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Shimano Ultegra Di2 RD-6870 Rear Der

Item #: RD228B00
USD$169.99 SAVE 32% USD$249.99 msrp
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Shimano Ultegra Di2 RD-6870 Rear Der

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.

5.0 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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Di2
Excellent value and super fast delivery. Exceeded expectations flawless online ordering
December 29, 2016
Purchased
8 months ago
Location:
Los Angeles
Works like a charm!
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.

PROS: Attractive Design, Easy To Install, Lightweight, Durable

BEST USES: Road Biking, Upgrade, Racing
November 24, 2015
Location:
California
Smokin' deal
Medium cage for 32 is great

PROS: Attractive Design, Easy To Install
March 20, 2016
Location:
Fountain Hills, AZ
Very nice upgrade from 10spd Di2
GS RD 6870 was back ordered but came a week sooner than predicted. Not unusual as these are chronically
low stock across the US.
April 26, 2016
Location:
Mtn Brook Al
Awesome product
Used to build a Felt AR FRD which is my first go with DI2. Works perfect and i love it!
November 16, 2016
Location:
Groton CT
The future is now!!!
Great, professional service. Fast shipping. Good packaging.
October 25, 2016
Location:
Southwest

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Get free shipping with your $50 purchase today when you choose Standard Shipping at 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

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Free Shipping Offer

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.