Shimano Ultegra Di2 6870 8-piece Groupset

$2,114.80

$1,799.00

Shimano Di2 Shifters
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With Di2 technology, shifting is even easier and more precise - just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear. Shimano riders will be used to them immediately since all the buttons are in the same place as on regular levers. The distance between the lever and the handlebar is adjustable. This makes it extremely easy to brake and shift even for riders with smaller hands.
Shimano Di2 Junction Box
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Shimano has simplified and improved the front junction box (junction A) for Di2. The new Di2 unit utilizes a rubber strap that cleanly and aerodynamically fastens underneath the stem. Available in either 3-port or 5-port junction.
Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Shimano Di2 Junction Box
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The Shimano Di2 SM-JC4 junction box connects the electric wires from the rear derailleur, front derailleur, battery, and shift levers. There are two types, external (mounted under the bottom bracket) and internal (for Di2 compatible frames.)
Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Battery System
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The 7.4V, high performance Lithium Ion battery is designed to deliver reliable, long life even in the worst conditions. In conditions requiring consistent and frequent shifting, the battery is capable of 1000 kilometers of use.
Battery System
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The Shimano Di2 SM-BR2 battery mount holds the battery securely to the frame. The mount is available in three styles: a long mount for external routing, a long mount for internal routing, and a short mount that is designed to be used on bike frames that bear a specific Di2 battery mounting location.
Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Shimano Di2 Front Derailleur
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Forget about chain-rub; the Shimano Ultegra 6870 braze-on front derailleur is wired in sync with the rear derailleur and automatically trims the front when you shift in the cassette. When cresting a hill, the derailleur shifts effortlessly under load from the little chainring to the big, with a light tap of the shift lever.

Shimano Ultegra Di2 offers the most precise and reliable shifting imaginable, at the push of a button. Adjust the derailleurs once, and the intelligent, auto-trimming system returns derailleurs to the same position every time. The intuitive and user-friendly design can be set up at home and accommodates any frame; new or old.
Front Derailleur Clamp (optional)
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For double cranksets

Shimano Dura-Ace Di2 clamp adapter for Shimano braze-on front derailleurs. Converts a braze-on derailleur to a clamp-on version. 1-1/4" (32mm) or 1-3/8" (35mm).

Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Shimano Di2 Rear Derailleur
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Shimano Ultegra Di2 offers the most precise and reliable shifting imaginable, at the push of a button. Adjust the derailleurs once, and the intelligent, auto-trimming system returns derailleurs to the same position every time. The intuitive and user-friendly design can be set up at home and accommodates any frame; new or old.
Wire Kit
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Never worry about cable tension or derailleur adjustment again. Simply measure four main wire lengths to accommodate your frame size, plug them into their watertight connections and you're ready to ride. The Shimano DI2 Electric Wire comes in 13 difference lengths so you can customize the wiring setup for your frame. Each EW-SD50 wire is waterproof and can be routed externally or internally. Best use for each wire length will usually be: 300-400mm forJunction Box B to front derailleur, 500-600mm for Junction Box B to rear derailleur, and 650-950 forJunction Box A to shift levers or unique routing.

Simply take four measurements on your frame: 1) Center of bottom bracket to rear derailleur (allowing for extra loop to derailleur). 2) Center of bottom bracket to front derailleur. 3) Center of bottom bracket to downtube water bottle cage (for battery). 4) Center of bottom bracket to front of stem.
Battery System
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The BCR1 charger is required for the Di2 BTR1 battery. Requires SM-BCC1 Charger Cable (not included).
The BCR2 charger is required for the Di2 BTR2 battery.
Battery System
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Power cord to fit SM-BCR1 Battery Charger and Type-A (USA, Canada) wall outlet.
Select Brake
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You will notice the advanced braking power of the Shimano Ultegra BR-6800 brakes on the very first time that you squeeze the levers, with 10% more power than 6700 brakes. Long, fast descents demand confidence. Ultegra brakes deliver, with a symmetrical dual pivot design and twin bearings reducing pivot friction and improving efficiency and controllability. Along with new low-friction BC-6800 cables, Ultegra brakes give smooth, light operation with excellent modulation.
Select Chain
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The Shimano CN-6800 11-speed chain gets Shimano's symmetrical design for super-smooth shifting and improved durability. The redesigned inner and outer links are optimized to efficiently shift under hard loads and virtually eliminate "chain suck." Features Shimano's PTFE coating for increased durability and corrosion protection. Pins included. 253 g.
Select Cassette
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Shimano's Ultegra CS-6800 11-speed cassette uses Hyperglide sprockets with revised tooth profiles for reduced wear and lightning quick shifts. A rigid aluminum carrier keeps the cogs in check for improved shifting under the most demanding gear changes. The available ratio combinations work extremely well with standard, compact or triple cranksets.
Select Crankset
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With a unique four-arm spider and Hollowtech II construction putting strength just where it's needed, the Shimano Ultegra FC-6800 crankset attains new standards for stiffness and low weight. Not only has Shimano eliminated the fifth chainring bolt, but it uses this new bolt pattern to accommodate both compact and standard chainrings on the same crank. Additionally, Shimano's super-stiff Hollowglide chainrings are available from the factory in a wide variety of sizes, including 36 x 52. 11-speed compatible.
Select Bottom Bracket
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Integrated bottom bracket for use with Ultegra FC-6800 crankset.

$1,799.00

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Description

For our Shimano Ultegra 6870 Di2 groupsets, you will need to choose five wire lengths for: shifters, down tube, front derailleur, rear derailleur and battery. Three configurations are available for battery location and wire routing, based on your frame compatibility:

  • Internal wiring with internal battery.
  • Internal wiring with external battery.
  • External wiring with external battery.

Check your frame specifications to choose which configuration works best.

There are two junction box’s needed for completing the Di2 build. Junction A is located at the handlebars and Junction B is located either internally or externally at the bottom bracket area, depending on your frame specifications. Junction A three-port option is used for standard left and right shifters. If you are using Shimano’s time trial shifters, you will need the Junction A five-port option.

The battery mount is available in three configurations: Short External, Long External, and Long Internal. The Long versions are mounted using the bottle cage mounts, and the Short version is designed for Di2-specific frames with either a down tube or chainstay mounting location.

Note: Determine your wire lengths needed and to be safe, use the next length up to eliminate the possibility of stretching wires during installation.

How To Choose Your Di2 Groupset:

1. Determine if your frame uses an internal or external battery mount, and whether the wire routing is internal or external. (See the illustrations above for your specific configuration measurements.)

2. Measure from shifters to Junction A to determine shifter wire length.

3. Measure from Junction A to Junction B to determine down tube wire length.

4. Measure from Junction B to front derailleur to determine front derailleur wire length.

5. Measure from Junction B to battery location to determine battery wire length.

6. Measure from Junction B to rear derailleur to determine rear derailleur wire length.

For further assistance please feel free to give us a call at 1-800-688-8600.

This Shimano Ultegra Di2 6870 eight-piece kit includes: Shimano Ultegra Di2 6870 front derailleur, rear derailleur, shifters; Shimano Ultegra 6800 brakes, cranks, bb, cassette and chain. Also includes Di2 Power System: 6870 Di2 Wire Kits (6); Di2 Battery, junction box, charger and cable. Cassette ranges: 11-23, 11-25, 11-28, 12-23, or 12-25.

Front derailleur clamp, frame grommets and cable covers sold separately.

Model Number
shimano-ultegra-ssfbbw12
Item Code
SSFBBW12