Shimano Dura-Ace 7900 Di2 Groupos

4.38/5 (13 Reviews)
MSRP : $5500.00

Product Description

Shimano's Dura-Ace Di2, a technologically advanced, electronic shifting option for the all new 7900 series Dura-Ace. Comprised of Dual Control type shift / brake levers, front derailleur, rear derailleur, and a battery pack, the new Dura-Ace Di2 7970 components provide precision electronic performance and integrate seamlessly with components from the 7900 series Dura-Ace group while adding only 68 grams to the entire group.
Electrically actuated shifting significantly eliminates issues associated with cable friction and contamination because the derailleurs respond to electrical impulses that are delivered in fractions of a second. The shifters are now merely switches which also allows for creative placement of optionalremote shifters while also reducing the weight and profile of the main shift units. Derailleur movement is precisely controlled through computer automated movement and servo motors creating perfectly synchronized and calibrated shifts every time.

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Reviews 1 - 5 (13 Reviews Total) | Next 5

User Reviews

Overall Rating:1
Value Rating:1
Submitted by COrider10 a Recreational Rider

Date Reviewed: December 21, 2012

Strengths:    Reputation and reviews.

Weaknesses:    Would be nice if it worked!

Bottom Line:   
I took out a Fuji Altamira with the Ultegra electronic shifters for a test ride. I was impressed and was then able to find a different Fuji with the full Dura-Ace Di2 set nicely priced. It worked when it left the shop, but after a week's bad weather, it would not power or charge when I tried my very first ride. Despite gentle handling, the battery holder fell off the bike frame into my hand.
Simply horrible quality for a premium priced component. Now we'll see if Shimano stands behind its product.

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Similar Products Used:   Shimano Ultegra Di2.

Overall Rating:5
Value Rating:4
Submitted by shavon a Recreational Rider

Date Reviewed: February 26, 2012

Strengths:    can shift on hoods or drops
considerable admiration when the cycling cognosenti notice...

Weaknesses:    it ain't cheap

Bottom Line:   
Other reviewers have described the flawless consistent shifting, how shifts never ever fail, there's no dropping the chain, long battery life, etc.,& I second those assessments. I love the Di2 on 'sharp' rollers , where the grade instantly changes from up to down or vice versa--ie, no flattening out at the bottom or top of the roller. Then you appreciate the front shifting. It's instant, it's crisp.
Another reason I went electronic is because, w/ age, there is arthritis in my finger joints.... all the shifting on long rides caused alot of aching (especially the front shifting lever push). Now it's tap, tap, tap. Light. Easy.

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Favorite Ride:   anywhere with friends

Similar Products Used:   ultegra; mix of SRAM Red/Campy

Bike Setup:   Seven Elium ; Rolf Prima Dauphine wheelset; Di2

Overall Rating:5
Value Rating:5
Submitted by Russell a Road Racer

Date Reviewed: July 18, 2011

Strengths:    Quick - Smooth - Long Battery Life - Shifts from Two locations

Weaknesses:    None

Bottom Line:   
Had the Di2 installed on 2011 Cervelo P3 time trial bike. This is the sweetest setup I have every used. Unlike regular aero bar shifters you can shift from the bull horns. This is very useful during training. Works extremely well during racing.

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Favorite Ride:   Any Time Trial

Price Paid:    $2600.00

Purchased At:   Big Bang Bikes

Bike Setup:   2011 Cervelo P3 - Zipp 303/808/Discs - Rotor Time Trial Crank Set 53/42

Overall Rating:5
Value Rating:4
Submitted by stcamp a Triathlete

Date Reviewed: January 1, 2011

Strengths:    Precision, dependability, battery life

Weaknesses:    Wiring harness (would like to see a wireless version) and slight weight increase

Bottom Line:   
Recommended by head mechanic and fellow rider. Similiar comments regarding shifting, accuracy, and reliability kept coming up. Have used Di2 for almost 4 months and am very pleased, especially when standing up on a sprint and gearing up or down and never having to worry about a gear change. Not sure if its as fast as mechanical, yet it is more quiet. I would say shifting up from inside chain ring is easier. I also clean my bike every week, yet wanted to see how the shifts executed if I did not clean the chain & derailleurs for one month (it was tough looking at a dirty drive train), yet the shifting was as precise on a gritty drive train then as the day I bought the system.

The price paid was for shifters, both derailleurs, housing, wires, battery. No crank or brakes....and of course, install/labor.

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Favorite Ride:   Anything with hills

Price Paid:    $2700.00

Purchased At:   LBS

Similar Products Used:   Only mechanical with SRAM Red & Shimano DA

Bike Setup:   Lynskey Helix

Overall Rating:5
Value Rating:5
Submitted by malikgp a Road Racer

Date Reviewed: September 2, 2010

Strengths:    Instantaneous Shifts
Queued Shifts
Cross-chained Shifts
Small-to-Big Ring Shifts while sprinting
Only 1hr charge-time required
1000+ miles on a single charge
Works in Rain, Heat, Clouds, Fog, etc

Weaknesses:    None

Bottom Line:   
I was highly skeptical of the Shimano 7970 Di2 Gruppo. How could it be so much better that it would command that much of a premium over the mechanical 7900?

$3500 retail for the upgrade kit? $4800 retail for the default? Really? But I was curious after seeing some reviews. That said, I desperately needed to demo the Di2 for myself before even thinking of plunking down that kind of change.

I finally found a store that had the Di2 on the high end 2010 Specialized Tarmac Di2 and took it for a test spin.

After only a few blocks of shifting, I was 100% sold. Electronic shifting is, simply put, the present and the future.

It's far ahead of the brake/shift lever system as the brake/shift lever system was ahead of index shifting.

There is simply no comparison, but unfortunately there is no way for you to truly get a sense of what this gruppo can do until you actually try it out for yourself.

Thankfully I was able to find a storefront on eBay and buy the full 7970 gruppo for $2900 for a savings of $1800 compared to retail.

Considering you can purchase the mechanical 7900 system for $1600, the premium for the full 7970 gruppo is more than worth it.

If you have the money, buy it. Hands down.

Expand full review >>

Favorite Ride:   Fast, Faster, Fastest, Hilly, and Vicious :D

Price Paid:    $2900.00

Purchased At:   eBay

Similar Products Used:   Shimano Deore
Shimano Ultegra SL 6600-G 10-Speed Double

Bike Setup:   Custom Serotta HSG GS Frame
Shimano 7970 Groupset
Zipp 404 Carbon Clincher Wheelset
Chris King Headset
Ritchey WCS Carbon Matrix Stem 3K
Ritchey Super Logic Evolution Bar
Ritchey WCS Carbon Seatpost
Selle Italia SLR Gel Flow
Maxxis Cormet Tires
Deda Bar Tape
Shimano 7810 SPD-SL pedals
2x Arundel Mandible Carbon Fiber Cage

Reviews 1 - 5 (13 Reviews Total) | Next 5

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