Calvin's Corner

Mechanical musing and industry insights from Park Tool Director of Education Calvin Jones.

1 post found in September, 2008.

  • Shimano® Coasting System

    This article will discuss the Shimano® "Coasting" system. The Coasting system uses a 3-speed internal hub. The shifting is done automatically the "Automatic Unit." The electricity to operate the Automatic Unit comes from the dynamo (generating) front hub.

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