MTB rear derailleur Shimano CUES RD-U4000 9 speed - ERDU4000GS

The Shimano CUES RD-U4000GS 9-speed rear derailleur is designed to provide a reliable, smooth and durable drivetrain for cyclists looking for high-performance equipment for mountain biking, trekking, gravel or urban commuting. Developed around Shimano CUES technology and compatible with LINKGLIDE 1x9 speed drivetrains, this model guarantees precise gear changes even on the most demanding terrain.

Thanks to its low-profile SHIMANO SHADOW RD design, the RD-U4000 reduces the risk of bumps against obstacles and improves chain stability on rough roads. Its optimised geometry and reinforced spring tension effectively reduce chain jump while ensuring quiet, comfortable pedalling.

Designed for all-round use, this Shimano CUES rear derailleur is compatible with 11-41D to 11-46D cassettes and has a total capacity of 35 teeth. Its medium GS clevis effectively absorbs transmission variations while maintaining excellent shifting precision. Compatible with electric bikes (E-Bike Rated), it also meets the requirements of modern VTTAEs and utility bikes.

Made from a robust blend of steel, aluminium and reinforced composite materials, the Shimano RD-U4000 offers excellent durability even under intensive use. It works with Shimano LINKGLIDE / HG 11-speed chains dedicated to the CUES ecosystem to ensure a more durable, wear-resistant drivetrain.

Technical specifications

FAQ - Shimano CUES RD-U4000

Is the Shimano RD-U4000 compatible with a conventional 9-speed Shimano transmission?

No. The Shimano CUES system uses a specific LINKGLIDE cable pull that is different from the old Shimano 9-speed groupsets. It must be used with CUES/LINKGLIDE compatible controls.

Can I use this derailleur on an electric bike?

Yes, the RD-U4000 is certified "E-Bike Rated" by Shimano and is perfectly suited to the constraints of electric bikes.

Which cassette should I use with this derailleur?

It is compatible with LINKGLIDE cassettes ranging from 11-41 teeth to 11-46 teeth.

Which chain is recommended?

Shimano we recommend a LINKGLIDE or HG 11-speed CUES-compatible chain, such as the CN-LG500.

Is this model suitable for gravel and trekking?

Yes, its versatile design makes it perfectly suited to leisure mountain biking, gravel, trekking and urban bikes.