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  1. #1
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    shimano 1050 rear derailleur

    could I use this rear derailleur RD- 1050 (its made for 7 speed) with a 9 speed shimano drivetrain?
    Is there any difference between a shimano 9 speed derailleur and an 7 speed one?

  2. #2
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by jhkarl View Post
    could I use this rear derailleur RD- 1050 (its made for 7 speed) with a 9 speed shimano drivetrain?
    Is there any difference between a shimano 9 speed derailleur and an 7 speed one?
    In theory, you should have no problem. The early 105 derailleurs had the same amount of throw per cable movement as the latest 9-speed.

    In practice... maybe. The 7-speed derailleurs didn't need to move as far across the cassette as 8/9/10 speed derailleurs, so it could run out of travel even with the adjusting screws all the way out. As my friend the surgeon keeps telling me: "I dunno, let's operate and find out!"
    Jeff Wills

    All my bikes.

  3. #3
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    well, i'll try it

  4. #4
    Senior Member
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    Yes. I rebuilt a friends Shimano 7-speed to a 9-speed using the old derailleurs and old crankset. I replaced the shifters, rear hub, cassette and chain. The old derailleurs worked perfectly.

    Al

  5. #5
    Senior Member bluenote157's Avatar
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    yes.. i used the 6speed version to build a 9speed setup.. worked like a charm.

  6. #6
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    I've changed a 6-speed to an eight and the old 105 handled it no problem. No problem at all. guessing you should have no trouble with your situation, either.

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