Rear derailleurs
Shimano Shimano CUES RD-U4020 Rear Derailleur
9-speed mechanical 2x · 11-36T
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 13, 2026
- Compatibility review
- Reviewed Aug 13, 2026
Approved technical sources
- Shimano Lifestyle Active rear derailleur specificationsManufacturerSource checked Jul 31, 2026Evidence reviewed Aug 13, 2026
- Shimano current lifestyle component ordering catalogManufacturerSource checked Jul 29, 2026Evidence reviewed Aug 13, 2026
- Shimano rear drivetrain compatibility C-454ManufacturerSource checked Jul 29, 2026Evidence reviewed Aug 13, 2026
Technical data
Specifications
- Speeds
- 9-speed
- Supported speeds
- 9-speed
- Maximum cassette cog
- 36T
- Smallest cassette cog
- 11T
- Supported cassette combinations
- 11-36t
- Supported front chainrings
- 2
- Maximum front difference
- 16T
- Drivetrain family
- Shimano CUES LINKGLIDE mechanical 1x9
- Compatible chain families
- Shimano LINKGLIDE / HG 11-speed
- Front drivetrain groups
- Shimano Cues U4000 Flatbar 2x9
- Shift actuation
- Mechanical
- Frame mounting
- Conventional hanger
- Total capacity
- 41T