The Shimano CUES RD-U6070 is an electronic Di2 rear derailleur built specifically for e-bike commuters and urban riders who want reliable, effortless gear changes without the complexity. Designed around Shimano's LINKGLIDE drivetrain system, it delivers smooth, near-imperceptible shifts under high torque loads — right where e-bike riding demands the most from a drivetrain.

Highlights

• Di2 Electronic Shifting: Instant, precise gear changes at the push of a button — no cable stretch, no tune-up drift.
• LINKGLIDE Technology: Re-engineered chain and cassette interface with thicker tooth bases and a unique chamfer that dramatically improves wear resistance under the sustained high-torque loads typical of e-bike use.
• Free Shift Mode: Change gears without pedalling — so you're always in the right gear when you set off, even at a standstill.
• Automatic Shifting Compatibility: When paired with Shimano STEPS e-bike systems, the drivetrain can shift automatically based on speed and cadence, so you stay focused on the ride.
• SHADOW RD: Low-profile, inward-facing design resists mud, debris and trail chatter for consistently quiet, stable performance.
• SD300 Port: Single wired Di2 connection keeps the build clean and integrates with Shimano's E-Tube Project ecosystem for firmware updates and custom configuration.
• Status LED: Built-in indicator gives instant system feedback so you always know the derailleur is powered and ready.

LINKGLIDE Durability

LINKGLIDE is Shimano's drivetrain standard engineered from the ground up for the high-torque, high-frequency shifting environment of e-bikes. The cassette teeth feature a substantially thicker base and a precision chamfer that extends wear life far beyond conventional drivetrains. The result is fewer replacements, longer smooth-shifting life, and reduced total cost of ownership — exactly what daily commuters and cargo riders need.

Di2 Integration

As a fully electronic component, the RD-U6070 connects via Shimano's EW-SD300 wired Di2 port and is configurable through the E-Tube Project app. Firmware updates, shifting feel customisation, and Free Shift mode settings are all managed wirelessly from your smartphone. The hollow B-axle construction keeps weight in check, and fluoric-coated link bushings ensure long-lasting smooth movement.

Compatibility & Fit

The RD-U6070 is designed for 1x11-speed LINKGLIDE drivetrains only — it is not compatible with non-LINKGLIDE cassettes or mechanical shifting systems. Mounts via direct attachment (conventional derailleur hanger). Compatible with LINKGLIDE 11-speed cassettes: CS-LG700-11 (11-45T) and CS-LG400-11 (11-50T), with a maximum low sprocket of 50T and total capacity of 39T. Integrates with Shimano EP6 (EP600) and EP8 (EP800) STEPS e-bike drive units for Auto Shift and Free Shift functions. Cage length: GS (medium).