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Shimano Tiagra 4600 Bottom Bracket

Shimano Tiagra 4600 Bottom Bracket. Outboard Bottom bracket bearing cups for use with Tiagra FC4600, FC4603 and Compact FC4650 2-piece cap-free design chainsets. Minimal bearing interface gives superbly smooth rolling.

  • Required for installation of FC4600, FC4603 and FC4650 chainsets
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