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  1. #1
    Junior Member
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    Sep 2012
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    New Jersey
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    Lemond Zurich
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    Replace 9 sp freewheel to 10 speed?

    I ride a 2002 Lemond Zurich with an Ultegra 53/39, 175mm Crank Arms, and a 12-25 freewheel. The rear wheel is a Bontrager Racelite. The RD is an Ultegra GS. I am 53 and and although I try to ride and train as much as possible the hills in NJ/PA seem to be getting steeper. I would like to increase my high gear to a 28 but all the 9 sp cassettes I see only go to 27. Can I put a 10 sp cassette with a 28 on the bike without much problem given my RD? Also, what would be the smallest chain ring I could use to replace the 39?

    Thanks.

  2. #2
    Senior Member
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    Apr 2009
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    New Rochelle, NY
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    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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    Not a simple change. Forgetting whether you need a longer chain which is manageable, consider that 10s spacing is different than 9s spacing, so you'd need to replace the right shifter and that's not cheap. A 28t only gets you a bit less than 4% lower than you could get with a 27t, so it's hard to justify a major overhaul.
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  3. #3
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
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    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
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    Shimano has a non-Ultegra 11-28T 9-speed cassette. But like Frank said, the trivial difference won't be worth it. Just get stronger.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
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