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
The Features of the Shimano Dura-Ace Di2 10 Speed Rear Mech RD7970 are:- 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 setups as well as the traditional road double
- 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
- 10-speed Dura-Ace Di2 compatible
- Weight is 225 grams