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Varispeed

Normal oscillation systems use a constant rotation of the oscillation gear that, when translated to the cam, provides an inconsistent spool speed. This results in line lay that stacks at either end of the spool. By using an oval oscillation gear, Shimano is able to alter the speed of the oscillation cam to provide a consistent spool speed. This results in an even line lay that provides excellent castability and manageability.
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