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  1. #1
    Senior Member Coomer's Avatar
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    From Imperfect to Perfect Chainline = Lots of Noise?

    I finally fixed my chainline on my Kilo TT today. It was 46mm or so on the front, but is now 42mm, which matches the rear chainline exactly. I also installed a new chain.

    However, once I rode the bike, it made a TON of clacking sort of noise from the chain area. I double-checked all my measurements and my chainline should be perfect. I also lubed the chain liberally and it still makes tons of noise.

    Do you guys think that riding on my cog and chainring with a bad chainline for about 1000 miles wore them down funny, so now it makes noise with a proper chainline? Or do you think it's a case of bent chainstays? Or something else?

  2. #2
    Wil
    Wil is offline
    Brake chatter on CX forks Wil's Avatar
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    I had the same issue when I too straightened out a chainline discrepancy: 45mm to 42mm. To remedy the situation I changed my chain and my cog, my cog was worn funny, actually it was just plain worn!

    During the problem solving process I used a new chain on an old cog, and it made a ton of noise, the same clackity noise as yours. It's a very disturbing noise, and feeling. I kept the original chainring, and changed the cog, along with chain, with new ones and it rides quietly now. But at first it did make noise and felt a little bit crunchy, in the drivetrain. But over time the noise and crunchy drivetrain subsided.

  3. #3
    Stoopin and Commutin HybridPilot's Avatar
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    you probably wore out the cog and/or chainring. its definitely noticeable when you install new drivetrain parts on older drivetrain parts. find out the problem, replace that particular worn part and that should make everything smooth and quiet.

  4. #4
    Senior Member JayNev's Avatar
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    oh wow, never thought of that. must be what i'm going through right now. we will see what happens as time goes on
    i'll coast when i'm dead

  5. #5
    Senior Member Coomer's Avatar
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    Good stuff...thanks for the help guys. I'll change out components when I get home and see if it helps.

  6. #6
    Senior Member Coomer's Avatar
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    Thanks again for the help. Just put the bike back together with a new cog and that fixed the problem and quieted it down completely.

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