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  1. #1
    Junior Member
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    9 Speed Derailleur on 7 speed cassette?

    Sorry if this has been asked a million times before, but can i use a 9 speed r/d on a 7 speed cassette? Will my normal ezfire 7 speed shifters work with this set-up

    cassette: Shimano TZ 7
    new derailleur: http://www.jensonusa.com/store/produ...erailleur.aspx or http://www.jensonusa.com/store/sub/1...eurs+Rear.aspx , anything of that sort.

  2. #2
    Senior Member
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    Works 100%

  3. #3
    Senior Member Retro Grouch's Avatar
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    As long as you stick with a Shimano derailleur you'll be OK.

    Rear derailleurs guide the chain by the center of the link so they are unaffected by chain width.

  4. #4
    Freddin' it
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    The only other issue that comes to mind is chain width. For sure a Tiagra RD won't work with an old 5-speed chain - chain hangs in the brackets holding the pulleys as it's too wide. I think I read somewhere, though, that a 7-speed chain is narrow enough not to be a problem.

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