Shimano ES300 73 x 113mm Octalink V2 Spline English Bottom Bracket
Shimano BB-ES300 Octalink V2 Bottom Brackets. Fits Shimano Octalink V2 Spline Cranksets. Spindle Interface Type: Shimano Octalink V2. Bottom Bracket Shell I.D.: 1.37. BB Shell Width (mm): 73. BB Shell Width (mm)_10: 73.