Shimano EP801
The Japanese giant focuses on compactness and integration. The EP801 impresses with its low weight and small form factor, which allows for slender frame designs. Even in 2026, the motor is still widespread, even if its age is somewhat noticeable regarding noise levels. The present freewheel rattling, in particular, bothers many E-Mountain bikers. via the E-Tube app, it is customizable in extreme detail—a favorite for tinkerers and sporty pilots.
Battery System & Chargers
🔋 Battery System
| Model | Capacity | Weight | Energy Density | Dimensions | Mounting |
|---|---|---|---|---|---|
| BT-EN-404 | 418 Wh | 2.58 kg | 162 Wh/kg | n/a | Rack |
| BT-EN-405 | 504 Wh | 2.65 kg | 190 Wh/kg | n/a | Rack |
| BT-EN-604 | 418 Wh | 2.6 kg | 161 Wh/kg | n/a | Frame |
| BT-EN-605 | 504 Wh | 2.6 kg | 194 Wh/kg | n/a | Frame |
| BT-EN-606 | 630 Wh | 3.2 kg | 197 Wh/kg | n/a | Frame |
| BT-EN-805 | 504 Wh | 3.15 kg | 160 Wh/kg | n/a | Internal |
| BT-EN-806 | 630 Wh | 3.7 kg | 170 Wh/kg | n/a | Internal |
| BT-EN-817 | 718 Wh | 4.2 kg | 171 Wh/kg | n/a | Internal |
🔌 Chargers
| Model | Current | Dimensions |
|---|---|---|
| EC-E8004 | 4.6 A | 155 x 70 x 40 |
| EC-E6002 | 1.8 A | 155 x 70 x 40 |
Power Characteristics
Shows how much power the motor delivers for a given rider input. The value shown is pure motor power, adjusted for input and drivetrain losses.
Input vs. Output: Shimano EP801
The Shimano EP801 is one of those motors that supports powerfully even at really low rider input: Only slightly over 100 watts are necessary to call up the motor output of over 550 watts. If you prefer somewhat more progressive, sporty behavior, you can reduce the support at any time via the E-Tube Project App.
Cadence Behavior
Shows the optimal RPM range.
RPM: Shimano EP801
The Achilles' heel of the EP801 is stability at cadence: While it remains stable up to around 80 rpm, we record a small dip in power at 90 rpm until the motor then virtually completely stops its support at approx. 110 rpm. This can be annoying, especially in technical uphills when such cadences are briefly necessary, e.g., to climb steps.
Thermal Performance
Shows power output performance over 15/20 minutes under constant full load.
15 min
The thermal stability of the Shimano EP801 is remarkable considering its low weight and high performance. If it reaches its temperature limit (in our tests after around 13 minutes), it reduces its power abruptly by around 15%. As soon as the temperature drops, the power rises again just as quickly. Due to this behavior, you ride with the maximum possible power for the maximum time—however, the rather sudden jumps in power are clearly noticeable while riding.