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  1. #1
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    Reputation: Just J's Avatar
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    New question here. Are new chainrings required to run the new 10 speed group sets?

    Hi

    I have a favourite crank which is a Race Face Deus XC which I currently have on my single speed, however I am toying with the idea of running some gears on some rides, probably 2 x 10 Sram XO.

    Please can you advise if I can use my old chain rings which are 44T and 32T or do I need ro buy some 10 speed specific rings? Surely I won't need a new crank all together though, do I?!

    Many thanks

    J

  2. #2
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    Reputation: frdfandc's Avatar
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    The 10speed rings are thinner than the 9 speed stuff. And I believe the Shimano 10 speed rings have a different offset on the big ring than a 9 speed as well.

  3. #3
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    Rings are a must... If you have the rings why are you converting to 10spd?

  4. #4
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    Quote Originally Posted by frdfandc
    The 10speed rings are thinner than the 9 speed stuff. And I believe the Shimano 10 speed rings have a different offset on the big ring than a 9 speed as well.
    I thought 2 spd crank rings were actually thicker.
    http://www.sram.com/truvativ/product...speed-crankset

    The problem is if you use a 9spd chain with a 10 spd cassette.

  5. #5
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    They are thicker than their competitors. But this thickness is in the spider/fastener area and up to the bottom of the teeth.

    But overall they are thinner in the tooth area than the 9 speed rings because the 10sp chain is narrower than a 9 speed chain.

  6. #6
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    So looking at this thread it looks like rings and crank/spiders too?...

  7. #7
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    Quote Originally Posted by Just J
    So looking at this thread it looks like rings and crank/spiders too?...
    Rings only...

  8. #8
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    I've used 10sp chains on 9sp rings for ages. Not come across any shifting issues at all
    Rimmer - "There's an old human saying - if you talk garbage, expect pain"

  9. #9
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    Interesting, thanks for all your input so far guys...

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