The Shimano EP801 sets the benchmark for natural, confident power on the trail. With 85 Nm of smooth, predictable torque and a lightweight 2.6 kg magnesium drive unit, this premium mid-drive system rewards consistent pedalling technique with the kind of traction-first assist that makes technical climbs feel effortless without ever overwhelming the rear wheel.

Highlights

• 85 Nm maximum torque with smooth, progressive power delivery
• Lightweight magnesium drive unit at just 2.6 kg
• Shimano Di2 integration — Auto Shift and Free Shift functionality
• Three configurable assist modes: Eco, Trail, and Boost
• Deep customisation via E-TUBE PROJECT Cyclist app (up to 15 fine-tune levels)
• SC-EM800 colour display with wireless bar-mounted remote (EM800-L)
• Compatible with 504 Wh (BT-E8035-L) and 630 Wh (BT-E8036) integrated batteries
• Walk assist function included

Performance & Ride Character

Built specifically for eMTB use, the EP801 is tuned to feel like an extension of your own pedalling rather than an intrusive electric push. Power builds progressively across a wide cadence range, making it especially effective on technical singletrack where traction management is critical. The magnesium housing keeps the centre of gravity low and compact, preserving the handling dynamics of your frame.

Di2 Integration & Smart Connectivity

Pair the EP801 with Shimano's Di2 electronic groupset to unlock Auto Shift — the system adjusts gearing automatically based on your cadence and speed — and Free Shift, which lets you change gears even while coasting or stopped. The motor connects via CAN and ACC ports for expanded system integration. All ride parameters are configurable through the E-TUBE PROJECT Cyclist app, letting you dial in each assist mode and save two separate rider profiles.

Compatibility & Fit

The EP801 drive unit is designed for frame-integrated eMTB builds and requires an EP801-compatible frame. It pairs with Shimano's BT-E8035-L (504 Wh) and BT-E8036 (630 Wh) integrated batteries. The system uses the SC-EM800 cycle computer display and EM800-L bar-mounted remote. Di2 Auto Shift and Free Shift require a compatible Shimano Di2 rear derailleur. Consult your frame manufacturer to confirm EP801 compatibility before purchase.