• Yeah that's it. I don't think 0.1mm will matter so much. Derailleur guide pulleys have more play than that anyway.

  • That’s 1mm over the range of the cassette though. Not a lot but enough to cause so iffy shifting at the extremes perhaps

  • Agreed. I'm not sure if the Mavic guide pulleys on the 840 have play (don't have mine to hand). But I could always replace it with a shimano one that does.

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