Shimano's fastest ever shifting across the widest ever Dura-Ace gear range, the Shimano Dura-Ace Di2 RD-R9250 12-Speed Rear Derailleur 34T Max is capable of both race wins and personal bests. The Shimano Dura-Ace Di2 RD-R9250 12-Speed Rear Derailleur 34T Max integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length that is compatible with 28-34T low sprockets brings new versatility to the world's best road component group.

Features

• Shimano's fastest ever rear shifting, 58% faster than RD-R9150
• Compact design includes an integrated wireless unit, charger, and switch
• LED status indicator
  • Battery indicator
  • Pairing
  • Adjust mode, etc.
• Wider range capacity
  • Max. low sprocket: 34T
• CFRP rear derailleur plate