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  1. #1
    Senior Member
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    Dec 2007
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    Ultegra FC-6500 Crankset compatibility

    This may be a dumb question, but is the Ultegra FC-6500 53/39 (9 speed) crankset compatible with an Ultegra 10 sp cassette?
    I've been told that it is not. Mixing 9 and 10 speed components (Chainrings/cogs) can cause shifting problems.

    I don't think there would be an issue..... I have a beer riding on the answer..

    Thanks in advance
    You're only given a little spark of madness. You mustn't lose it. - Robin Williams

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    My Rides: '06 Giant OCR Limited & '95 GT OUTPOST

  2. #2
    Senior Member
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    Aug 2005
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    Pittsburgh, PA
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    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    Generally cranks don't care much how many cogs are in back of them and the spacing difference between the chainrings of 9 and 10-speed cranks is minimal. The concensus is that 9-speed cranks work fine with a 10-speed cassette and chain.

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