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  1. #1
    Senior Member mattface's Avatar
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    will 9 speed shifters work with 8 speed cassette?

    I'm converting my bike from flat to drop bars and eventually converting it to 9 speed. II got a set of Ultegra 9 speed STI shifters. I'm wondering if I can get away with continuing to use my 8 speed cassette with the nine speed shifter like I could with 6/7.

  2. #2
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    Not very well. 9-speed cogs have closer spacing than 8-speed so the shifters won't move the derailleur enough. You will get adequate shifts for a couple in each direction if you line up the middle cog exactly but it will be ragged at the extremes. You certainly will need a 9-speed chain.

    Cassettes and chains are the cheapest part of any upgrade so you might as well get them right from the beginning.

  3. #3
    Southern Gentleman sabaka's Avatar
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    Not very well. 9-speed cogs have closer spacing than 8-speed so the shifters won't move the derailleur enough. You will get adequate shifts for a couple in each direction if you line up the middle cog exactly but it will be ragged at the extremes. You certainly will need a 9-speed chain.

    Cassettes and chains are the cheapest part of any upgrade so you might as well get them right from the beginning.
    Wrong.

    Yes, you can do it, and it can work pretty well if done correctly.

    See: http://www.sheldonbrown.com/derailer-adjustment.html and scroll down about 3/4 page to the section on "Alternate Cable Routing." This setup makes up for the difference in cable pull.

    The shifters do not have anything to do with the chain. The cassette alone dictates the chain needed.

  4. #4
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    Best to upgrade the shifters, cassette and chain at the same time. The 9-speed cassette will fit on the 8-speed hub. The old derailleurs and crankset should also work fine.

    Al

  5. #5
    hello roadfix's Avatar
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    thank you for asking
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    Quote Originally Posted by Al1943
    The 9-speed cassette will fit on the 8-speed hub.
    Best option, IMO.
    .cinelli.olympic.surly.long.haul.trucker.kona.ku.surly.steamroller.
    .litespeed.classic.litespeed.firenze.bianchi.pista.dean.colonel.plus.more.

  6. #6
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    Quote Originally Posted by sabaka
    Wrong. The shifters do not have anything to do with the chain. The cassette alone dictates the chain needed.
    Correct. I was talking about when he gets the 9-speed cassette. He can continue to use the current chain with the 8-speed cassette.

    However, I still recommend doing the entire conversion. As I mentioned, the chain and cassette are the cheap part.

  7. #7
    Senior Member mattface's Avatar
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    I changed the crank, and now I need a longer chain. I'm not going 9 speed yet because I don't have the bars I need for the new 9 speed shifters.

    so new question: will 9 speed chain work on 8 speed cassette?

  8. #8
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by mattface
    I changed the crank, and now I need a longer chain. I'm not going 9 speed yet because I don't have the bars I need for the new 9 speed shifters.

    so new question: will 9 speed chain work on 8 speed cassette?
    Yes, no problem there.

    Sheldon "Easy One" Brown
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    [URL= http://harriscyclery.com] http://harriscyclery.com[/URL]
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  9. #9
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by mattface
    I changed the crank, and now I need a longer chain. I'm not going 9 speed yet because I don't have the bars I need for the new 9 speed shifters.

    so new question: will 9 speed chain work on 8 speed cassette?
    Yes, no problem there.

    Sheldon "Easy One" Brown
    [COLOR=blue][CENTER][b]Harris Cyclery, West Newton, Massachusetts[/b]
    Phone 617-244-9772, FAX 617-244-1041
    [URL= http://harriscyclery.com] http://harriscyclery.com[/URL]
    Hard-to-find parts shipped Worldwide
    [URL=http://captainbike.com]http://captainbike.com[/URL]
    Useful articles about bicycles and cycling
    [URL=http://sheldonbrown.com]http://sheldonbrown.com[/URL] [/CENTER] [/COLOR]

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