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  1. #1
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    Ultegra 10 speed cassette installation on WI T11 hub

    I bought a new 12-30 10sp Ultegra cassette to install on my new wheels with WI T1 hubs. The hubs come with a spacer that I assume I need to install because they are 11 speed hubs and this is a 10 speed cassette. However, to add to my confusion, the cassette also comes with a spacer. I used both spacers when I installed the cassette but I'm still unclear if I needed to install the spacer that came with the cassette.

    It looks like the gap between the outside of my smallest cog and the end of the axle is ~5mm on my 10sp 12-30 105 cassette and ~4mm on this new cassette. So removing the spacer would make the spacing more consistent between the two wheels.

    Thanks in advance for any guidance...
    Last edited by chudak; 05-30-2013 at 10:36 AM.
    2013 Felt Z4 56cm
    1990 Basso Loto 56cm

  2. #2
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    Based on this page it would appear that I'm supposed to use both spacers. However, I'd appreciate a second opinion especially because of the spacing issues described above.

    Spacers and Hubs
    2013 Felt Z4 56cm
    1990 Basso Loto 56cm

  3. #3
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    yes, both spacers.

    If you were to use an 11 speed cassette, you would still use the spacer that same with that. You need space between the biggest cog and the spokes so they are all designed to be used with a spacer.
    The 'additional' spacer you need to use in your scenario is to make up for the difference in width between 11 and 10 speed cassettes (or to put it another way the difference between 11 and 10 speed free hubs)

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