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Old 12-30-2012, 12:54 PM   #9
MrBob
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Joined: Oct 2005
Location: Boulderish, CO
Oddometer: 7,561
You are likely to get a little more mileage from the existing sprocket but
if you have a stretched chain it will dramatically reduce the life of your new sprocket. If at all possible, replace all three components at the same time. It's a simple job and not that expensive.
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