The Shimano STEPS DU-E5100 is a lightweight, quiet mid-ship drive unit built for urban and lifestyle e-bikes. At just 2.4 kg and producing 50 Nm of smooth torque, it delivers natural-feeling assistance that makes city commutes, neighbourhood errands, and recreational rides noticeably easier — without adding unnecessary bulk to the bike.

Highlights

• 50 Nm maximum torque: confident, natural assistance for urban climbs and daily riding demands.
• Lightweight at 2.4 kg: compact motor keeps the bike responsive and easy to handle.
• Three assist modes — Eco, Trail, Boost: dial in the right level of support for any ride, road, or weather condition.
• E-TUBE PROJECT Cyclist app: fine-tune assist output, monitor system health, and update firmware via Bluetooth from your smartphone.
• Auto Shift compatible: pairs with internal hub gear (IHG) drivetrains to trigger automatic gear changes at the right moment.
• Walk assist function: operates at up to 6 km/h to help manoeuvre the bike on foot.
• Broad brake compatibility: works with disc, V-brake, roller brake, and coaster brake systems.
• 36 V system: compatible with Shimano STEPS internal batteries in 418 Wh, 504 Wh, and 630 Wh capacities.

Natural, Quiet Performance

Designed with urban riders in mind, the DU-E5100 prioritises a smooth, quiet power delivery that blends naturally with your own pedalling effort. Whether you're navigating city traffic, tackling a loaded cargo run, or simply making the morning commute less demanding, the motor responds intuitively to your input. The three assist modes — Eco, Trail, and Boost — can each be personalised through the E-TUBE PROJECT Cyclist app, with up to 15 customisable modes available, so the assist profile always matches how you ride.

Smart City Integration

Bluetooth connectivity via the E-TUBE PROJECT Cyclist app puts firmware updates, system diagnostics, and personalised assist tuning in your pocket. Riders using internal hub gear drivetrains benefit from the Auto Shift function, which automatically shifts at optimal moments — reducing the need to think about gearing while focusing on the ride ahead. A walk assist function makes pushing the bike through tight spaces or up kerbs effortless.

Compatibility & Fit

The DU-E5100 uses a mid-ship (bottom bracket area) mounting position. It is rated for 36 V Shimano STEPS battery systems — compatible internal batteries include 418 Wh, 504 Wh, and 630 Wh options. Brake system compatibility covers disc, V-brake, roller brake, and coaster brake. Pairs with the Shimano SC-EN610 display unit. Sold as an individual pack (drive unit only — battery, display, and cabling sold separately). Confirm frame compatibility and full system fitment with your local Shimano dealer or bike builder before purchasing.