BB-ES51 Octalink FD-E Type 121mm/68mm

Bearings - steel
Axle Material - steel
Bottom Bracket Cup Material - resin (left), steel (right)
Compatibility:
- FD-M530
- FC-M540
- FC-M510
- FC-M470
- FC-M440
- Tiagra FC-4401 (113 mm)
- Tiagra FC-4404 (121 mm)