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Shimano Dura-Ace Di2 RD-7970-SS Rear Derailleur

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Low Price: $579.99
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The Shimano Dura-Ace Di2 group delivers shifting performance like none other. Seriously, this setup is awesome. With electronic shifting you get smooth, precise shifts with instant engagement, no matter what the riding conditions are like. This rear derailleur is also equipped with a built-in safety function and recalibration function in the event of impact, which keep your drivetrain working just it was the day it left the bike shop.
  • The integrated CPU keeps track of both front and rear derailleurs to optimize shifting performance and eliminate chain rub
  • Programmed motion speeds up shift times and prevents chain drop
  • Servo motor ensures that every shift is identical, so you get reliable performance
  • In the event of impact, the rear derailleur recalibrates for perfect alignment with the cassette
  • Built-in safety function automatically shifts the derailleur inward under impact to prevent damage to the component
  • Now compatible with up to a 27T rear cog for better functionality with compact cranks than other designs
  • Lightweight aluminum, carbon and titanium construction sheds grams while stiffening up the body for better shifting performance
  • Must be used with Shimano Dura-Ace Di2 7970 Rear Derailleur Wire Kit, SM-BTR1 Battery Pack, SM-BCR1 Battery Charger and SM-BCC-12 Power Cable

This product was added to our catalog on May 26, 2014