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

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

Thanks to its low-profile SHIMANO SHADOW RD design, the RD-U4000 minimises the risk of impact with obstacles and improves chain stability on rough terrain. Its optimised geometry and reinforced spring tension effectively reduce chain skipping whilst ensuring a quiet and comfortable ride.

Designed for versatile use, this Shimano CUES rear derailleur is compatible with 11-41T to 11-46T cassettes and has a total capacity of 35 teeth. Its medium GS cage effectively absorbs drivetrain variations whilst maintaining excellent gear-shifting precision. Compatible with e-bikes (E-Bike -Rated), it also meets the demands of modern e-MTBs and utility bikes.

Manufactured from a robust blend of steel, aluminium and reinforced composite materials, the RD-U4000 ‘ Shimano ’ offers excellent durability even under intensive use. It is compatible with Shimano LINKGLIDE / HG 11-speed chains designed for the CUES ecosystem, ensuring a more durable and wear-resistant drivetrain.

Technical specifications

FAQ – Shimano CUES RD-U4000

Is the Shimano RD-U4000 compatible with a standard 9-speed Shimano drivetrain?

No. The Shimano CUES system uses a specific LINKGLIDE cable pull, which differs from older Shimano 9-speed groupsets. It must be used with CUES/LINKGLIDE-compatible shifters.

Can this derailleur be used on an e-bike?

Yes, the RD-U4000 is certified as “E-Bike Rated” by Shimano and is perfectly suited to the demands of e-bikes.

Which cassette should be used 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 CUES-compatible LINKGLIDE or HG 11-speed 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 riding, trekking and city bikes.