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. Rigorously tested to perform in all weather conditions, for all riding styles and terrain.
Shifting kit includes:
- Di2 STI Shifters.
- Di2 Front and rear derailleurs.
- Battery and charger unit.
- Derailleurs to battery to junction box cable (EW-7970 Large 890mm).
- STI's to junction box cable (SM-EW79A-E).
Key Features:
Dual Control Levers:
- Similar in look to the Dura-Ace shifters but with digital shifting, simply press to change gear.
- Shifting is easy as pressing a key on a keyboard.
- Unidirectional carbon fibre brake lever blades.
- The levers themselves weigh 155g less than mechanical 7900 levers.
- Reach adjustable and compatible with the new FlightDeck computer (sc-7900).
- Titanium fixing band and bolt.
- All cables routed internally.
- Weight 255g (pair - Manufacturer claimed).
Rear Derailleur:
- Carbon fibre pulley cage.
- Servo driven motion rather than spring action giving identical and precise shifting.
- Built-in crash mechanism which allows movement in the event of a crash.
- Weight 225g (Manufacturer claimed).
Front Derailleur:
- This contains the brains of the system, the compact CPU is housed here.
- The front derailleur tracks the chain position and trims automatically - requires no manual trim.
- Small to big ring changes are barely detectable with a smooth pedalling input, even on a climb.
- Braze-on front derailleur supplied, band-on adapters available separately.
- Weight 124g (Manufacturer claimed).
Battery pack:
- Model: SM-BTR1-A.
- Li-Ion battery with 1-1.5 hours quick charge.
- 7.4V rechargeable lithium ion battery - easily mounted to the frame and removed for charging.
- Claimed to last up to 625 miles with frequent use, battery will hold its charge for months.
- Gives a low reading when a charge is needed.
- Weight 68g (Manufacturer claimed).
Charger unit and cable:
- Charger model: SM-BCR1.
- Charger cable is the U.K. plug type.
