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This one has been driving me nuts -- when downshifting from middle to granny, when theres even slight tension on the chain, it seems to "stick" to the middle chainring, and consequently gets wrapped around the crank/bb area.

I can usually hear it happening, and backpedal to unwrap the chain, but would like suggestions on how to cure this. Thanks for any suggestions..
 

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that's called chain suck

World B. Free said:
This one has been driving me nuts -- when downshifting from middle to granny, when theres even slight tension on the chain, it seems to "stick" to the middle chainring, and consequently gets wrapped around the crank/bb area.

I can usually hear it happening, and backpedal to unwrap the chain, but would like suggestions on how to cure this. Thanks for any suggestions..
overly worn middle chainring. burrs on the chainring teeth (that you can probably file off). really gunky chain.
 
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