The Shimano CUES SL-U4000 left shift lever brings smooth, predictable front shifting to the CUES LINKGLIDE drivetrain, with a single Rapidfire Plus Mono trigger that handles both up and down changes for the front derailleur.

Highlights

• Left-hand trigger shifter controlling a 2-speed front derailleur
• Rapidfire Plus Mono mechanism shifts up and down from one lever
• Optical Gear Display shows the selected gear at a glance
• Built for the Shimano CUES LINKGLIDE system
• Includes a 1800 mm Optislick inner shift cable for lighter, cleaner shifting
• Clamp band mount for straightforward handlebar fitting

Rapidfire Plus Mono shifting

The Rapidfire Plus Mono mechanism lets you shift the front derailleur both ways using a single trigger lever, keeping the cockpit simple and the action intuitive in everyday riding and on the trail.

Optical Gear Display

An easy-to-read gear position indicator sits on top of the lever, so you can confirm which gear you are in without looking down at the drivetrain.

Part of the CUES LINKGLIDE family

CUES consolidates Shimano's trail and commuting drivetrains into one cross-compatible platform. The SL-U4000 is engineered to work with LINKGLIDE front derailleurs for durable, low-maintenance performance.

Compatibility & fit

Left-hand shifter for a 2-speed (double) front derailleur. In the standard Australian setup the left lever operates the front derailleur. Designed for the Shimano CUES LINKGLIDE system and intended to pair with CUES rear derailleurs RD-U3020, RD-U4020 and RD-U4000. Mounts to the handlebar via a clamp band. A 1800 mm Optislick inner shift cable is included.