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  1. #1
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    My single speed cog confuses me

    I bought a 16 tooth single speed cog and can't understand it- what's happening with it- yet. It seems to not want to let go of the chain with any tension I put on it. I know it is me, not the cog so ------ What's up and what am I missing?

  2. #2
    surly inbred
    Reputation: TroutBum's Avatar
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    What size cog? What size chain?

  3. #3
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    is the chain line plum?

  4. #4
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    The cog is a 16. I'm not sure of the chain size- but now guessing that may be the issue.

  5. #5
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    He means is it 3/32" or 1/8"? If the cog is bigger than the chain that might be what's binding it.
    Quote Originally Posted by Tone's View Post
    Id scrap the passion forum all together, its a breeding ground for unicorn milkers, rainbow chasers and candy cotton farters.

  6. #6
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    I just checked and the ring is bigger than the chain so that's the problem. So what should I change? If my chain ring is 1/8" should my cog also be 1/8"?

  7. #7
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    I just checked and the ring is bigger than the chain so that's the problem. So what should I change? If my chain ring is 1/8" should my cog also be 1/8"?

  8. #8
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    If your cog and chainring are both 1/8" use a 1/8" chain. If one is 1/8" and the other is 3/32" use a 1/8" chain. If they are both 3/32" use a 3/32" chain.
    Quote Originally Posted by Tone's View Post
    Id scrap the passion forum all together, its a breeding ground for unicorn milkers, rainbow chasers and candy cotton farters.

  9. #9
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    I had this issue with an inexpensive cog. There was flashing at the bottom of the stamped cog that was grabbing the chain. I just removed it until smooth and it was good to go.
    lean forward

  10. #10
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    26er 4 life!!

  11. #11
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    Quote Originally Posted by jan_kaspar View Post
    26er 4 life!!
    What does that have to do with the topic?

  12. #12
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    29'ers don't talk about cogs as small as 16t, unless they have superhuman power.

    Back on topic: not even all the 3/32" stuff is the same: some 3/32" cogs are a bit wider than others (like 2.2 vs 2.0 mm).
    For example these cheap stamped cogs with only the # of teeth stamped on them (sold as Gusset 1-ER and many other brand names)

    are wider than Shimano CS-MX66 cogs.


    If you have a slightly wider 3/32" cog a 9-speed chain might be too narrow for it, so in that case use an 8-speed chain, or a dedicated 3/32" SS chain like KMC Z610.

    After the cog has worn a bit, a 9-speed chain will probably fit.

    What kind of cog do you have, and what kind of chain?
    Last edited by asphaltdude; 10-18-2012 at 03:13 AM.
    Ride more!

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