Shimano Dura-Ace RD-R9250 Di2 Rear Derailleur

Shimano’s flagship 9200-series Dura-Ace groupset is further refined for faster, smoother, and more precise performance. The RD-R9250 rear derailleur supports cassette ranges up to 11-34T and delivers significantly faster shifting compared to the previous 9150-generation system.

The derailleur features a compact, aerodynamic design with an integrated wireless communication unit for seamless shifting response. It is part of Shimano’s updated Di2 architecture, which combines wireless shifting at the cockpit with an internally managed electronic system powered by a shared Di2 battery.

Shimano claims a substantial improvement in shift speed over the previous generation, contributing to faster and more consistent gear changes under load.

Key Features

• 12-Speed Dura-Ace Di2 System – High-performance electronic shifting for road racing
• Up to 11-34T Cassette Compatibility – Wide-range gearing support for climbing and sprinting
• Wireless + Internal Di2 Architecture – Wireless shifting at the shifter with integrated system communication for fast, precise gear change