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Old 07-11-09, 10:22 PM   #1
jhkarl
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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?
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Old 07-11-09, 10:27 PM   #2
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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!"
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Old 07-11-09, 10:32 PM   #3
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well, i'll try it
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Old 07-12-09, 04:58 PM   #4
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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.

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Old 07-12-09, 07:33 PM   #5
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yes.. i used the 6speed version to build a 9speed setup.. worked like a charm.
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Old 07-12-09, 09:42 PM   #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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