The Shimano Cues RD-U4000 Rear Mech / Derailleur GS Medium Cage 9-Speed is a durable, reliable and smooth-shifting rear derailleur designed for everyday cycling, trekking, commuting, fitness bikes and e-bike use. Part of Shimano’s versatile CUES component range, the RD-U4000 offers simplified compatibility, long-lasting performance and dependable shifting for mid-grade riding styles.
- Shimano Cues RD-U4000 9-speed rear derailleur
- GS medium cage design for single chainring drivetrains
- Durable LINKGLIDE technology for smooth, long-lasting shifting
- Up to 300% more durable than current Hyperglide drivetrain systems
- Shimano Shadow low-profile design for improved clearance
- Optimised slant angle for light and reliable shifting action
- Wide link design increases rigidity and service life
- One fluorine-coated link pin bushing
- Large 13-tooth pulleys for extended durability
- Aluminium bracket body with steel outer and inner plates
- Compatible with LINKGLIDE and HG 11-speed chains
- Suitable for 46T to 35T low sprockets
- E-bike rated for increased drivetrain demands
Built around Shimano LINKGLIDE technology, this 9-speed rear derailleur is engineered for exceptional durability and smooth gear changes. LINKGLIDE is designed to be up to 300% more durable than current Hyperglide drivetrain technology, making it an excellent choice for high-mileage riders, daily commuters and e-bike users who need a drivetrain that can handle increased wear.
The Shimano Shadow design gives the derailleur a low-profile shape for improved clearance and better protection from knocks and impacts. Its optimised slant angle helps deliver light, consistent shifting action across the cassette, while the wide link design increases rigidity and improves service life.
With large 13-tooth pulleys for longer-lasting performance, an aluminium bracket body and strong steel inner and outer plates, the Shimano Cues RD-U4000 is built to handle regular use in demanding conditions. This GS medium cage rear mech is suitable for single chainring drivetrains and offers a total capacity of 35T.
Compatible with Shimano LINKGLIDE and HG 11-speed chains, and suitable for cassettes with a 46T to 35T low sprocket, the RD-U4000 is a practical upgrade or replacement derailleur for modern 9-speed bikes and e-bike drivetrains.