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  1. #1
    Senior Member TassR700's Avatar
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    7 speed Sora RD to new 105 RD

    Are there any issues replacing a 7 speed Sora rear derailleur with a new 105 (I assume 9-speed) rear derailleur? I think the shifters should work fine, but I was not sure about chain clearance through the cage. Are the 7-speed chains enough wider to cause a problem? Thanks for any help. I tried searching, but came up empty.

  2. #2
    Senior Member sydney's Avatar
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    Quote Originally Posted by TassR700
    Are there any issues replacing a 7 speed Sora rear derailleur with a new 105 (I assume 9-speed) rear derailleur? I think the shifters should work fine, but I was not sure about chain clearance through the cage. Are the 7-speed chains enough wider to cause a problem? Thanks for any help. I tried searching, but came up empty.
    It works.

  3. #3
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by TassR700
    Are there any issues replacing a 7 speed Sora rear derailleur with a new 105 (I assume 9-speed) rear derailleur? I think the shifters should work fine, but I was not sure about chain clearance through the cage. Are the 7-speed chains enough wider to cause a problem? Thanks for any help. I tried searching, but came up empty.
    No issue. When you see a derailer described as "n-speed" that's marketing talk, doesn't have anything to do with function.

    Sheldon "It Works" Brown
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  4. #4
    Senior Member TassR700's Avatar
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    Thanks for the help guys. I'm performing this surgery on a friends bike tonight and I wanted to make sure we wouldn't lose the patient.
    Thanks again.

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