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  1. #1
    Senior Member Sincitycycler's Avatar
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    Converting a Dura-Ace 12-23 to an 11-23 help!

    My current CS-7800 12-23 is configured as follows:12-13-14-15-16-17-18-19-21-23t

    Would it make sense to pop-out the 16t on my cassette and make it 11-12-13-14-15-17-18-19-21-23?

    Can the 18t be removed or is it part of a fixed cluster? That would be cool since it would be than a standard 11-23 configuration at 11-12-13-14-15-16-17-19-21-23t.

    Thanks for any advice!
    "How did all those 'Keep Off the Grass' signs get there?"

  2. #2
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    Personal opinion - the 16 is a lot more useful than the 11. Unless you're Tom Boonen, of course. I had a 13-21 7-sp (13-14-15-16-17-19-21), and now almost same 10-sp as yours (12-25, basically the 13-21 plus 12 and 23-25). Your idea is strange, it will cause a big hole between 15 and 17, then the 18? You'd be better to pop the 18 than 16?

  3. #3
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by Zouf
    Personal opinion - the 16 is a lot more useful than the 11. Unless you're Tom Boonen, of course. I had a 13-21 7-sp (13-14-15-16-17-19-21), and now almost same 10-sp as yours (12-25, basically the 13-21 plus 12 and 23-25). Your idea is strange, it will cause a big hole between 15 and 17, then the 18? You'd be better to pop the 18 than 16?
    I'm using a compact 50/34, so the 11t is not that huge.
    "How did all those 'Keep Off the Grass' signs get there?"

  4. #4
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    The 18 on a DA cassette is riveted. All cogs up to 16 are loose, then 17-27 are riveted together somehow depending on the cluster.

    http://bike.shimano.com/media/cyclin...9830536881.pdf

  5. #5
    Senior Member
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    Quote Originally Posted by Zouf
    Personal opinion - the 16 is a lot more useful than the 11.
    +1

  6. #6
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    Even with the compact, the 16 is still probably more useful. I have the same setup on my bike, but 9 speed. I have an 11-23 for racing, 12-23 for everyday, and 12-27 for uber-climbing centuries, etc.

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