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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 08-08-05, 02:10 PM   #1
somebodies
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chain loose...sorta, sometimes

I am trying to figure out what causes this. Basically, I get my chain tight, rotate the wheel a bit, its loose, go further, ah, its tight again! I assume this is because the drivetrain is misaligned? Any thoughts?
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Old 08-08-05, 02:17 PM   #2
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Look at the section called "Chain Tension" at
http://sheldonbrown.com/fixed-conversion.html. It sounds like your chainring is not centered.

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Old 08-08-05, 02:17 PM   #3
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It's probably either an out-of-round chainring (don't worry, it happens to everybody sometime) or insanity. The former shouldn't be a big deal and you could get a nicer ring, if you'd like, but the latter you should definitely have checked out.
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Old 08-08-05, 02:29 PM   #4
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yeah, it definitely sounds like just an untrue chainring.
pretty common and nothing you can really do about it.
either deal with it or buy a new/nicer one.
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Old 08-08-05, 02:40 PM   #5
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I have never seen a drive train that does not do this to some extent, there are greater and lesser degrees of loose to tight. Centering the ring will help, but not, I think, eradicate the problem completely. Actually, I don't really consider it a "problem". That's just how it is. Don't worry. It's okay. Just make sure the chain doesn't bind too much on the tight spots or get too loose on the loose spot.
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Old 08-08-05, 02:51 PM   #6
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From my understanding, you rotate the ring until you find the most nuetral revolution of the cranks. But, it is not something you will completely eliminate, as ELC has noted. I just live with it.

Also, I have been told that the Shimano D/A track rings are the truest. Having better tolerances than the Suginos I use. But, they cost $$$.
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Old 08-08-05, 03:10 PM   #7
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Yeah, its a fairly new FSA. I tried the chainring centering thing(htanks for the link 3niktac), seems that takes some getting used to. I can probably learn to live with it...
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Old 08-08-05, 04:50 PM   #8
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hey somebodies. the p. floyd quote in your sig cracked me up...it took me a minute to dust off where i'd heard that line, and then i "got it"...very nice.

those FSAs are like sheets of metal...so it seems weird it'd be out of round already. i have one too, and the Sheldon centering technique, while not perfect, helped quite a bit.
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Old 08-08-05, 06:52 PM   #9
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I don't think I was insane before I discovered this "problem" but its driving me nuts. How oh how can it be?!
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