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  • 105 and Ultegra Compatibility
  • Haze
    Full Member

    Rear derailleur looks a tad twisted on my road bike, time for replacing – it’s a 105 5600.

    Am I correct in thinking my 105 5600 STI’s will only be compatible as far as the 6600 Ultegra?

    Posted 12 years ago
    Rorschach
    Free Member

    No (they don’t like the latest series calipers much though).

    Posted 12 years ago
    Haze
    Full Member

    So I can for a 6700 rear derailleur, but I’d be limited if I ever chose to replace calipers?

    Posted 12 years ago
    schmiken
    Full Member

    You can pretty much whack any Shimano road rear mech on there.

    Posted 12 years ago
    Haze
    Full Member

    Excellent, thanks.

    Posted 12 years ago
    Haze
    Full Member

    SS will run ok on a compact with 12-27 on the back?

    Ultegra 6700 SS

    Would seem to suggest so, 50-34 on the front by the way.

    Posted 12 years ago
    PaulD
    Free Member

    All road mechs were rated for 27T and suddenly became OK overnight for 28T sprockets. Unofficially they usually work up to 30T.

    SS cage was good for 29 but seems to be re-rated at 33 teeth range now and 50-34 front is OK.

    GS cage is good for a larger teeth range (triple) and 50-34 is OK.

    You propose 31T range which is now inside the current 6700-SS spec.

    PaulD

    Posted 12 years ago
    Haze
    Full Member

    Cheers Paul, as I thought…ordered!

    Posted 12 years ago
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