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  1. #1
    Junior Member
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    Max tooth capacity for dura ace rear derailleur 7700 GS (long cage) looking to use 34

    Howdy all,
    I am looking to use my shimano dura ace 7700 GS (long cage) rear derailleur with a 9 speed mtn cassette with 34 tooth max cog. I would like to use this cassette for touring because of it's incredible low gearing. Is the 34 tooth to big for this derailleur? thanks for everyones help.

  2. #2
    Senior Member
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    When I was investigating a cassette range bump (12-25 to 12-32), my LBS informed me that I would need a proper mtb derailleur to be able function properly with such a large cog. But that was just my experience, and I ended up going with an XT shadow RD to ensure functionality.

  3. #3
    cycles per second Gonzo Bob's Avatar
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    I've gotten my Dura-Ace RD to run on a 30 but it barely clears that. I doubt that you'll be able to get it to run on a 34. I believe the spec for max cog is 27 regardless if it short or long cage. You should look at getting a Shimano MTB rear derailer.

  4. #4
    Senior Member
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    Get something that says "Deore" on it...road der almost never clear more than 30T, be they short or long cage (some not even that much)
    2009 Motobecane Fantom CX
    2008 Jamis Coda
    1999 Trek 930

    ISO: Carradice SQR Rucksack Harness.

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