Bottom brackets
Shimano Shimano BB-R9100 Bottom Bracket
BSA-68 · 24 mm HOLLOWTECH II
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Aug 6, 2026
- Compatibility review
- Reviewed Aug 6, 2026
Approved technical sources
- Shimano current component parts and ordering catalogManufacturerSource checked Aug 6, 2026Evidence reviewed Aug 6, 2026
Technical data
Specifications
- Supported BB shells
- BSA-68
- Supported crank spindles
- 24mm