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2008-04-28 11:29 PM

Vancouver, BC
Subject: FSA Crankset question
On FSA cranksets, there is an option for C10 or S10. C10 is for Champagnolo and S10 is for Shimano and SRAM (I think). I guess the 10 means it's for a cassette with 10 cogs? Why wouldn't it work with 8 or 9 cog cassettes?

In terms of other components, what are the compatibility restrictions of going with one or the other. If I went with C10, would that mean the cassette would also have to be from Champagnolo? What about derailleurs? And other components?


2008-04-29 6:04 AM
in reply to: #1368393

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Giver
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Subject: RE: FSA Crankset question
I think it's because the chainrings are machined specifically for narrow 10sp chains. That being said, I'm pretty sure they are interchangeable with 9sp drivetrains.
2008-04-29 7:04 AM
in reply to: #1368393

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Subject: RE: FSA Crankset question
I use FSA on 2 bikes. They're a great value price vs/ performance. Both are 9 speed Shimano drivetrains and both cranksets are marked as C10/S9 as you describe. Derailleurs are inconsequential if they're short / long cage as discated by the rest of your components. Bottom bracket (if applicable) needs to be sized for triple / double as well.

You don't mention if it's compact or regular. Compact MIGHT make a difference in the front derailleur b/c Shimano only accepts a 14 tooth difference between big and small rings (53t-39t=14t difference). I'm sure some out there have made these work; I've not tried. FSA and IRD make a compact specific front derailleur which handles the 16tooth difference of a compact. I have the FSA and it works just fine for a 50/34 compact.
2008-04-29 10:51 AM
in reply to: #1368575

Vancouver, BC
Subject: RE: FSA Crankset question
pitt83 - 2008-04-29 5:04 AM

I use FSA on 2 bikes. They're a great value price vs/ performance. Both are 9 speed Shimano drivetrains and both cranksets are marked as C10/S9 as you describe. Derailleurs are inconsequential if they're short / long cage as discated by the rest of your components. Bottom bracket (if applicable) needs to be sized for triple / double as well.

You don't mention if it's compact or regular. Compact MIGHT make a difference in the front derailleur b/c Shimano only accepts a 14 tooth difference between big and small rings (53t-39t=14t difference). I'm sure some out there have made these work; I've not tried. FSA and IRD make a compact specific front derailleur which handles the 16tooth difference of a compact. I have the FSA and it works just fine for a 50/34 compact.


The FSA crankset is compact. Do you think the following combination is OK:

crankset: FSA C-10 34-50
cassette: Champagnolo 10 speed 13-26
chain: Champagnolo

In terms of other components, I guess there are just derailleurs and shifters to consider. Any suggestions?
2008-04-29 10:53 AM
in reply to: #1369265

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Giver
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Subject: RE: FSA Crankset question

meepx2 - 2008-04-29 11:51 AM In terms of other components, I guess there are just derailleurs and shifters to consider. Any suggestions?

Since you've got a Campy cassette, you're gonna need Campy derailleurs and shifters.

2008-04-29 11:11 AM
in reply to: #1369273

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Subject: RE: FSA Crankset question
run4yrlif - 2008-04-29 11:53 AM

meepx2 - 2008-04-29 11:51 AM In terms of other components, I guess there are just derailleurs and shifters to consider. Any suggestions?

Since you've got a Campy cassette, you're gonna need Campy derailleurs and shifters.



And hubs / wheels.

This thread is piecemeal: Is your bike Campy or is your bike Shimano or SRAM? Pick one and make it 100% that convention.


2008-04-29 11:45 AM
in reply to: #1369342

Vancouver, BC
Subject: RE: FSA Crankset question
pitt83 - 2008-04-29 9:11 AM

run4yrlif - 2008-04-29 11:53 AM

meepx2 - 2008-04-29 11:51 AM In terms of other components, I guess there are just derailleurs and shifters to consider. Any suggestions?

Since you've got a Campy cassette, you're gonna need Campy derailleurs and shifters.



And hubs / wheels.

This thread is piecemeal: Is your bike Campy or is your bike Shimano or SRAM? Pick one and make it 100% that convention.


That's just the rear wheel, right?

