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Shimano Dura-Ace 7900 External Bottom Bracket

The bottom bracket bearings for the HollowTech II FC7900 crankset, which is the ultimate crankset for stiffness whilst keeping weight low for performance riding and racing.

Specification
  • Minimal bearing interface gives superbly smooth rotation
  • Distinctive style that exudes quality and perfection
  • Required for installation of FC7900 chainset, with a choice of English or Italian thread BB cups