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02-07.-2008, 05:03 AM
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#1 |
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Registered User
Join Date: Dec 2004
Posts: 658
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Help required; FSA ISIS Bottom Bracket Q
I've got a couple of Truvative / Bontrager cranksets (doubles) that I need BBs for.
They're ISIS. A guy on an auction here has 2 ISIS BBs. He's measured the length of the axle at 113mm. He says thats for a triple. Is that correct? How would that length axle go for a double? Would it really be too long? Cheers  |
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02-07.-2008, 07:21 AM
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#2 |
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Registered User
Join Date: Apr 2004
Location: Perth (Basso), West Australia
Posts: 3,512
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Re: Help required; FSA ISIS Bottom Bracket Q
ISIS BBs are readily available in 108, 113, 118mm and sell for about $45. Don't get caught in an auction, measure twice, buy once.
__________________
Cheers, George. |
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02-07.-2008, 10:35 AM
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#3 | |
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Registered User
Join Date: Sep 2003
Location: Boulder County, Colorado
Posts: 499
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Re: Help required; FSA ISIS Bottom Bracket Q
Quote:
He's right. The 108 is for a double. If you try to use the 113, it will likely stick the outer chainring too far out for a double-ring derailleur to reach. |
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02-07.-2008, 05:02 PM
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#4 |
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Registered User
Join Date: Dec 2004
Posts: 658
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Re: Help required; FSA ISIS Bottom Bracket Q
Dang!
 I did have the thought that they should be about 109.5mm like Shimano Double. FSA ISIS BBs are not as cheap as $45 here in NZ so I'll have to keep looking... |
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02-07.-2008, 05:56 PM
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#5 | |
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Registered User
Join Date: Apr 2004
Location: Perth (Basso), West Australia
Posts: 3,512
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Re: Help required; FSA ISIS Bottom Bracket Q
Quote:
__________________
Cheers, George. |
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02-07.-2008, 08:12 PM
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#6 | |
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Registered User
Join Date: Jul 2005
Posts: 1,981
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Re: Help required; FSA ISIS Bottom Bracket Q
 Quote:
So, if Q-factor isn't critical (it apparently isn't to me!), then go ahead and get the BBs. If Q-factor is critical, then adjust the cleats on your shoes. |
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