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      Description

      Shimano BB-ES300, Octalink BB Shell, 68mm, 121mm Steel, Silver Bottom Bracket

      • Replacement for BB-ES25, now 25g lighter
      • Tubular 22mm spindle for Octalink V2 crank arms
      • More rigid assembly than square taper
      • Sealed cartridge bearings
      • Mounting bolts not included