The revolutionary Dura-Ace Di2 electronic shifting option with SEIS (Shimano Electronic Intelligent System) takes the already superior Shimano shifting performance to a whole new level never seen before. The increased accuracy, smoothness and reliability of electronic shifting makes gear changes faster and virtually eliminates missed shifts.
The Dura Ace 7900 Groupset is the ultimate combination of state-of-the-art technology, lightweight design and innovative appearance. It sets a new standard in road racing technology, in which details are nowadays more important than ever. Dura Ace was engineered to help competitive road cyclists win races. To do this, Dura Ace incorporates high-precision mechanisms that provide amazingly sensitive controlled response and excellent power transfer efficiency. Advanced low-mass designs reduce weight while still delivering the absolute dependability that racers demand. The Dura Ace advantage has been proven on great road courses around the world.
The Groupset includes:
- Dura Ace 7900 Chainset.
- Dura Ace 7900 Bottom Bracket.
- Dura Ace 7970 Di2 Front Mech.
- Dura Ace 7970 Di2 Rear Mech.
- Dura Ace 7900 Cassette.
- Dura Ace 7900 Chain.
- Dura Ace 7970 Di2 STI.
- Dura Ace 7900 Brake Calipers.
- Dura Ace 7970 Di2 Handlebar Cableset
- Dura Ace 7970 Di2 Frame Cableset.
- Dura Ace 7970 Di2 Battery.
- Dura Ace 7970 Di2 Battery Charger.
- Dura Ace 7970 Di2 Battery Charger Power Lead.
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