Shimano BB-ES300 Bottom Bracket Octalink BSA-68/73mm Shell Width

Shimano BB-ES300 Octalink bottom bracket for BSA and 68/73mm mm case width. There are various versions:
  • for chaincase
  • without chaincase
  • with spacer (chaincase can be used by using the spacer)
  • E-Type version
Among other things, suitable for:
  • FC-M521
  • FC-M522
  • FC-M523
  • FC-M4000
  • FC-T4010
  • FC-M3000-8
  • FC-T3010-8
  • FC-2403
  • FC-2450
  • FC-R453
Case width: 68/73mmmm
Material: axle steel