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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 10-03-08, 12:36 PM   #1
throwintail
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Another chainline question

Fairly specific chainline issue here, although search gave me a few hits, I cant find exactly what I need so here goes. With my current Sugino rd crankset and formula hub the chainline is slightly off, I know this has been discussed here to no end but my question is: which cog is the thickest? Or which brand of cog offers the widest chainline spacing? I know sheldon has a table about this but I cant seem to find it. So far I have tried EAI and formula brand cogs and both were noisy and the chainline was visibly off, does anyone have experience witha cog that gives even an extra mm or two? TIA and flame if you must...
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Old 10-03-08, 04:52 PM   #2
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1/8" or 3/32" chainring and cog? You've a couple of easy options other than a newer thicker cog. Flip the chainring to the inside position on the spider or put a BB spacer between your cog and your hub, hopefully leaving enough threads to get the lockring on.
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Old 10-03-08, 05:47 PM   #3
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run the chainring on the inside of the crankarms and you'll be fine.
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Old 10-03-08, 10:49 PM   #4
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I tried the inside mounted chainring and it doesnt clear the chainstay. Soma rush frame and 46t ring, I think dura ace cogs might be the thickest I have seen, 1/8 size drivetrain BTW
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Old 10-04-08, 09:21 AM   #5
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If the 3mm bother you that much and if you don't plan on flip-flopping the wheel,you could re-space and re-dish the wheel.Personaly i wouldn't bother,but it's a option...
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Old 10-04-08, 11:00 AM   #6
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What about a more narrow bottom bracket to bring in your cranks?
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Old 10-04-08, 11:15 AM   #7
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Any suggestions for said bottom bracket? I believe I am using a 103 right now
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Old 10-04-08, 11:26 AM   #8
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Only one I know of is a Campagnolo Chorus 102mm BB which worked for me but my chainline is still off by a few mm. Others with more experience might know of a more narrow option or other 102 options. EBay is your friend. I got mine for $32. There are some adjustable BB out there which allow you to shift it left or right if I recall correctly. These might be an option?

I use an 3/32 8-speed chain which is a little more tolerant than a single speed chain since it's built to run at slight offsets.

Off-topic - that the dude from Snatch in your avatar?
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Old 10-04-08, 12:32 PM   #9
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Quote:
Originally Posted by somegeek View Post
Only one I know of is a Campagnolo Chorus 102mm BB which worked for me but my chainline is still off by a few mm.
Let's completely ignore the fact that the RD is a JIS crank and the campy 102 bb is ISO, meaning it effectively will be a 97.5mm bb.

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There are some adjustable BB out there which allow you to shift it left or right if I recall correctly. These might be an option?
Like the phil wood.

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I use an 3/32 8-speed chain which is a little more tolerant than a single speed chain since it's built to run at slight offsets.
No, it's because it's made to be derailed.
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Old 10-04-08, 12:42 PM   #10
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Let's completely ignore the fact that the RD is a JIS crank and the campy 102 bb is ISO, meaning it effectively will be a 97.5mm bb.



Like the phil wood.



No, it's because it's made to be derailed.
Must be painful for someone like you to read though all this. I'm sorry...

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