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  1. #1
    Special Lister
    Reputation: kjsayers's Avatar
    Join Date
    Jun 2008
    Posts
    324

    Simple question...I hope.

    How do I know if I have a 9 or 10 speed crankset?

    BTW I am looking to get a single ring Atlas.

  2. #2
    mtbr member
    Reputation:
    Join Date
    Oct 2010
    Posts
    23
    post the model number.

  3. #3
    Plays with tools
    Reputation: customfab's Avatar
    Join Date
    Jun 2008
    Posts
    4,207
    9spd were 22-32-42
    10spd are 24-32-40

    10spd cranks also have Dyna-sys somewhere on them, perhaps just on the chainrings. 770 was the last model of 9. Anything 775 or newer is 10.

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