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Hovis

Can anyone suggest why every once in a while my chain drops off the big ring on to the little / beyond on to the BB cluster. Tends to happen in bumpier roads, but occasionally it will happen when I rear shift.

Everything seems fine in the stand

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Vince in reply to @Hovis

FD poorly adjusted?

Either set up too high or goes back too far in.

Re-check and fit a chain catched so it can't physically drop

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Hovis in reply to @Vince

Either set up too high

You answered this question months ago but I finally got round to testing it and you were right. Had to file the braze on slot a bit to get the derailleur lower, but since I did the chain hasn't dropped once. Thanks!

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