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2012 Campy 11 speed cranks compatibility w/sworks

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2012 Campy 11 speed cranks compatibility w/sworks

Old 02-13-12, 03:16 PM
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marc m
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2012 Campy 11 speed cranks compatibility w/sworks

Anyone know if you can swap the chainrings from the 11 speed campy to the S-works crank? I'm trying to keep the campy SR11 and use S-works crank.
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Old 02-13-12, 03:22 PM
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Campy uses a 135 bcd, where the S-works uses a 110 or 130 depending on compact or standard. You might be able to source a 135 BCD spider from specialized (contact your local shop) or have one custom made.
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Old 02-13-12, 03:51 PM
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but marc, at least you are considering the proper approach. As nice as Campy cranks are, they are pretty incompatible with Specialized Sworks bikes which have pretty unique PF30 spacing. Specialized does this to preclude other crank sales. The bike should shift well with Specialized cranks and rings however and you should be able to find the chainring sizes by either going 110 or 135...latter being their proprietary BCD.
You maybe able to adjust the spacing between the Specialized rings to 11s chain width spec. You will have to do some research on that. Not a bad idea to email Specialized tech department. They will respond and believe if you ask them about installing Campy cranks on a Sworks they will tell you they are incompatible which they pretty much are. Campy cranks are pretty unique in that spacing can't be changed because bearings are pressed onto respective spindle halves...unlike virtually every other crank out there.

Last edited by Campag4life; 02-13-12 at 03:56 PM.
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Old 02-13-12, 03:58 PM
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Or get Praxxis/Stronglight rings to drop weight and improve shifting
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Old 02-13-12, 04:20 PM
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Originally Posted by 3kmi View Post
Or get Praxxis/Stronglight rings to drop weight and improve shifting
Don't think there is natively anything wrong with Specialized crank chainrings...many run them with Campy running gear. There maybe a slight difference however in chainring spacing if running a 11s Campy driveline. I just checked the Specialized crank service manual and it doesn't look like chainring spacing can be decreased based upon fixed spider flange width which dictates spacing between rings.

Edit: I poked around the web a bit more. Seems as though Zinn and a few others I tend to believe say that the slightly narrower 11s chain is not a problem with running 10s crank spider width. Ideally, you would prefer 11s Campy spider spacing but apparently many run different brand of 10s cranks with 11s Campy drivelines without issue. Other nuance is...11s Campy chainrings for some reason are narrower. I am not sure why that would be as my understanding is the internal chain link window width is unaffected but perhaps it is for 11s and made a bit narrower. In any event, many seem to be running non Campy 10s cranks on 11s Campy drivelines with no prob.

Last edited by Campag4life; 02-14-12 at 04:25 AM.
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Old 02-13-12, 07:59 PM
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FSA also makes chainrings for Campy 11sp, in a 110 and 130 BCD.
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Old 02-14-12, 08:18 AM
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I run a Record alloy 10sp crank with my Chorus 11 drivetrain [incl 11 chain] on my rain bike. Works as well as my complete SR 11 groupset on my dry bike.
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Old 02-14-12, 05:53 PM
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The Campy 11 chain is a bit narrower that 10 speed, so the chainring teeth are also .1mm thinner. It's rare when 10 speed chainrings won't work with 11 speed. It really not the c-c spacing that's different, it's the shifting ramps. Many people have reported differences in the chainring spacing, because the noticed that the chainring mounting lugs were thinner on 10 and 11 speed rings. Those changes do NOT correlate to a change in tooth to tooth spacing. Even old 7 speed ring have about the same spacing.
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Old 02-14-12, 09:52 PM
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Originally Posted by Campag4life View Post
but marc, at least you are considering the proper approach. As nice as Campy cranks are, they are pretty incompatible with Specialized Sworks bikes which have pretty unique PF30 spacing. Specialized does this to preclude other crank sales. The bike should shift well with Specialized cranks and rings however and you should be able to find the chainring sizes by either going 110 or 135...latter being their proprietary BCD.
You maybe able to adjust the spacing between the Specialized rings to 11s chain width spec. You will have to do some research on that. Not a bad idea to email Specialized tech department. They will respond and believe if you ask them about installing Campy cranks on a Sworks they will tell you they are incompatible which they pretty much are. Campy cranks are pretty unique in that spacing can't be changed because bearings are pressed onto respective spindle halves...unlike virtually every other crank out there.
Yea, I was kinda upset after I bought I entire SR 11 group just to find out that the cranks were incompatible. I found a set of new 2011 Sworks cranks 172.5 53/39 for $300 shipped. They get here tomorrow. So now I have this super cool SR 11 Ti spindle crank.. Maybe I'll hang it on my wall like a $1000 piece of art.
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Old 02-15-12, 04:34 AM
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Originally Posted by marc m View Post
Yea, I was kinda upset after I bought I entire SR 11 group just to find out that the cranks were incompatible. I found a set of new 2011 Sworks cranks 172.5 53/39 for $300 shipped. They get here tomorrow. So now I have this super cool SR 11 Ti spindle crank.. Maybe I'll hang it on my wall like a $1000 piece of art.
Believe what you went thru is pretty common. Many don't know that Campy cranks are incompatible with Sworks frames which are PF30 with odd spacing. Specialized obviously does this to sell more Sworks cranks. You will need the spacers for the Sworks cranks to work with your Sworks PF30 spacing which is different than their other OSBB BB30 Pro level Tarmac or Roubaix Pro. Download the Specialized service manual PDF...google it to see the spacers involved. Many order Campy adapter cups for PF30 thinking they will work. They do not as the Sworks has unique spacing for PF30...not 68mm. Btw, Campy cranks work poorly with integrated BB's anyway so you are better off with the Specialized cranks on a Sworks bike. Campy cranks are quite beautiful however as you know...art...I run them on my new Roubaix Pro with threaded BB. I know of only one Sworks owner that has gotten Campy cranks to fit his bike. He machined custom adapters and cost him about $200 and a fair amont of know how to get the tolerances right.
Post a pic of your set up and come back and report how it shifts.
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