Shimano Dura-Ace Di2 9070 8-piece Groupset

$3,624.81

$3,229.00

Shimano Di2 Shifters
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State of the art Di2 electronic technology for instant and accurate shifts. 11-speed compatible, with enhanced feedback and improved ergonomics for easier access to the shift buttons from the top of the hoods. Cleaner wiring, thanks to single-wire E-tube connections, make it easy to add satellite shifters for bar tops or in the drops. The ergonomics are slimmed down and further refined for a comfortable grip.
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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For use with double crankset
Braze-on
Weight: 114 g.
Top Gear Teeth: 50-56T
Capacity: 16 tooth 11-spd

The precision actuators move the cage swiftly and smoothly for fast, silent, accurate front shifts every time. The single-wire E-tube connection to the rest of the system allows the front derailleur to automatically trim itself as you shift the rear derailleur, eliminating chain rub.

Features of Dura Ace Di2 9070 F/D
  • Integrated CPU monitors both front and rear shifting for precise and consistent derailleur alignment
  • Computer integration allows the front derailleur to track the chain eliminating the need for manual trim and also eliminates chain drop when shifting inward from the big ring.
Front Derailleur Clamp (optional)
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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 Dura-Ace BR-9000 brakes on the very first time that you squeeze the levers, with 10% more power than 7900 brakes. Long, fast descents demand confidence. Dura-Ace 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-9000 cables, Dura-Ace brakes give smooth, light operation with excellent modulation.
Select Chain
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Weight: 243 g. (116 link)

How do you make a Dura Ace chain even lighter? Just make it even thinner, to fit in an 11-speed cassette. The symmetrical 11-speed Dura-Ace chain uses hollow pins for low weight, PTFE coating for smooth shifts and offers increased durability.
Select Cassette
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Take a Dura-Ace 10 -speed 7900 cassette, add 3 grams and what do you get? The Shimano Dura-Ace CS-9000 Cassette, with 11 speeds! This amazingly light weight was achieved by a few clever design features, including a carbon mid spider carrier and all cogs over 16T being made from titanium. Plus, now with 11 speeds, you get more usable gears in each cassette range.

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 Dura-Ace FC-9000 crankset sets 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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No bottom bracket is as reliable and maintenance-free as an external threaded one, and it doesn't get any better than the Shimano Dura-Ace SM-9000 bottom bracket. The seals now have 50% less friction than 7900 series.

Description

For our Shimano Dura-Ace 9070 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 Simano Dura- Ace Di2 9070 eight-piece kit includes: Shimano Dura-Ace Di2 9000 front derailleur, rear derailleur, shifters; Shimano Dura-Ace 9000 brakes, cranks, bb, cassette and chain. Also includes Di2 Power System: 9070 Di2 Wire Kit; Di2 Battery, charger and cable. System Programmer Sold Separately.

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

Model Number
shimano-dura-ace-ssbbby12
Item Code
SSBBBY12

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