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  1. #1
    Senior Member aeonderdonk's Avatar
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    Transferring Cassette from Ultegra to Mavic hubs - spacers needed?

    I recently got a set of ksyrium elite wheels from a coworker and want to transfer my cassette over and start using them. I got the cassette off, cleaned it up, and after putting it on the new hub and started tightening down I noticed a lot of play. It appears the top cog (10th) doesn't sit down far enough to mate up with the one below it (9th).

    I tried moving it to a third set of wheels with dura-ace hubs and it seated and tightened nicely with no play.

    I'm thinking that I need to put a larger spacer beneath the 1st cog to move the full cassette higher up to mate with the 10th cog. Is this flawed logic? It makes sense but I don't want to get myself into a bad situation where I'm increasing wear.

    My co-worker used to run a 9-speed cassette on the wheels and said a 10 should fit. Anyone have any advice?

  2. #2
    biked well well biked's Avatar
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    Quote Originally Posted by aeonderdonk View Post
    My co-worker used to run a 9-speed cassette on the wheels and said a 10 should fit. Anyone have any advice?
    Your friend is correct. You will need either an extra spacer or a thicker spacer than the spacer that your friend used with the 9 speed cassette. Basically, use whatever spacer arrangement you have to in order to have no lateral play and have the lockring tighten properly, just like you get with your Dura Ace hubs.

  3. #3
    Constant tinkerer FastJake's Avatar
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    +1

    Simple rule. If there is play you need to add a spacer behind the cassette. If there is no play, you do not. (Of course there are issues with 11T cogs on non-compact bodies, but I really doubt a Mavic wheel would fall into this category.)
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  4. #4
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    mavic makes a special spacer but i usually save some 10s aluminum spacers to throw on. cheaper for the customer and easier for me because i don't have to call and approve another item on the work order. they seem to get lost too easily

  5. #5
    Senior Member Jed19's Avatar
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    You need the Mavic special spacer to go on first, then the Shimano 10-Speed spacer follows, then cassette and you are all set.
    Regards,

    Jed

  6. #6
    Senior Member c.miller64's Avatar
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    You need a 1.75MM spacer.

  7. #7
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    Quote Originally Posted by Jed19 View Post
    You need the Mavic special spacer to go on first, then the Shimano 10-Speed spacer follows, then cassette and you are all set.
    just use the thin spacer (along with the thicker Mavic spacer) that came with you Ultegra cassette...it might be still stuck to the freehub on your old wheels

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