Shimano Dura Ace Di2 RD-R9250 12 Speed Rear Derailleur

Features and Benefits:

• The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devises and replaces the handlebar junction.
• Button on the derailleur for Di2 operations, and LED light denotes synchronized shift mode, setting mode and charge requirements.
• Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift
• Synchronized Shift designed, developed to choose the next biggest or lowest gear ratio irrespective of whether a gear change needs to be made by the front or rear derailleur
• The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching
• Low profile Shadow derailleur design
• Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts
• 11-34T wide gear ratio capacity will cater for compact setups as well as the traditional road double
• Full carbon fibre inner and outer pulley plates enhance rigidity and reduce weight
• Titanium B axle bolt for further weight savings
• High tolerance cold forged aluminium link plates and body construction is extremely light and durable
• Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting
• Pulleys are made of tough DuPont Zytel for longer life and less chain noise
• 12-speed E-tube Di2 compatible

Our fastest ever shifting across Shimano's widest ever Dura-Ace gear range, the RD-R9250 is capable of both race wins and personal bests.

The Dura-Ace RD-R9250 integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worthy 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.

Technical specifications:

• Speeds: 12s
• Shifting: Electronic, Di2
• Max tooth: 34T
• Capacity: 37T
• Colour: Black
• Weight: 215g