional reviewers consistently praise its near-instant shifting speed, exceptional accuracy and seamless wireless integration, making it one of the biggest performance upgrades in Shimano’s latest Dura-Ace groupset. Whether you’re racing, climbing or chasing every possible watt, the RD-R9250 delivers the confidence that every shift will be fast, silent and perfectly executed.

Combined with Shimano’s HYPERGLIDE+ drivetrain technology, the RD-R9250 maintains crisp, reliable shifts even under maximum pedalling load—allowing you to stay on the power when it matters most.

Shop the Shimano Dura-Ace Di2 RD-R9250 12-Speed Rear Derailleur at CCACHE and experience the fastest electronic shifting Shimano has ever produced, backed by fast Australia-wide shipping and expert support.