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  1. #1
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    9 speed cassette on 10 speed hub?

    I'm sure this has been asked before, so I'll be quick: is it possible to put a 9 speed cassette on a dura ace 10 speed (7800) hub?

  2. #2
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    Nope. You can put a 10spd cass on a 9spd freehub but not vice versa.
    Don't spray WD-40 in/on it. WD-40 is a TEMPORARY WATER DISPLACER, not a long term oil.

  3. #3
    Senior Member DieselDan's Avatar
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    The 7800 hub spiles are deeper, only allowing the 7800 casette to fit, but the 7800 cassette will fit any other 9 or 10 speed Shimano hub.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  4. #4
    me have long head tube TallRider's Avatar
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    Also, Shimano 9-speed cassettes will fit on all non-Dura-Ace 10-speed freehubs. Dura-Ace 10-speed is the only oddball here, because of the higher splines required to not strip since the freehub body is aluminum for light weight. Other than D/A 10-speed freehubs, all Shimano 8, 9 and 10-speed freehub bodies are compatible with all all Shimano 8, 9, and 10-speed cassettes. And of course, D/A 10-speed cassettes will fit on other Shimano freehubs.

  5. #5
    Senior Member
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    thanks everyone.

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