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  1. #1
    Videre non videri
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    Go from 8 to 9 cassette

    This is something I'm considering for the future. Not this year or next.

    My bike has an 11-30 8-speed cassette with Shimano Acera stuff.
    What, if anything, will I need to replace (besides the cassette and chain) if I want to go to an 11-34 9-speed instead?

  2. #2
    Recovering Retro-grouch CRUM's Avatar
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    You will have to change at the very least- chain, shifters,and cassette. While I have had luck using some 8 speed derailleurs when swapping over to 9 speed, also changing the rear derailleur would insure a smoother system. The front derailleur can work with either if it is cold set properly.
    Keep it 'tween the ditches

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  3. #3
    Videre non videri
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    The cassette width should be the same, right, so how could it affect the FD? Unless it's the narrower chain?

    So, cassette, chain and shifters. Pretty much what I had hoped.

    The question is if I think it's worth paying all that money to get just one extra lower gear...

  4. #4
    Senior Member sydney's Avatar
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    Quote Originally Posted by CdCf
    The cassette width should be the same, right, so how could it affect the FD? Unless it's the narrower chain?

    So, cassette, chain and shifters. Pretty much what I had hoped.
    The 9 speed FD has a slightly narrower cage than the 8 speed.

  5. #5
    Videre non videri
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    Because of the narrower 9-speed chain, right?

    Hmm, I think I'll put this off until I have a significant income...
    Being a student isn't always fun...

  6. #6
    The Rabbi seely's Avatar
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    The difference between 9 and 8spd isn't really anything to write home about. You can get yourself a nice 9spd derailleur and run it as an 8spd until you have money for the upgrade. Last I checked the XTR derailleurs even are still 8spd compatible.

  7. #7
    Videre non videri
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    Hehe, that seems rather backwards to me.
    If I have to replace the derailer, I'll do that at the same time.
    Anything else would be a waste of money...

  8. #8
    Senior Member sydney's Avatar
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    Quote Originally Posted by CdCf
    This is something I'm considering for the future. Not this year or next.

    My bike has an 11-30 8-speed cassette with Shimano Acera stuff.
    What, if anything, will I need to replace (besides the cassette and chain) if I want to go to an 11-34 9-speed instead?
    Makes me wonder if an Aceera bike is even worth spending alot on upgrades. 9 is a bit silly anyway. Shimano offers a 32 in 8 speed and sunrace has a 34.

  9. #9
    Listen to me powers2b's Avatar
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    I just converted my road bike from 8spd Sora to 9spd Tiagra.
    New shifter and cogset were needed.
    I tried Shimano Sora, 600, and RSX Derailers and found that they all work well with the 9spd set-up.
    Enjoy

  10. #10
    Videre non videri
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    Quote Originally Posted by sydney
    Makes me wonder if an Aceera bike is even worth spending alot on upgrades. 9 is a bit silly anyway. Shimano offers a 32 in 8 speed and sunrace has a 34.
    Acera is that bad?

    The 8-speed cassettes don't give me a proper gear "step".

  11. #11
    Senior Member sydney's Avatar
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    Quote Originally Posted by CdCf
    Acera is that bad?

    The 8-speed cassettes don't give me a proper gear "step".
    If you think you need a 34,get a sunrace 8 speed 11x34. Sunrace is a bit crappy,but so is Acera.

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