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  1. #1
    Junior Member
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    Chain tension question

    Is it normal for the chain tension to be different with two different
    pedal positions? This is what is happening...When my right crank is
    horizontal my chain is loose, but with the pedals in any other
    position the chain is nice and tight. I'm not sure if this is normal
    or if is a chainline or chainring issue. My chainline is not perfectly
    straight, probably off by a few mm's or a cm. I think my chainring may
    be bent slightly, but would this affect chain tension that much? Any
    help or resources would be great. I've already checked out park tools
    website with little avail.
    t

  2. #2
    hello roadfix's Avatar
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    Your crank/chainring is not completely eccentric. This is very common. Try remounting your chainring.

    George
    .cinelli.olympic.surly.long.haul.trucker.kona.ku.surly.steamroller.
    .litespeed.classic.litespeed.firenze.bianchi.pista.dean.colonel.plus.more.

  3. #3
    Senior Member
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    either

    your chainring isnt centered, or you have a biopace ring.

  4. #4
    Senior Member dabern's Avatar
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    I have an entry level Fuji track that does the same thing. Try recentering your chainring using the mothod here: http://www.sheldonbrown.com/singlespeed.html#tension
    Rock Lobster

  5. #5
    Senior Member Grunk's Avatar
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    That's normal. Its because your chainring isn't perfectly round or isn't centered exactly on the crank arm. I wouldn't worry about it unless its really loose, then really tight. There's a little article on Sheldon Brown's site that explains how to center you chainring better. Its about half way donw the page under the heading "Chain Tension":

    http://www.sheldonbrown.com/fixed.html

  6. #6
    Not-so-Senior Member
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    If your chainline is off by more than 2mm, please FOR THE LOVE OF GOD do something about it. It will come off eventually, and probably quite often, and just at times when you really don't want it to (like pulling away at a busy intersection or slowing down at the bottom of a big hill with a tight bend at the bottom). This is for your own safety. Fixed gears with no chains are like car a truck at the top of a hill with no brakes and no engine: very dangerous and completely useless.

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