I have another question. Suppose I have frame X. Now, I need to choose a bottom bracket with the crankset. How do I know what size of bottom bracket to buy? I think there are two common sizes, 68mm and 70mm.
2008-04-29 12:19 PM
in reply to: #1369481

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Champion
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Subject: RE: FSA Crankset question
Depends on the frame. Do you have a brand other than "X"? You need to know how the frame is threaded; English (68mm) or Italian (70mm) thread. Also, spindle length depends if you're using a double (108mm) crankset or triple (113mm). Also, it depends on what that crankset's interface is, ISIS, square taper or Octalink. Then there's the Mega Exo argument which makes my point outdated.

What are you trying to build, frame and component group? Then we can get to more exact answers.
2008-04-29 2:24 PM
in reply to: #1369588

Vancouver, BC
Subject: RE: FSA Crankset question
pitt83 - 2008-04-29 10:19 AM

Depends on the frame. Do you have a brand other than "X"? You need to know how the frame is threaded; English (68mm) or Italian (70mm) thread. Also, spindle length depends if you're using a double (108mm) crankset or triple (113mm). Also, it depends on what that crankset's interface is, ISIS, square taper or Octalink. Then there's the Mega Exo argument which makes my point outdated.

What are you trying to build, frame and component group? Then we can get to more exact answers.


Yes, the frame I am interested in is Cervelo P3C. I'm looking through the online user manual... haven't found the BB requirements yet.

Does the spindle length depend solely on double or triple? I mean, are all frames the same distance across when it comes to the length of the bottom bracket? Seems strange, unless bottom brackets can adjust to the length of the bottom bracket of the frame.

Can you please elaborate on the Mega Exo argument?
2008-04-29 5:38 PM
in reply to: #1370028

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Subject: RE: FSA Crankset question

meepx2 - 2008-04-29 2:24 PM Can you please elaborate on the Mega Exo argument?

I think Mega Exo is Campy's new crankset design. 

Traditional 3-piece cranksets have the left (plain) crankarm, right (crankset) crankarm, and the bottom bracket/spindle.  Shimano has introduced the Octalink to replace the square-taper spindle.  ISIS is the other standard, but all are essentially left-right-spindle with slightly different bearing and interface designs. 

Mega Exo puts half the spindle on the left crankarm, half on the right crankarm, and a small bolt that clamps the two pieces together.  (The two halves of the spindle are toothed so they don't slip relative to one-another.)  Mechanically, the middle of the spindle is located well inside the bearings, so is subject to very little stress, so it's a natural place to join the pieces. 

2008-04-29 7:31 PM
in reply to: #1370607

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Subject: RE: FSA Crankset question
MegaExo is FSA's marketing tool, but similar in idea to what you correctly describe as Campy's version. Basically, the spindle is part of the drive side crank arm and the bottom bracket in this case is a shell with bearings. 10speed is the later, 9 speed is spindle within the BB.

Spindle length (by in large) does depend soley on the crankset. One might be thicker than another (double vs. triple). This took me a while to reckon, but, basically, the bottom bracket positions the crankset left and right WRT the frame edge. The rear dropout on any roadbike is at a fixed position. You've just established your chain line and made that in the same plane. Unless your frame is spaced differently, only the BB length will position this correctly for you.

The BB shell is always a standard size and with a fixed rear dropout, the only variable is the BB spindle length.

Looks like a P3C is English threaded BB w/ 68mmx108mm for double cranksets. I'm assuming you're not building a triple, that's 68x113mm.

http://www.competitivecyclist.com/za/CCY?PAGE=BUY_FRAME&PRODUCT.ID=... and choose a group to see what's compatible with the frameset.


2008-04-29 11:54 PM
in reply to: #1370857

Vancouver, BC
Subject: RE: FSA Crankset question
pitt83 - 2008-04-29 5:31 PM
Looks like a P3C is English threaded BB w/ 68mmx108mm for double cranksets. I'm assuming you're not building a triple, that's 68x113mm.

http://www.competitivecyclist.com/za/CCY?PAGE=BUY_FRAME&PRODUCT.ID=... and choose a group to see what's compatible with the frameset.


That's an awesome link.
2008-04-30 8:23 AM
in reply to: #1371292

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Champion
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Subject: RE: FSA Crankset question
Good on-line shop as well. Bought my road frame from them and have nothing but compliments on customer service, timeliness and quality of their products. Expensive stuff, but this isn't Nashbar either
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