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Old 10-02-10, 07:16 PM   #1
TeamCNY
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Help converting from Shimano Dura-Ace crank and BB to compact FSA crank and BB

Recently-purchased used Argon 18 Platinum

I want to remove the crank/bottom-bracket I have (Shimano 7700 53-39Teeth) and replace it with an FSA compact crank I have.

I don't know much about different bottom brackets. There are so amny types/widths. I don't even know what type of BB my FSA crank uses (bought it at bike-club swap-meet).

My questions:
- Can I even use the FSA crank in this frame?
- If so, what BB should I buy?
- What BB hardware will I need (or does it come with the BB)?
- What tool(s) should I buy (or should I have this done at a LBS?)

I have nothing against going to a LBS, I just like to work on my own stuff.

What I have:

It look like the overall length of the BB I have is 110mm, and about 17.5 mm protrudes out of the drive-side.


I have NO idea how you can get a crank to look this bad.



If you look closely in the pics, you can see that the previous owner of this bike must have used pliers on this bottom-bracket

What I want to install:


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Old 10-02-10, 07:36 PM   #2
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1) Those FSA cranks will work.
2) They take they're ISIS comatible BB. A model which is certain to be compatible with your frame.
3) The length is determined by the model of that crank, which you then look up.
4) ISIS cranks/bb's are beginning to be orphaned since the introduction of external BB's.
5) The shimano BB is removed by any shimano 20 tooth spline compatible tool, e.g Park BBT-22.

I'm going to caution you with replacing outdated 9 speed systems with more outdated FSA crank/bb systems.
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Old 10-02-10, 07:44 PM   #3
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the ISIS BB and shimano octalink use the same 20 spline tool to be installed and removed.

I would second operator's opinion of replacing outdated octalink system with an obsolete and out of production ISIS system..
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Old 10-02-10, 07:57 PM   #4
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Out-of-production?
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Old 10-02-10, 11:28 PM   #5
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Octalink is apples, Isis is oranges,
pull the BB out of the frame and pack it up with the crankset.in a box.
look for an ISIS BB to suit your other crankset. Good Luck.
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Old 10-03-10, 07:44 AM   #6
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Quote:
Originally Posted by fietsbob View Post
...Look for an ISIS BB to suit your other crankset....
That's what this thread is all about.

While I appreciate the advice of the people warning me away from ISIS, it is what I already own.

So... getting back to Question #2 (what BB should I buy?). I looked on FSA's website, and found no specs on this crankset. I see websites selling 68 X 108mm English ISIS BBs. Is that what I need?
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Old 10-04-10, 04:23 PM   #7
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Here's the BB I bought:

VP 68x108 BOTTOM BRACKET ISIS ,198g


When it shows up, I'll find out what I need next (maybe different front derailleur).
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