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  • I ignored you and bought a deckas thing.
    What width chain fits these things?
    This doesn't look right....


    1 Attachment

    • IMG_20200814_185925395.jpg
  • I had a couple that worked fine with 9 speed but not with 11 speed, even thought they were marked "7-12SPD". A few minutes with a file smoothing off the fatter teeth sorted it.

  • What width chain fits these things?

    It's not just roller width, which hasn't changed since 9-speed, there are subtle variations in plate profile between manufacturers which influence how they mesh with NW rings. You could always ask Deckas which chains they used for development.

  • In this photo, the teeth at the top are out of phase, so the wider teeth are wedging into the narrow inner-plate gap. It's not clear what's happening at the bottom of the ring.

  • You just need to move the chain around one tooth. The 'thick' chainring teeth should go between outer plates on the chain - match the red arrows up

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