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Item # SHI0656

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  • Gray, 170x53/39 ($209.99)
  • Gray, 172.5x53/39 ($209.99)
  • Gray, 175x53/39 ($209.99)
  • Gray, 170x50/34 ($209.99)
  • Gray, 172.5x50/34 ($209.99)
  • Gray, 175x50/34 ($209.99)
  • Gray, 170x52/36 ($209.99)
  • Gray, 172.5x52/36 ($209.99)
  • Gray, 175x52/36 ($209.99)
  • Gray, 170x46/36 ($209.99)
  • Gray, 172.5x46/36 ($209.99)
  • Gray, 175x46/36 ($209.99)
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Item # SHI0656

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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Here's what others have to say...

Unanswered Question

Just want to be sure the Ultegra 52/36 will be compatible with my Trek Madone which has a BB90.

My road bike is Ultegra Di 10 spd equipped but the crank is a rebranded SRAM APEX crank. I would like to swap it out with an ultegra 6800 compact 50/34. Will this work? Do I need a new BB as well?

Responded on

While we have not tested it here, there are reports that you will be fine running 6800 11 speed cranks with the 10 speed group. You will indeed to get a new shimano based bottom bracket. Call me at extension 4769 if you have any questions.

I have and FSA 11 speed crankset ( stock on my 2014 Felt B14) with a BB30 bottom bracket will I be able to install an ultegra 11 speed crankset.

Responded on

only with conversion kit shimano 24mm to bb30 or new bottom bracket http://wheelsmfg.com/bb-30-shims-shimano.html
Vlad

I currently use 105 and wants to upgrade to Ultegra 6800. My Tarmac uses BB30, will I have any issues?

Best Answer Responded on

If you currently have a 105 crank on there, you already have some type of adapter to go from BB30 to Shimano's 24mm spindle. All Shimano spindles are the same diameter, so you'll be fine. Just take the old one off, put this one on, and you'll be good. Remember you'll need the special tool that fits into the black plastic cap that is on the non drive side to loosen and tighten the crank.

Unanswered Question

Would this work with my bike (without upgrading other components) if I currently have a triple ring 52/42/30T with a 9 speed cassette. I have a front derailleur shimano sora FD-3403 9 speed, and a rear derailleur tiagra for 9 speed.

I suppose I'm worried about it being compatible with my front derailleur and shifter... Common sense would say that I would need to change them, but I just wanted to check.

I have a 10 speed cassette and Ultegra FC-6750 50/34 compact crank, can I upgrade to the FC-6800 52/36 11 speed crank without having to make any other upgrades.

Responded on

Yes you can use your existing ten speed chain and cassette with the new 11 speed crankset and chainrings. The outer width of the 11 speed chain isn't very different from the 10 speed and of course the pitch of all bicycle chains is 1/2". Feel free to contact me at robsmallman@backcountry.com if you have any other questions.

Rob

Is the English threaded bb and the installation tool included? I'm guessing No, since you don't ask the buyer to select English v Italian thread...

Please confirm though

Responded on

You can run a 50/36t, but this is not a standard ring configuration for Shimano. You would nee to purchase an extra ring to make this happen. bcole@backcountry.com

Responded on

Thank you for the question, this crankset does not come with a bottom bracket or instillation tool. Please let us know if you have any other questions.

Can you run a 50/36 combination on the Ultegra 6800 crankset?

Responded on

Yes, the new shimano bolt patterns allow for whatever pattern you want where the old 5 bolts you would have to either get a standard or a compact.

I have just ordered a Jamis Renegade Elite which comes with a mid-compact 6800 52/36 crankset and the bottom bracket is an FSA PressFit 30 with Wheels MFG adaptors. I have just ordered the 6800 46/36 crankset from you and am curious if I need anything else to run this crankset with this BB setup?

Best Answer Responded on

You won't need anything else, you will be able to just swap those straight out

I ride a Tarmac SL3 Project Black (not the S-Works). Want to be sure the Ultegra crank and English BB will fit my bike. Currently have the older SRAM Red kit on the bike--don't know whether it's GXP or BB30. Am I in the clear with the Ultegra crank and English BB? Don't see any mention of GXP or BB30 specs on the Ultegra crank and BB pages. Thanks!

Best Answer Responded on

Hey there, excellent question. We are not a Specialized dealer, so I'm not expert on this but I believe that frame uses the Specialized propriety OSBB bottom bracket, which is essentially a BB30. An english bottom bracket does not fit this standard, nor does this crankset without the use of an adapter. To run the 24mm Hollowtech spindle on this, you'll need to use and adapter like the Wheels MFG BB30 adapter.

http://www.competitivecyclist.com/wheels-mfg-bb30-adapter-for-shimano?ti=U2VhcmNoIFJlc3VsdHM6YmIzMCB3aGVlbHMgbWZnOjE6MTpiYjMwIHdoZWVscyBtZmc&skidn=WHL0004-ONECOL-ONESIZ

I currently have a Tarmac SL2 with 10 spd SRAM Apex and I'm wanting to switch to this Ultegra 6800. Can I use the 6800 with all of my Apex 10spd components? Same setup (52/36 to 52/36)

Best Answer Responded on

I have been using this crankset with a 10-speed Dura Ace 7800 system for almost 4000 miles without problems.

I currently have a Dura-Ace 7800 groupset on my Ridley Damocles road bike. My crankset has 53/39 chainrings, and I have a 12-27 (10 gear) cluster. My chain is a Ultegra 6700, less than a year old. If I buy this Ultegra 6800 crankset with 50/34 chainrings, do I also need to change to a 6800 chain? Any other changes needed (BB, or...)?

