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Old 06-05-10, 10:20 PM   #1
elunty
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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.
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Old 06-06-10, 05:55 AM   #2
dcullen
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Works 100%
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Old 06-06-10, 06:10 AM   #3
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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.
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Old 06-06-10, 09:39 PM   #4
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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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