Shimano BB-4600 Tiagra Bottom Bracket Cups

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  • Description
  • 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, FC4603and FC4650 chainset
  • British thread