QS 3000W 138 70H electric mid drive motor and controller kits for electric motorcycle

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$452.00 / Set | 1 Set (Min. Order)
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15 day(s) after payment received
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Quick Details
Place of Origin:
Zhejiang, China (Mainland)
Brand Name:
Model Number:
Mid drive motor
ISO9001, CCC, CE
Product Name:
QS high turque 3000W 138 70H mid drive motor for electric motorcycle
72V as default(48v-72v)
Output Power(W):
electric scooter/e-bike/e-motorcycle
Mid drive motor
Rim Size:
12-20 Inch
Waterproof Grade:

Packaging & Delivery

Selling Units:
Single item
Single package size: 
34X34X33 cm
Single gross weight:
16.0 kg
Package Type:
Carton Box
Picture Example:
Lead Time :
Quantity(Set) 1 - 10 >10
Est. Time(days) 15 To be negotiated

Quanshun 72V 3000W 138 70H electric bike mid drive motor


For 138 3000W mid drive motor, it could be used for electric scooter, electric motorcycle.

It could be 72V 100KPH, only avaiable for 12inch wheel kits (We might make bigger wheel & more powerful motor in near future.)


We also could provide you 1000w 90 mid drive motor and 2000w 120 mid drive motor.


At the same time, it also can use with gear chain.


Kits including

1*QS Motor 3000W 138 70H Mid Drive Motor

1*Voltol EM 150SP 


QS Motor Specification


  • Item: QS Motor 3000W 138 70H Mid Drive Motor
  • Motor Type: BLDC Permanent Magnet Inner Rotor Motor With Hall Sensor
  • Brand: QS Motor,QSMOTOR
  • Motor Design: Single axle 
  • Matched Wheel: 12inch Wheel (as default)
  • Magnet Height: 70mm, 40pcs, 5 pole pairs
  • Diameter of stator: 138mm
  • Rated Power: 3000W (peak power, pending) 
  • Rated Voltage: 72V as default
  • Speed: 100KPH 
  • No-load rpm: 3800rpm without flux weakening, 6000RPM with flux weakening.
  • Max Torque: approx 56N.m without Reduction ratio, approx 223N.m with 1:4.77 Reduction ratio  
  • Reduction ratio: 1:4.77 (as default)
  • Max Efficiency: pending
  • Continuous Battery Current: pending (72V)
  • Peak Battery Current: 120A (72V)
  • Suggest Peak Phase Current: 450A
  • Thermic Probe: None as default (KTY83/122 is available for mass production).
  • Working Temperature: pending
  • Single Hall Plate with waterproof connectors
  • 16mm² Cross Section of Phase Wire (not include insulation layer)
  • Hall Sensor Phasing angle: 120 degree
  • Waterproof Grade: IP54
  • Color: Black 
  • N.W./G.W.: Pending   Package Dimension: Pending/piece  

Pictures Show



Drawing(for normal)





1). Very Easy connect

2). Can match with almost brushless DC motor

3). Soft start can be adjusted

4). Programmable by bluetoot



Performance Test


basic RPM



With flux weakening



With belt ratio 1:4.77



How to Recommend you suitable motors? 

Firstly, To customize a suitable electric hub motor for your vehicle, could you please inform the points in below?

1. E-bike, E-scooter, E-tricycle or E-car? 

2. Weight of vehicle with battery, loading weight (weight with load only)? 

3. Tire model/diameter? 

4. Rated voltage and wattage of motor, nominal speed/top speed, and climb angle or torque @ what speed? 

5. Battery nominal voltage, peak voltage, capacity and vehicle range? 

6. What's the drop-outs/rear fork width of your frame?

Within your details information, we could make assessment and calculation accordingly for your project


Company Information

 About US

SIAECOSYS is an union of manufactories in electric driving industry, and belongs to Taizhou SIA Trading Co., Ltd that set from QS Factory in 2013 year.

Currently, more than 80 top factories join SIAECOSYS, and they are willing to provide customized products and service for international customers who has passion in e-scooter/tricycle/car industry.

SIAECOSYS focus on organizing member factories together to customize specific e-driving system solution and products for different requirements from customers in the world.

Nowadays, SIAECOSYS has more than 5000 customers from the world and more than 40 customers send inquiry every day.

SIAECOSYS has sale department, Technology department, Quality inspection department, general accounting department, purchase department and after-sale service department.



Q1. Are you trader or manufacture?

A: We're manufacture.


Q2. How long is your production time?
A: Generally, the production period is 12-14 working days(6 working days per week).

The specific delivery time depends on the items and the quantity of your order.

Q3. How long is your warranty time?

A: For motor, the warranty time is one year and three months. For other parts, the warranty time is one year.


Q4. About Customs Clearance

For some special countries with strict customs for import, so pls. confirm it firstly to us that you have ability to do customs clearance, otherwise we will not take on heavy responsibilities for this issue, return money and goods are not support.

Special countries list:

Argentina, Brazil, Egypt, Turkey, Iran,Portugal,Romania, Kazakhstan, Ukraine, Yeman etc.

Some countries name not listed, the salesman will inform you in time if you placed the order online directly. Thank you for your understanding.


05. Does your products with CE certification?

Yes, our motor with Certification (CE, CCC), and our factory with certification of ISO9001, TS86949



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