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Old 05-07-09, 03:37 PM
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The chain on a 10 speed is more narrow than a 9 speed chain. because the cogs on the cassette are closer together on a 10 speed verses a 9 speed. The small ring should lso be changed to a 10 speed specific one. the space between the rings is narrower on a 10 speed setup. the teeth on the small ring are off set towards the large ring to keep the chain from getting stuck between the chain rings.

To go from 9 speed to 10 speed you will need. shifter(s) at least right side. front derailure( cage spacing is different) . small front chain ring. chain. cassette.
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