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Dura-Ace FC-R9100 11-Speed Crankset
If you, like a few of us old souls around the Competitive offices, are holding fast to your belief in the soul of mechanical shifting, Shimano hasn't abandoned you. Though the world may very well be moving towards 100% electronic drivetrains someday in the future, mechanical still makes a hell of a case for itself. With smooth lines, elegant finishing, and functionality beyond reproach, the redesigned mechanical Dura-Ace drivetrain calmly holds its own in this brave new world of wires, batteries, and display screens. It's fitting then, that the Dura-Ace FC-R9100 11-Speed Crankset also comes with the double chainrings that many roadies are loathe to abandon just yet. Call upon your granny gear when needed with this lighter, stronger version of a top-end classic, and embrace tried-and-true tradition of cables. Of course, in the even that you do decide to run electro-shifting, the crank's ring profile plays just as nicely with Di2 derailleurs.
Shimano didn't introduce any drastic changes to its proven four-arm design, but it did make a few subtle, deliberate changes to bring it up to the most modern compatibility standards. By widening the crank arm, Shimano was able to move the chainline 0.5mm outboard; this barely perceptible repositioning was just enough to give the crankset broader compatibility with shorter chainstays and the growing number of road bikes built for disc brakes.
The gram counters will be happy to learn that beefing up the crank arm didn't result in a change in weight. Instead, Shimano was able to carefully remove internal material where it wasn't needed, strengthening only the most crucial areas of the crank arms and actually reducing weight by around a claimed 7g over the previous generation. The Japanese brand calls this process Hollowtech II, but it could very well be sorcery for all we know. In addition, Shimano also slightly reshaped the chainrings' gear teeth profile to adapt it to the gearing on disc brake-equipped race bikes.
As always, the spider is great to look at. But like with any proprietary tech, Shimano's top-secret BCD may inspire a healthy dose of skepticism. Rest assured that Shimano has its reasons. With the Dura-Ace 9100 crankset, you can run anything from a 50-34 combo to a 55-42 just by swapping chainrings, chain, and repositioning your derailleur. No need for a spider swap or an entirely new set of crank arms. Effectively, this means your bike can be a TT missile one weekend, a hill climb champ the next, and versatile all-rounder for the time in between. If you’re a privateer racer, or a self-sponsored athlete, it makes a whole lot of sense.
- A top-of-the-line classic continues to keep up with the times
- Redesigned crank arm accommodates disc brake frames
- Chainline and tooth profile adapted to gearing on disc race bikes
- Reduction in weight without a sacrifice in strength
- Allows for huge range of gearing options with a single crank
- Shimano proves there's still a place for aluminum crank arms at cycling's most elite levels
- Item #SHI00DR
- Arm Length
- 170 mm, 172.5 mm, 175 mm
- Compatible Components
- Shimano Dura Ace 9100
- Recommended Use
- Manufacturer Warranty
- 3 years
What do you think about this product?
August 24, 2020
- I've used it once or twice and have initial impressions
- True to size
First DuraAce crank set. How could it get out of the factory with a bent inner chainring. Of course Competitive sent out a chainring when I called. The packaging was in no way damaged. ? Dunno. Super happy to have a Dura Ace build up. However bike fitter thinks I should get a replacement saddle because the front of the ISM saddle are not in the same plane. Further more the LBS that built up my bike thinks the Dura Ace derailleur isn’t right. I’m going to adjust the derailleur and see if the shifts get better. It’s not at what you would expect from Dura Ace $$$$. Do 9100 DA rear derailleur have bent carbon cages?
October 4, 2019
Made the switch
Black,170mm 52/36 628g per CC, mine weigh 632.=458 +174
January 31, 2018
my favorite cranks
- I've put it through the wringer
I have been using DA cranks for quite a while now, I've had some others here and there but I always go back. They are as stiff and efficient as they come. I really can feel a difference and I'll keep putting them on my personal bikes. Hit me up with any questions on them.
December 28, 2017
- I've used it several times
I put on the crankset a few weeks ago. I’ve put on 350 Miles since then. Stiff and light. Does exactly what it should do and I’m as satisfied with it as I am with the other dura ace components.
November 20, 2017
ugly duckling that grows on you
When R9100 was first announced, I thought it was by far the ugliest group set on the market. Most people still think this, but the wide arm design has grown on me. In line with the rest of the group, its not really much of a revolution as just a small evolution. As always, the chainrings on the crank really are the shining star. Cold forged and filled with injection molded carbon fibers, they are both ridiculously stiff yet super light. They did change the spacing of the rings slightly, but they are realistically compatible with any 11 speed groupset.
February 14, 2017
Stiffer Without Sacrifices
- I've used it several times
Using these on my new Time and happy with the results so far. Stiffer and more adaptable to new frame designs (disc and shorter chainstays) and delivers power transfer and crisp shifting.
October 13, 2020
I have a 9 speed group system (dura ace), would this crankset work considering it’s 11 speed? Thanks
November 5, 2020
Hey Dennis, great question, thank you for asking. Although usually advised against for the aesthetics of unmatched Shimano bits, the front chainrings are one of the items that are a little less specific when it comes to the particular speed set-up you have (in the case of 9s, 10s, and 11s). This would work for your current set-up!
March 31, 2018
Will the quarq dFour spider bolt on to this?
December 1, 2019
March 19, 2018
my chainring is 110mm will the dura ace be compatibal to mine
November 23, 2017
I have Cervelo R5 di2 dura ace with a rotor crankset with a Bottom bracket Bbright. Do you think I change to a crankset Dura ace ?
November 26, 2017
Hey Normand, you'll need to buy adapters to run this with your bike.
July 7, 2018
It will work if you replace the bottom bracket. Get a Hambini bottom bracket to convert it. Hambini.com. Don’t scrimp on the B.B. get a Hambini and it will work great.
August 20, 2017
My current setup is DA9000. In order to utilize the 34x30 option with 9100, do I just upgrade my crank set and derailleur to 9100? Will the 9000 brake/shift levers be OK with that mix? Thanks.
March 27, 2018
Hey Steve, I asked the same question to Lennard Zinn from VeloNews and his reply was that the only thing you would need was the 9100 rear derailleur, the 9100 cassette, and a new chain to compensate for the longer throw you will need because of the larger 30 tooth cassette. You do not need to change your crankset, because both the 9000 and 9100 are 11 speed.