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Rear derailleurs
Campagnolo Campagnolo Chorus 12-Speed Rear Derailleur
Mechanical 2×12 · 29–34 cage
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 2, 2026
- Compatibility review
- Reviewed Aug 2, 2026
Approved technical sources
- CRDCHORUS12S official product-family evidenceManufacturerSource checked Aug 2, 2026Evidence reviewed Aug 2, 2026
- Chorus mechanical rear-derailleur limitsManufacturerSource checked Aug 2, 2026Evidence reviewed Aug 2, 2026
- R2-Bike current exact package recordRetailerSource checked Aug 2, 2026Evidence reviewed Aug 2, 2026
Technical data
Specifications
- Speeds
- 12-speed
- Supported speeds
- 12-speed
- Maximum cassette cog
- 34T
- Supported cassette combinations
- 11-29t, 11-32t, 11-34t
- Supported front chainrings
- 2
- Maximum front difference
- 16T
- Drivetrain family
- Campagnolo Chorus mechanical 2x12
- Compatible chain families
- Campagnolo Chorus 12-speed
- Shift actuation
- Mechanical
- Frame mounting
- Conventional hanger
- Total capacity
- 39T