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  1. #1
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    should I go long cage crank?

    Hello guys,

    I got 1x10 drivetrain. front 32 t, rear 36t-11t.

    if I use the "formula" - I get:

    T = (32-0)+ (36-11) = 57.

    I know that:

    Shimano
    Long = 45T
    Medium = 33T
    Short = 28T
    SRAM
    Long = 45T
    Medium = 37T
    Short = 30T

    does it mean I need to go long cage? currently I think I got a small or medium cage (can you tell what length exactly it is?) and run o.k. I think. should I change it anyway?

    there is the picture my derailleur:

    https://s1.postimg.org/ynrfsulcf/20151017_180616.jpg

    thanks

  2. #2
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    You did the calculation incorrectly. Because you have only one ring in the front you do not need to include it in your calculation. Your calculation should simply be 36-11 which is 25.
    2015 Niner Jet 9 Carbon
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  3. #3
    mtbr member
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    Edit: or what ljsmith said^^

    Your formula is wrong, you don't need to consider the front chainring because you only have one, with 2 or 3 chainrings you add the difference between them. In your case the total spread is 25t so a short or medium cage derailleur will work fine.

  4. #4
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    thanks very much

  5. #5
    All fat, all the time.
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    Math is fun!

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