Shimano Di2 7970 Upgrade Kit

Even though it says Dura Ace, the new Di2 components belong on their own shelf. The derailleurs look similar to their 7900 series counterparts, with just a bit of bulk added which houses the motor for each. It's the shifters that separate 7970 from 7900; they have a shape that mixes 7800 and 7900 to create a shape that's incredibly comfortable yet large enough to really wrench on when giving your all. Plus, the shifting stroke is, well, calling it a stroke would be overkill. Each shift simply requires a firm tap on the two-piece lever nested behind the brake lever blades —each "piece" activates either the upshift or the downshift. Since the brake lever is no longer used to move the chain, wrist-tweaking shifts are a thing of the past.

Besides the zero-effort shifting and perfectly sculpted lever perches, the biggest benefit of electronic shifting is the elimination of cables and their variable performance. No more deteriorating shift quality due to contamination of your cable housing, no more re-tensioning your cables after the first several hundred miles, just clean, precise, truly effortless shifting every time. Another truly incredible aspect of the Di2 is the ability to shift under load. Mash the pedals and press the minute shifter buttons for perfect shifts even under load. Cables are a thing of the past, Dura Ace Di2 is here.

Features

• Electronically activated shifting
• Refined lever shape
• Adjustable reach levers
• Carbon brake lever blades
• Carbon rear derailleur pulley cage
• Lithium ion battery
• 2000 K per charge
• Ultra-low movement shift levers
• Kit includes Shifters, Front and Rear Derailleurs, Battery and charger, and all the necessary hardware and cables to get you shifting by wire.