Shimano Hollowtech II Bottom Bracket Parts. Goes on spindle between crank spider and right hand BB cup for triple Hollowtech II cranks.
- Shimano HollowtechII triple cranks use one CR1377 on the right and one CR6774 on the left hand side
- Fits Shimano HollowtechII triple road cranks
- Fits Shimano HollowtechII triple mountain and trekking cranks made for chain case compatibility
