Bottom brackets
Shimano BB-RS501 Bottom Bracket
Italian 70 mm
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
Compare verified retailer affiliate links or search Amazon. We may earn a commission from qualifying purchases. Please confirm the exact variant before purchasing.
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
- Jul 28, 2026
- Compatibility review
- Reviewed Jul 28, 2026
Approved technical sources
- Shimano current component catalog package identityManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano front drivetrain compatibility C-455ManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano package-code and label referenceManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano package-code and label referenceManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
- Shimano road HOLLOWTECH II bottom bracket specificationManufacturerSource checked Jul 28, 2026Evidence reviewed Jul 28, 2026
Technical data
Specifications
- Supported BB shells
- Italian-70
- Supported crank spindles
- 24mm
- Front drivetrain groups
- Shimano C455 Sora 2x9, Shimano C455 Tiagra 2x10, Shimano C455 Cues Dropbar 2x11, Shimano C455 Grx 2x12, Shimano C455 105 Mechanical 2x12