Responded on

I had a similar set up. I used the 10-speed chain w/o issue on this crankset, though I have heard the 11-speed chain works fine as well on a 10-speed cassette. You do not want to use a 10-speed chain on an 11-speed cassette. It's too wide.

Does this come in a 24mm spindle option?

Best Answer Responded on

Shimano cranks are only offered with 24mm spindles.

Let me know if you have any other questions.

btowery@backcountry.com

I have this set already w/50 chainring

Question can I add a 53 chain ring to my existing Shimano Ultegra 6800 Crankset? I don't see separate chainrings for sale here?

Thanks!

Phil

Responded on

Hi Phil, thanks for your questions.

With the Shimano four-arm design and the 'top-secret' BCD you'll be able to run a 53 front chain ring. I'd also recommend sizing up your little ring as too high of a jump from your little to big ring will not allow your front derailleur to shift properly. We do not carry separate Shimano Chainrings, only complete cranksets are in stock.

Please let us know if you have any other questions.

Can I use the 6800 cranset with the rest of my 10 speed 6700 components?

Responded on

You should be able to use a 6800 crank, along with a 6800 chain, with your 6700 components and they will work together just fine.

I need upgrade guidance on my BB30 framed...

I need upgrade guidance on my BB30 framed bike as I'm already at my rule 12 n+1 limit and I don't see a new bike in the works. The bike is a stock Ultegra 6700 build except for the crank which is an FSA SL-K light standard crank. My question is whether ditching the FSA cranks is a worthwhile endeavor. Are the Ultegra cranks stiffer? I'm a muscular dude at 5'9" 185lbs and as I've gained strength on the bike these past 2.5-3 yrs I've noticed creaking from my cranks. It's super annoying and beyond that I suspect it's costing me some power transfer. I've gone through one set of BB30 bearings in the time I've owned the bike. Thanks for the input.

Responded on

Hi Gerry,

Never seen or heard of anyone hitting their "N" variable limit. Lol. Nice. I too run the SL-K in the BB30 variant and have resolved myself to a love/hate relationship with this BB "standard." The BB30 is definitely more needy than other types. Lots of peeps have developed creaking (myself included) or have had it right off the bat. Luckily I am the only one that touches my bikes and have a full compliment of shop quality tools and typically to get the bike running silent again is a BB overhaul. Take the cranks off, pop out the bearings, C-clips, clean everything very well, apply new grease and reassemble. Of course this is very easy if you have a BB30 bearing puller and press. There are very tight manufacturing tolerances with any type of press-fit bottom bracket and the slightest misalignment or wear can induce creaks under load. As for the making the switch to the Ultegra 6800 crank...you will see no difference whatsoever. Plus will have to get a BB conversion kit to run this crank on a BB30 frame (if so inclined I feel Praxis makes the best BB conversion on the market for this). The SL-K is plenty stiff and is lighter than the 6800. My suggestion would be to get a beaut of a set of Praxis chainrings (will make the SL-K even lighter) and shift like a dream, overhaul your BB, and away you go. If the creaking persists after you overhaul, I'd suggest cleaning and reassembling with Loctite 609 retaining compound. Apply a thin coat to the outside of the bearings and the BB races and press in. Grease the crank spindle and reassemble. Let it cure overnight. That usually solves the problem in stubborn cases of creak. Also when taking the bearings out, sadly the Park tool version for this is crap. Too abusive to the bearing smacking them with a hammer...not good. Get a good puller that you unscrew and gently pulls out. Helps protect the bearing races in the BB30. Cheers.

RG

Hi Gerry, <br/>  <br/> Never seen or heard of anyone hitting their "N" variable limit.  Lol.  Nice.  I too run the SL-K in the BB30 variant and have resolved myself to a love/hate relationship with this BB "standard."  The BB30 is definitely more needy than other types.  Lots of peeps have developed creaking (myself included) or have had it right off the bat.  Luckily I am the only one that touches my bikes and have a full compliment of shop quality tools and typically to get the bike running silent again is a BB overhaul.  Take the cranks off, pop out the bearings, C-clips, clean everything very well, apply new grease and reassemble.  Of course this is very easy if you have a BB30 bearing puller and press.  There are very tight manufacturing tolerances with any type of press-fit bottom bracket and the slightest misalignment or wear can induce creaks under load.  As for the making the switch to the Ultegra 6800 crank...you will see no difference whatsoever.  Plus will have to get a BB conversion kit to run this crank on a BB30 frame (if so inclined I feel Praxis makes the best BB conversion on the market for this).  The SL-K is plenty stiff and is lighter than the 6800.  My suggestion would be to get a beaut of a set of Praxis chainrings (will make the SL-K even lighter) and shift like a dream, overhaul your BB, and away you go.  If the creaking persists after you overhaul, I'd suggest cleaning and reassembling with Loctite 609 retaining compound.  Apply a thin coat to the outside of the bearings and the BB races and press in.  Grease the crank spindle and reassemble.  Let it cure overnight.  That usually solves the problem in stubborn cases of creak.  Also when taking the bearings out, sadly the Park tool version for this is crap.  Too abusive to the bearing smacking them with a hammer...not good.  Get a good puller that you unscrew and gently pulls out.  Helps protect the bearing races in the BB30.  Cheers. <br/>  <br/> RG
Unanswered Question

goodnight want to know if you have available...

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...

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...

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.