2009 Shimano Dura Ace introduces 7900 with Compact Crank


Dura-Ace 7900 Groupset

Irvine, CA – Shimano introduces the all new 7900 series Dura-Ace. The new mechanical Dura-Ace group loses over 135g while maintaining it’s legendary durability and improving performance and ergonomics.

Since 1973, Shimano’s Dura-Ace components have been at the forefront of pro racing and pro-level technology. Dura-Ace has continued its legacy of being proven in the peloton as well as serving as a launch pad for new technologies. Index shifting (SIS), integrated brake and shift levers (STI), and hollow forged cranks (Hollowtech II) have set Shimano’s Dura-Ace as the benchmark in road bike componentry.

FC-7900 Dura-Ace Cranksetdura-ace_7900_crank.jpg
The iconic Hollowtech II hollow forged crank has always been a benchmark for strength to weight performance characteristics and is the perfect platform for a crank intended to be used at the highest echelon of competition. Combined with a hollow outer chainring the crankset is 20% stiffer for optimal power transfer while still saving 15 grams. Other changes include redesigned chainring teeth for better contact and power transfer. Improved bottom bracket seals further reduce contamination and friction.

New for 2009, Shimano will also carry a Dura-Ace level compact crankset.

ST-7900 Dura-Ace Dual Control Levers
The new STI Dual Control levers offer a refined ergonomic shape while reducing the weight by over 40 grams. With a Shimano first, the new STI levers offer unidirectional carbon fiber lever blades which reduce weight and offer shift cables hidden under the handlebar tape for a more sleek design. Using a revised internal mechanism along with PTFE lined casing, the shifting is still as light as ever.
Shifting stroke for the rear derailleur has been reduced by 20% for quicker shifts and a built in reach adjuster allows for fine tuning the fit for riders with smaller hands.

The shifters continue to have integrated controls for the all new FlightDeck computer (SC-7900), which has been updated to include heart rate, altitude, grade, cadence, gear position, and directly downloadable data via a wireless connection. The new SC-7900 is completely wireless.

CN-7900 Dura-Ace Chain
The new asymmetric design of the Dura-Ace chain has redesigned plates that improve the contact interface with the cogs and reduce the chance for chain suck on the chainrings. Other improvements to the links provide greater durability and life with less noise and smoother function. The chain uses hollow pins and weight drops by over 18 grams even with the addition of a quick connection / removal link. A departure from the traditional Hyperglide connection pin, the SM-CN79 quicklink provides a reusable connection and removal point for the chain. The quicklink can be used on any Shimano 10-speed chain and the new chain can also be joined by a traditional Hyperglide 10-speed connection pin if necessary.

RD-7900 Dura-Ace Rear Derailleur
With a new carbon fiber rear pulley cage, the rear derailleur loses another 16 grams while maintaining durability and improving performance. The new design is compatible with wider range cogsets and can accommodate a maximum 28 tooth cog. The available wider range creates even better compatibility with compact cranksets.


FD-7900 Dura-Ace Front Derailleur
The new Dura-Ace front derailleur cage eliminates the need to manually trim the front shifting. Additionally, the redesigned, more efficient wide linkage and optimized spring tension combine for reduced shifting effort.

BR-7900 Dura-Ace Brakes
BR-7900 Dura-Ace Brakes
Increased linear response, improved braking power, and reduced weight all make their way into the latest version of the Dura-Ace brakes. A new brake pad compound doubles wet condition performance, while also improving dry power by 20%. Enhanced linear response comes from a redesigned caliper arch while a lower profile cable stop creates better lines for the cables and reduces cable friction. While other brakes ditch sensible features like a spring tension adjuster or adjustable toe, the new Dura-Ace brakes still come equipped with those features and manage to drop nearly 30 grams per pair.

FH-7900 / HB-7900 Dura-Ace Freehub and Front Hub
Both the hub and freehub body have evolved to designs that improve rigidity for efficient power transfer and quick handling. The bearings have been updated with a new tool-free bearing adjuster for quick bearing adjustments. The freehub continues with the durable titanium shell and quick engagement internals.

CS-7900 Dura-Ace Cassette
Shifting has been even further improved by creating an even more rigid (and lighter) aluminum carrier unit along with re-engineered teeth profile. Cassette design is lighter as Shimano has developed a super lightweight and rigid aluminum cassette sprocket carrier. The largest four cogs are titanium and weight is reduced by 10 grams. Available combinations will be: 11-21T, 11-23T, 11-25T, 11-27T, 11-28T, 12-23T, 12-25T, 12-27T.

CS-7900 Dura-Ace Cassette

True to tradition, Dura-Ace 7900 combines new technologies with features relevant to the highest levels of competition

Available Fall 2008

About the author: Thien Dinh

Thien Dinh gained most his cycling knowledge the old fashioned way, by immersing himself in the sport. From 2007 to early 2013, Thien served as RoadBikeReview Site Manager, riding daily while putting various cycling products through its paces. A native of California, Thien also enjoys tinkering with photography and discovering new music.

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  • paulbrown says:

    looks freakin ugly

  • dennis losgano says:

    i like the new dura ace 2009 and i hope the shifting of the new STI will more agressive and accurate. i wish to have one gorupset. thank you.

  • Darrell Richard says:

    The compact version is exactly what I’m looking for. I plan to purchase as soon as possible.

  • Darrell Richard says:

    The compact version is exactly what I am waiting for. Hope it’s out soon I’m extending the current group to wait.

  • Jose says:

    Shimano Dura-Ace(and XTR)are still the best components for my bikes. I look forward to upgrading my 7800 series to the new 7900 on my Specialized S-Works Tarmac SL2. Shimano will remain cycling’s component king. This new line is awesome.

  • Dan Higgins says:

    Rode a 2009 Roubaix S-Works with full 7900 a couple of days ago. I found the “carry” on the rear shifters to be quite long. Seemed like I needed to move it quite a distance before it engaged. Much farther than the Ultegra shifter on my current Roubaix Pro (2008).

  • Scott says:

    I have a Triple and I want to trans.. to the compact. Has anyone tried the compact from a triple I’m 215lbs and ride all the gears.

  • Joel says:

    I bought the Dura ace compact 3 weeks ago and it’s making me crazy. Becaue of the material it is made of, it will continously sound like the chain is rubbing against the derailer.
    Presently on my Wilier frame I have Dura Ace 7800 shifetrs with a Dura Ace 7800 front derailer. I changed the rear derailer for a 7900 Dura Ace derailer and replaced my 7800 Dura Ace crank with the new Dura Ace compact Crank, dura ace chain 7800 because it works better than the 7900 and the rear cassette is also Dura Ace 7900 11/28
    We have spent the last few weeks trying to figure out a solution to get rid of the noise and it’s impossible.
    Today we actuually tried around 8 differenet scenarios with my old 7800 dura ace crank or the new cassette or the new compact crank or the old cassette and no matter what we did the only time there was noise was with the new dura ace comapct crank. The material it’s made from resonates a noise that always sounds like a damn truck and makes me crazy.
    A few years ago I had a campagnola compact crank no nise. So I’m stuck to live with the noise or change for a different crank.
    I would like to know if anyone else has the compact 7900 crank and if it also makes a noise like the chain is constantly rubbing against the derailer no matter what gear you are in?

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