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Old 03-17-09, 07:32 AM
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demoncyclist
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Join Date: Oct 2002
Location: Medway, MA
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Bikes: 2011 Lynskey Sportive, 1988 Cannondale SM400

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It is a special lockring designed to work with Fulcrum (Campagnolo) freehubs and the smaller diameter of the 11T cog. The standard Campy ring is too large and the threading is different from the Shimano ring.
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