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  1. #1
    Needs the magic spanner knowledgdropper's Avatar
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    Jan 2009
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    Lovely Long Beach, CA
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    Specialized S-Works Tarmac SL3, Bianchi Cafe Milano
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    Swapping rear wheel - derailleur adjustment needed?

    Hey Y'all,

    I just built up my new ride & everything seems to be dialed in fine. When I swap in my trainer tire/rim, the RD no longer reaches the smallest cog. On my previous rig, this was never a problem.

    Some quick background:

    "Normal" rear is Ksyrium SL
    Trainer rear is Xero Lite(?)

    Both have identical 12-25 shimano cassettes.

    The only "odd" thing that I've noticed is that I did not use the Shimano supplied spacer on the Ksyrium- I only used the Mavic spacer. I do not notice any play in the cassette/freehub assembly this way. When I had both spacers on the Ksyrium, the RD hesitated (alot) when shifting to the smallest cog- in spite of all possible adjustments. It's like the (shimano) spacer put the smallest cog just out of the RD's reach- even with the limit screw all the way out.

    I should also add that my other set of Ksyrium SLs used both spacers and shifted fine on the old bike. I no longer have either, so I can't test it here.

    Any ideas would be great!
    "Go that way, really fast. If something gets in your way- turn." - Charles DeMar

  2. #2
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
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    1987 Bianchi Campione
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    The shimano spacer is only needed on shimano 8/9/10 hubs.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
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    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
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    Sometimes you luck out but it's not uncommon for a derailleur adjustment to be required after changing wheels.

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