• Integrated design drive unit and 2 design variation drive unit covers
  • Optimized pedaling assist for comfort riding
  • Long riding distance
  • Lower drag torque & lower noise
  • Compact and light weight
  • Maximum assist speed set by E-TUBE PROJECT (~25km/h)
  • SYMPHOMATIC and automatic shifting for natural riding experience (with DI2 internal geared hub)
  • Quick walk / Intelligent walk assist function (with DI2 internal geared hub and rear derailleur)
  • Compatible for all brake type



Color Standard
Average weight 2.38
Remarks * Set by E-TUBE PROJECT ** By using SM-DUE10/SM-DUE11 *** Only in combination with DI2
Compatible Brake type V-BRAKE, Roller brake, Disc brake, Coaster brake
Motor type Brushless motor
Position Mid ship
Compatible Wheel Size (mm) 1,300 - 3,000
Continuous Rated Power (Watt) 250
Maximum torque (Nm) 40
Rated Voltage 36 V DC
Assist mode_HIGH
Assist mode_NORMAL
Assist mode_ECO
Power supply for front light 12 V DC
Power supply for rear light 12 V DC
Communication E-TUBE
Chain case compatible
Torque sensor
Bike speed sensor ** X
Compatible spindle type Square
Chain case compatible
Automatic shift_Internal geared hub 5-speed (INTER-5E)
Automatic shift_Internal geared hub 8-speed
DI2 compatible_Internal geared hub
DI2 compatible_Rear derailleur
Electronic shift by drive unit control
E-tube connector (pcs) 0
E-tube port (pcs) 1
Firmware update by E-tube Project
Master unit
Maximum current supply front and rear light total (A) 2
Maximum support bike speed_20 mph *X
Maximum support bike speed_25 km/h *X
Maximum support bike speed_Adjustment *X
Port for Speed Sensor (pcs)_SD50 type 1
SYMPHOMATIC_Internal geared hub
Safe way home function
Terminal for Light (pcs) 1
Walk assist function_Intelligent ***X
Walk assist function_On/Off *X
Walk assist function_Quick
Firmware update by E-TUBE PROJECT
Master unit
Position Mid ship
Port for Speed Sensor (pcs)_SD300 type 0
SD300 connector (pcs) 0
SD300 port (pcs) 0
SD50 connector (pcs) 0
SD50 port (pcs) 1