The Shimano Dura-Ace Di2 RD-R9250 12V rear derailleur is a high-end drivetrain component that has been designed to provide exceptional performance on road bikes.

This rear derailleur features a carbon fibre construction that makes it extremely lightweight and durable. In addition, it incorporates electronic technology that allows for precise and smooth shifting.

The R9250 also has fast and precise shifting capabilities, even under high stress loads, making it an excellent choice for professional cyclists and enthusiasts looking for the best in their cycling equipment.

Features:

• Use: Road
• Fastest rear derailleur ever, 58% faster than the RD-R9150
• Compact design includes an integrated wireless unit, charger and switch
• LED status indicator
• Battery indicator
• Mode setting
• Increased range capability
• Max. low sprocket: 34D
• CFRP shift plate
• Gears: 12