Peak torque
Strong low-speed support for starts, gradients and loaded urban riding.
QERYU / SC31
QERYU DRIVE SYSTEMS / SC31
Compact power. Natural control.
A compact 36 V brushless mid-drive engineered for responsive assistance, stable handling and straightforward OEM integration.
250WRated power
460WPeak power
90 N·mPeak torque
350%Max assist
20 msResponse
3.6 kgMotor weight
IPX6Water protection
< 55 dB(A)Low operating noise
24 monthsMotor warranty
PERFORMANCE
Power that follows the rider.
A high-precision torque sensor reads pedal input and delivers assistance in as little as 20 ms. The result is smooth acceleration, confident climbing and a ride that still feels natural.
Maximum assist ratio
Up to 3.5 times the rider input for effortless support when it matters.
Peak efficiency
Efficient power delivery designed for everyday range and controlled heat.
PRODUCT FILM
See the SC31 in motion.
A 24-second product view highlighting the compact housing, integrated connections and production-ready finish.
ENGINEERING
Small footprint. Serious capability.
The 114 × 117 mm housing keeps installation space under control, while the 3.6 kg motor helps system designers balance performance and vehicle weight.
Compact package114 × 117 mm body envelope
Protected connectionsIPX6-rated motor protection
Broad compatibilityCompatible with full shifting systems
BUILT FOR INTEGRATION
One platform, six practical advantages.
Torque sensing, low weight, smart connectivity and weather resistance are combined in a single mid-drive platform for commuter, leisure and light-touring e-bikes.
RELIABILITY
Engineered for everyday duty.
Designed for a 50,000 km service life, operating temperatures from -20 °C to +45 °C and quiet output below 55 dB(A). Motor warranty is 24 months; misuse and accidental damage are excluded.
TECHNICAL DATA
SC31 specifications
Confirmed engineering values are shown below. Certification projects remain in progress and are not presented as completed approvals.
Electrical
- Model
- SC31
- Motor type
- Brushless DC mid-drive (BLDC)
- Rated voltage
- 36 V
- Rated / peak power
- 250 W / 460 W
- Rated / peak current
- 7 A / 13 A
- Peak torque
- 90 N·m
- Maximum assist ratio
- 350%
- Assist cut-off speed
- 25 km/h
- Crank output speed
- 110 RPM
- Peak efficiency
- 83%
Sensing & control
- Assist levels
- 3
- Sensor
- Torque sensor
- Assist response
- 20 ms
- Cadence detection
- 48 RPM
- Communication
- UART
- Connectivity
- NFC / App / Bluetooth
- Firmware update
- Offline update supported; OTA not supported
Physical & reliability
- Motor weight
- 3.6 kg
- Dimensions (D × L)
- 114 × 117 mm
- Water protection
- IPX6
- Operating temperature
- -20 °C to +45 °C
- Noise
- < 55 dB(A)
- Design life
- 50,000 km
- Drivetrain compatibility
- Compatible with full shifting systems
- Warranty
- 24 months
Compliance status
- CE / EN15194
- In progress
- UL2849
- Pending certification
- CCC / GB17761
- In progress
- RoHS
- Pending certification
Technical values are based on internal laboratory testing. Actual performance may vary with vehicle configuration, rider load, terrain and temperature. Certification status should be reconfirmed before publication or sale.
