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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-25-05, 06:28 PM   #1
BostonFixed
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Cog Widths?

I am making my winter SS bike into a fixed bike, and I will need to do this via the 'bumbike' loctite method of attaching the cog to the hub. I know the limitations of this setup, and that i'm putting my self at risk, etc.
I want as much room as possible for a BB lockring, so I need a thin-ish cog.
Anyone know the widths of the threaded part of:
Surly Cogs? Old/New?
Durace?
EAI?
Any Others?

Thanks
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Old 01-25-05, 06:34 PM   #2
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not positive, but i think the old surly's where the thinnest,
i don't have the exact dim's cause i don't have one anymore,
but i remember it being thinner than my EAI and DA
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Old 01-25-05, 06:36 PM   #3
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As always, Sheldon Brown is your friend

Scroll down about halfway thru the page.
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Old 01-25-05, 06:40 PM   #4
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no wonder they call him captain bike
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Old 01-25-05, 06:46 PM   #5
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...and the different widths are another reason that the highly praised 42mm track chainline is ballpark at best.
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Old 01-25-05, 07:40 PM   #6
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Quote:
Originally Posted by 46x17
...and the different widths are another reason that the highly praised 42mm track chainline is ballpark at best.
Or 52mm in the case of a MTB based fixie, which I apparently missed by about 0.3mm from target if my calipers and measuring methodology are to be believed.

Has anybody ever asked / has the question ever really been answered......how close is close enough for chainline?
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Old 01-25-05, 08:35 PM   #7
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Originally Posted by dobber
Has anybody ever asked / has the question ever really been answered......how close is close enough for chainline?
If you race, the answer is easy enough. Is perfect chainline possible? (yes) Whether you need it or not depends upon whether you need to blame some lack or performance on your bike instead of yourself.

for most people, who cares... I mean, if it bothers you, make it perfect so you can move on. If it doesn't bother you it is, literally, 'good enough.'

the answer isn't in the bike.
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Old 01-26-05, 04:07 AM   #8
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Originally Posted by thechamp
If you race, the answer is easy enough. Is perfect chainline possible? (yes) Whether you need it or not depends upon whether you need to blame some lack or performance on your bike instead of yourself.

for most people, who cares... I mean, if it bothers you, make it perfect so you can move on. If it doesn't bother you it is, literally, 'good enough.'

the answer isn't in the bike.

Have you though about political office?
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