Shimano CUES RD-U4000 Rear Derailleur – 9-Speed Shadow Design (GS)
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- Free shipping on parts & accessories orders $150+
- $15 freight for orders under $149.99
Shimano CUES RD-U4000 Rear Derailleur – 9-Speed Shadow Design (GS)
The Shimano CUES RD-U4000 rear derailleur is a tough, reliable 9-speed option built for modern recreational and trail bikes. Featuring Shimano’s low-profile Shadow Design and a wide-range GS medium cage, it delivers smooth, consistent shifting while staying protected from trail strikes and everyday riding abuse.
Designed as part of the Shimano CUES ecosystem, the RD-U4000 prioritises durability, chain stability and easy servicing — making it ideal for riders who want dependable performance without complexity.
Key Features
- Compatible with Shimano CUES 9-speed drivetrains
- GS (medium cage) for wide-range cassette compatibility
- Shadow Design for a low-profile, trail-safe setup
- Top-normal spring orientation
- Direct mount attachment
- Built for durability and everyday trail riding
Compatibility
- ✔ 2026 Specialized Rockhopper Sport
- ✔ 2026 Trek Marlin 5 Gen 3
- ✔ Shimano CUES 9-speed shifters and cassettes
A great replacement or upgrade option for modern entry-to-mid level mountain bikes, the Shimano CUES RD-U4000 keeps shifting crisp, quiet and reliable — whether you're riding trails, paths or commuting.
- Free Shipping for Parts & Accessory orders over $150
- $15 freight for orders $149.99 and under
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