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Item # SHI0656 20% Off

5 5

Community Rating | 2 Reviews

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  • Gray, 170x53/39 ($271.96)
  • Gray, 172.5x53/39 ($271.96)
  • Gray, 175x53/39 ($271.96)
  • Gray, 170x50/34 ($271.96)
  • Gray, 172.5x50/34 ($255.50)
  • Gray, 175x50/34 ($255.50)
  • Gray, 170x52/36 ($271.96)
  • Gray, 172.5x52/36 ($271.96)
  • Gray, 175x52/36 ($271.96)
  • Gray, 170x46/36 ($271.96)
  • Gray, 172.5x46/36 ($271.96)
  • Gray, 175x46/36 ($271.96)
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Item # SHI0656

Description

Modeled after Dura-Ace.

With the introduction of Shimano's new Ultegra 6800 groupset, most people's focus was naturally drawn toward the additional gearing options provided by the 11th cog. But the new group is something more than just added gearing; it represents an entirely revamped drivetrain system that now integrates its top-end Dura-Ace 9000 engineering into every one of its components. The new four-arm crankset displays this most clearly, as it pulls the same striking visuals and functionality that have made 9000's cranks so popular in the pro-tour ranks.

It's quite possible that Ultegra 6800's most stunning and recognizable feature is indeed the FC-6800 crankset, as it borrows the best technology from its Dura-Ace brother. On the surface, the FC-6800 is a complete departure from the traditional aesthetics of prior Ultegra. Gone are the days of the five-arm spider, and the necessity for a separate compact crankset has also fallen by the wayside. Instead, 6800 features a shift to a new four-arm spider design. This occured for several reasons, but most notably it's because the four-arm spider matches rigidity of Dura-Ace cranks while shedding close to 26g of weight over 6700. Also similar to Dura-Ace 9000, the 6800 cranks were built with Shimano's Hollowtech II construction. Over the past few iterations of Dura-Ace, this manufacturing methodology has played an integral role in attaining weight reduction without sacrificing Dura-Ace's superior stiffness. This, again, is a welcome improvement over the previous version of Ultegra.

Shimano has learned what works, and over the years has continually added to, and improved, the ideology of Dura-Ace, which now carries over extensively to Ultegra 6800. Hollowtech II and Hollowglide are prime examples of this. Strategic placement of hollow aluminum throughout the crankset and chainrings allows more structural material to be used, and when coupled with Shimano's integrated bottom bracket, creates an unrivaled weight-to-stiffness ratio.

The four-arm spider amplifies this characteristic, but more important to Shimano, it embodies its 'rider-tuned' philosophy. In this, Shimano created 6800 to work for you, the rider. Case in point, the four-arm design and the 'top-secret' BCD allows for front chainring combinations from 46-36T to 55-42T on the same spider. 

The Shimano Ultegra FC-6800 11-Speed Crankset is available in sizes 170, 172.5, and 175mm and in 50-34, 52-36, and 53-39 chainring options. Shimano has also added a cyclocross-specific 46-36 combination in all three crank arm lengths.

Tech Specs

Arm Length:
170 mm, 172.5 mm, 175 mm
Chainring Sizes:
46/36, 50/34, 52/36, 53/39
Actual Weight:
Gray, 170x53/39: 765g Gray, 172.5x53/39: 765g Gray, 175x53/39: 765g Gray, 170x50/34: 765g Gray, 172.5x50/34: 765g Gray, 175x50/34: 765g Gray, 170x52/36: 765g Gray, 172.5x52/36: 765g Gray, 175x52/36: 765g Gray, 170x46/36: 765g Gray, 172.5x46/36: 765g Gray, 175x46/36: 765g

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Shimano Ultegra 6800 Crankset

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Here's what others have to say...

Unanswered Question

goodnight want to know if you have available...

Posted on

goodnight want to know if you have available 170 mm Shimano Ultegra 53/39 bb axis are 30

5 5

good night sorry these rods are axes bb3

  • Familiarity: I've used it several times

goodnight want to know if you have available 170 mm Shimano Ultegra 53/39 bb axis are 30

IF I CHANGE THE CHAIN RINGS ON A 6800 CRANK...

Posted on

IF I CHANGE THE CHAIN RINGS ON A 6800 CRANK FROM 50/34 TO 52/36 DO NEED A LONGER CHAIN

Responded on

There is a chance you need a longer chain depending on how long the chain was initially. The last three pictures on this web page below how the derailleur should look when a chain is installed correctly. Please contact us if you have any further questions!
http://www.pinkbike.com/news/Tech-Tuesday-Chain-Length-Basics-2012.html

I have a Specialized Tarmac SL2 with 68mm...

