Cycling Equipment · Public discussion

Sora triple + 28T granny ok?

Started by Pete Biggs · · Last activity · 3 posts · 583 views

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Cycling Equipment
Published
10 August 2003
Last activity
11 August 2003
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Pete Biggs
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  1. Hi, I'm enquiring on behalf of a Shimano user. I don't touch the stuff myself! :-) ...Well, haven't
    done for a while.

    Can Sora STIs with Sora front derailleur and 42T middle ring cope with 28T and 26T inner chainrings?

    I'm particularly concerned about the indexed nature of the front shifter and the inside profile of
    the front derailleur cage? Will it shift up ok? Or would chain always/frequently not make it and
    clatter around in no-man's land struggling to get up there?

    I'm NOT so concerned about downshifting, rubbing on bottom of cage, rear mech capicity or slack
    chain. Those things I know about. Sora indexing and derailleurs I don't!

    I'd be interested to hear from lots of people who have tried this exact combination with Sora
    equipment. What happened? What size & brand of chainrings? Stronglight and TA granny rings ok in
    this regard?

    No Campag users please: I know it works with Campy! :-)

    Thanks very much for any reports.

    ~PB

  2. new2-<< Can Sora STIs with Sora front derailleur and 42T middle ring cope with 28T and 26T inner
    chainrings? >><BR><BR>

    No roblem for the 28t, the 26 may be not so good..

    The chain might get crammed between the 42 and the 26, with the 26t..

    TA ring-

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali costruite eccezionalmente bene"

  3. Quoted message said:

    Can Sora STIs with Sora front derailleur and 42T middle ring cope with 28T and 26T inner
    chainrings?

    In general, it's rarely the size of the smallest chainring (on a triple) that causes trouble. It's
    changing the middle or larger chainring that messes up the works, because the derailleur is made to
    be a certain distance above the middle chainring to work properly, and different derailleurs are
    designed for different ranges.

    --Mike-- Chain Reaction Bicycles chainreactionbicycles.comchainreactionbicycles.com

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