[World B. Free]

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..

 

[bulC]

that's called chain suck

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.

 

[bear]

Does it happen with all gear choices on the rear cogs? For example, it may only happen when you're slightly cross-geared - with the chain on the smaller of the cogs on the back.