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  1. #1
    Junior Member
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    May 2008
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    Replacing Broken Derailleur - Compatibility Questions?

    I need replace a shredded rear derailleur on a cheap Schwinn Hybrid.
    I have gleaned that the stock derailleur is a Shimano SIS MRX 7-speed of some sort, but markings aren't very clear.

    I have come across some SRAM derailleurs online that list compatibility with Shimano 6/7 speed shifters, will these work? is there anything I am missing that i should consider before purchasing this derailleur?

    listed SRAM 6/7 speed rear derailleur
    http://www.triathletesports.com/Prod...SB1&click=8694

  2. #2
    Senior Member
    Join Date
    Mar 2007
    Location
    Louisville, KY
    My Bikes
    Trek Madone 5.5, Klein Q Pro Elite, Surley LHT
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    actuation ration needs to be the same between the shifter and the derailleur. Wrong ratio and shifting will not work. 1:1 or 2:1.

  3. #3
    Call me The Breeze I_bRAD's Avatar
    Join Date
    Aug 2006
    Location
    Corbyville Ontario
    My Bikes
    2004 Litespeed Siena, 1996 Litespeed Obed, 1992 Miele (unknown model), 1982 Meile Uno LS.
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    that will work fine

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