Posted on

I have a Specialized Tarmac SL2 with 68mm BB (I think, it's not BB30) currently running 105 drivetrain. My TT bike has the SRAM S975 Quarq crankset (BB30) with 53-39 SRAM Red TT rings on it. If I use this adapter, could I switch the crankset onto my Tarmac? Any issues using the Red rings with 105 front/rear derailleurs and chain?

Responded on

Hey Henry,

There are a few differences in both your setup and the frames you speak of. Your 68mm BB with 105 accepts a 24mm spindle on both sides (this is the Shimano/FSA standard). A SRAM BB would have a 24mm spindle on one side and a 22mm spindle on the other. The BB30 standard uses a 30mm spindle throughout so it would not fit in your Tarmac SL2. However, any crankset you buy for the Tarmac SL2 could be run with BB30 adapters on your TT bike. You'll want to look for the Wheels Manufacturing delrin (hard plastic) adapter cups. The Shimano adpater kit has two (2) 24mm internal diameter cups while the SRAM has a 24mm and a 22mm (I have both sets).

With all that said, your best bet is to trade your BB30 Quarq for a regular Quarq made for a standard 68mm external BB (this is where the cups screw into the frame) and use the SRAM adapter cups for your BB30 TT bike. If you do that, you'll be able to use the Quarq on both frames and then you can leave the Red rings on without having to keep swapping them.

Also, to clarify your question on the rings, if they are both 130BCD then they should work. If your 105 is a compact (110BCD - you'll know this is true if you're running a 50/34) then you won't be able to switch rings. The derailleurs won't matter compared to the rings, the difference comes when you have Shimano shifters with a SRAM rear derailleur or vice versa since the pull ratios are different. Front derailleur is friction, not index, which means you could use either a SRAM or Shimano FD without issue.

Good luck and feel free to ask any clarifying questions!
Chris P.

Unanswered Question

please don't laugh but would this work...

Posted on

please don't laugh but would this work with a dura ace 7700 9 speed group?
looking for a 52/36 combo, any suggestions welcome. thank you!

Will this crank work with a Di2 6700 group?...

Posted on

Will this crank work with a Di2 6700 group? I am concerned that since the 11 speed chain is narrower, the rings will have issues with a 10 speed chain. Thank you for your answer.

Best Answer Responded on

Hey! This crank will work great with the 6700 group. Its chainrings are stiff enough to stand up to Di2 shifting but the 11 speed rings will need an 11 speed chain. The 11 speed chain will work well with the rest of your 10 speed drivetrain.

HI i would like to know if this crank work...

Posted on

HI i would like to know if this crank work for my pinarello dogma 2 2012?

Best Answer Responded on

It should work great for the Dogma. If you are using a 10 speed groupo you will need to use an 11 speed chain with the 6800 crank. Also an Italian bottom bracket.

How would/can I put this on my bb30 super...

Posted on

How would/can I put this on my bb30 super X?

Does the BCD of the 172.5 crank arm for...

Posted on

Does the BCD of the 172.5 crank arm for 52/36 fit the BCD Of the 170 crank arm for 46/36?

Best Answer Responded on

Hi Bulla,
All of these cranks are going to have the same BCD. The spider design does not change between crank arm lengths.

5 5

A great Performer

  • Familiarity: I've put it through the wringer

When price point matters this crank will not disappoint. This crank has very good power transfer to the drive train and shifts between chain rings very efficiently. It will add a few grams to your bike weight, but it will also leave some $$$ in you bank account.

Unanswered Question

What he said. More specifically, will the...

Posted on

What he said. More specifically, will the 6800 work with the 10 speed Di2 Ultegra as good as the 6700 will?

I have a stages 105 power meter crank,...

Posted on

I have a stages 105 power meter crank, does the current 105 arm fit an ultegra crankset?

Responded on

Yes, the Stages power meters for Shimano are pretty much cross compatible between ANY Hollowtech II cranks.

Can i use the 6800 crank with my 6700 group...

Posted on

Can i use the 6800 crank with my 6700 group set? If so, are there any other changes i have to make?

Responded on

I just put the Ultegra 6800 46/36 crank on my cyclocross bike that has a Shimano 105-5700 front & rear derailleur. Shifts flawlessly. If it works w/the 5700 components, I don't see a reason it shouldn't work with the 6700 components.