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Old 01-26-14, 12:46 AM
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lasauge 
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Shimano 9-speed shifters only index an 8-sp cassette if you're using a 7400 derailer. Going the other way (indexing a 9-sp cassette minus one cog with 8-sp shifters an a 9-sp compatible derailer) works as long as you use "hubbub" routing. Here's the best page I know of for explaining how drivetrain mashups can be done: http://www.ctc.org.uk/cyclists-libra...gears/shimergo
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