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Shimano Di2 Ultegra RD-6870 Rear Der

USD$159.99 43% off USD$279.99 msrp
Item #: RD228B00
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USD$159.99 43% off USD$279.99 msrp
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Shimano Ultegra Di2 RD-6870 Rear Derailleur

In true Ultegra fashion, the 6870 series takes the pro tested Di2 technology from its steeper Dura-Ace big brother, to a price that non-pros can sink their teeth into. Di2 electronic shifting enables a whole new level of riding that can’t be experienced through traditional mechanical shifting, by offering smoother, faster, more precise and nearly flawless shifting. The Ultegra 6870 Rear Derailleur utilizes Shimano’s E-tube software for ingenious customization of shifting. For example, the 6870 Rear Derailleur has the ability to shift up or down through all of the gears with a single press and hold of the shift button via the multi-shift function. With the E-tube platform, the rider can customize exactly how many gear changes a press and hold actuates. Five shifting speeds are available, ranging from slow to lightning fast. On top of it all, there are no cables to wear out or become contaminated. Go Ultegra 6870 for precise, insanely fast shifts across an 11-speed cassette, no matter the conditions, with just one click of a button. Finally, customize your gearing choices for tough climbs with an all-new 32T cog capacity in the GS cage version of the derailleur.

  • Sealed bearing tension pulley
  • Cage Length: Short
  • Cassette Spacing: Shimano/SRAM 11-speed
  • Chain Wrap Capacity (teeth): 33 teeth (SS cage), 37 teeth (GS Cage)
  • Maximum Sprocket: low – 28T, top – 12T
  • Minimum Sprocket: low – 23T, top – 11T
  • Maximum Front Difference: 16T
  • Color: Gray
  • Largest Cog (teeth): 28 teeth (SS cage), 32T (GS cage)
  • Shifter/Derailleur Compatibility: Shimano Ultegra Di2 11 speed
  • Weight (g): 250 g (SS), 260g (GS)

Please Note: All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions. To update the firmware on your components, use the Di2 system checker from Shimano by clicking here.

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REVIEW SNAPSHOT®

by PowerReviews
Shimano Di2 Ultegra RD-6870 Rear Der
 
5.0

(based on 3 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

Reviewed by 3 customers

Displaying reviews 1-3

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5.0

Very nice upgrade from 10spd Di2

By sch

from Mtn Brook Al

Verified Buyer

Comments about Shimano Di2 Ultegra RD-6870 Rear Der:

Bought this along with the 11spd FD and newer brifter-derailler connection box to upgrade an 11-28 10spd
Di2 set up from 2013 to 11-32 11spd setup. Reused the older wiring and battery. Went together in about
an hour with R&R of RD/FD and bar tape to access the brifter connex. Then used a local dealer computer to
make sure the 6770 brifters played nice with the 6870 RD/FD which they did. Works a treat and now have
a 34/32 low end.

 
5.0

Smokin' deal

By McG

from Fountain Hills, AZ

About Me Avid Cyclist

Verified Buyer

Pros

  • Attractive Design
  • Easy To Install

Cons

    Best Uses

    • Road Biking

    Comments about Shimano Di2 Ultegra RD-6870 Rear Der:

    Medium cage for 32 is great

    • Was this a gift?:
    • No
     
    5.0

    Works like a charm!

    By gr2

    from California

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Attractive Design
    • Durable
    • Easy To Install
    • Lightweight

    Cons

      Best Uses

      • Racing
      • Road Biking
      • Upgrade

      Comments about Shimano Di2 Ultegra RD-6870 Rear Der:

      I purchased this derailleur so that I could install a 32T gear. It installed easily and was simple to adjust. I used to have a short cage 10 speed version. I can hardly tell the difference. This new one performs just as good. The shifting is fast and smooth. Thus far, I've yet to have any problems. I would recommend it to anyone.

      • Was this a gift?:
      • No

      Displaying reviews 1-3

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      Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

      Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.