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  1. #1
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    Premature Chainring Wear?

    I am running Sram X9 2x10 cranks with a 9spd setup. My 39T chainring appears to be wearing quickly. Could the 9spd chain be causing this?

  2. #2
    Rub it............
    Reputation: frdfandc's Avatar
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    Highly doubtful.

    Do you spend most of your time in the big ring? If so, that is your answer.

  3. #3
    All 26.5" all the time!
    Reputation: Zanetti's Avatar
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    Without a photo, it's really hard to say. Most chainrings designed to shift have profiled and shaped teeth to aid shifting.

  4. #4
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    Quote Originally Posted by frdfandc
    Highly doubtful.

    Do you spend most of your time in the big ring? If so, that is your answer.
    Yes I do but when I ran 32/22, I spent most time on the 32 and did not notice as much wear in the same time period.

  5. #5
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    Quote Originally Posted by Zanetti
    Without a photo, it's really hard to say. Most chainrings designed to shift have profiled and shaped teeth to aid shifting.
    Seems like "some" teeth are lower than others and appear worn.

  6. #6
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    Quote Originally Posted by bikenut316
    Seems like "some" teeth are lower than others and appear worn.
    That sounds to me like part of the shifting profile found on many newer rings. This is the best big picture I could quickly find of a similar XX 39t ring.... notice the pairs of shorter, beveled teeth just above and below the 3 o'clock position (among others). Is that kinda what your teeth look like?

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