Shimano Dura-Ace Di2 7970 Bicycle Rear Derailleur - 10 Speed

Digital Integrated Intelligence.

The eagerly awaited Shimano Di2 (Digital Integrated Intelligence) is here. Evolution never stops - This new technology brings shifting to a new level.

It gives you a swift, definite shift every time and in every situation, for all riding styles and terrain.

Key Features:

• Dura-Ace Di2 7970 Rear Derailleur - Short Cage.
• Digital Integrated Intelligence or Di2: with programmed automatic motion at the touch of a switch the Dura-Ace Di2 rear derailleur is quick, smooth and effortless, making for unmatched drivetrain efficiency.
• Programmed automatic motion at the touch of a switch makes this derailleur quick, smooth and effortless to shift.
• The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts.
• Derailleur contains a saver (fuse) function, where the inner structure is protected from strong impacts.
• 11-27T wide gear ratio capacity will cater for compact set ups 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.
• Rigorously tested to perform in all weather conditions.
• 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.
• Weight: 225g (Manufacturer claimed).