QS Motor 4000W 273 V3 100kph peak brushless dc electric motorcycle spoke hub motor

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Product Overview


QS Motor 4000W 273 16kW peak brushless dc electric motorcycle spoke hub motor


For 205 spoke hub motor, it could be used for motorcycle, high power electric motorcyle.

205 motor means the diameter of iron ring of rotor is 205mm, for all 205 motor, e.g. 10inch & 12inch 205 e-scooter hub motor, 205 spoke hub motor, 10inch & 12inch 205 single shaft hub motor, etc., the configuration & performance is the same as 10inch 205 Hub Motor.


It could be  Standard & Moped Standard.

1.Motorcycle Standard, Disc Brake PCD3*80mm, Dropout 200mm.

 273 1.jpg



Table of contents

1. Comparing wheel hub motor with gear differential motor

2. QS Motor notice(Producing time/Warranty/Package/Certidication etc.)

3. QS Motor 273 3000W-8000W Brushless DC Motorcycle spoke Wheel Hub Motor List

4. Products description(SPEC, appearance, drawing)

5. Buying guides(How to find a suitable motor)




1. Comparing Wheel Hub Motor with Gear Differential Motor 

1). Simplify to make a electric-car. Gearbox, transmission shaft, clutch are no need. Which save space.

2). It could be installed in wheels, and easy to be hybrid car.

3). Easily to make 4-wheel drive, which could spot turn. 

4). Support regenerative braking

5). High efficiency: 85~92% 


2. QS Motor Notice Before Order (Producing time/Warranty/Package/Certidication etc.) 

Pls. click below hyperlink of picture.




3. QS Motor 273 3000W-8000W Brushless DC Motorcycle spoke Wheel Hub Motor List

 273 spoke 200mm motor.jpg

PS. 1. Above quotation base on 273 electric spoke hub motor.

      2. For 273 motor, the voltage is 48V~96V.

      3. Above configuration is suggested for mass production,

for EV enthusiast, V2 & V3 motor could be over-voltaged to gain more speed (customizable).


QS Motor Specification (e.g. 4000W 273 40H V3)

Item: QS MOTOR 4000W 273 40H V3 BLDC Electric Bike Bicycle/Motorcycle Spoke Hub Motor

  • Motor Type: BLDC Permanent Magnet Outer Rotor In-Wheel Hub Motor With Hall Sensor

  • Brand: QS Motor,QSMOTOR

  • Motor Design: Double axle without rim (not integrated), 36 spoke holes, OD 4.2mm 

  • Matching Rim size: 24inch, 26inch E-Bike Wheel, 17inch, 18inch, 19inch moped wheel.

  • Magnet Height: 40mm, 16 pole pairs

  • Stator: Aluminmum Core

  • Rated Power: 4000W 

  • Rated Voltage: 72V as default (48V-96V, optional)

  • Speed: 80KPH as default (24-120KPH, optional) 

  • kV: 11.46/12.46/13.54/15.69/17.71etc.

  • Max Torque: approx 182N.m

  • Max Efficiency: 86-91%

  • Continuous Battery Current: 55A (72V)

  • Peak Battery Current: 111A (72V)

  • Suggest Peak Phase Current: 196-245A (depend on the kV)

  • Thermic Probe: KTY83/122 (as default, optional)

  • Working Temperature: 70-120℃ , peak 150 ℃ 

  • Brake type: Bike Disc brake, PCD3*80mm(as default)

  • Drop-outs/Rear Fork Width for installation: 200m

  • 14mm axle flats

  • Dual Hall Set with waterproof connectors

  • 10mm⊃2; Cross Section of Phase Wire (not include insulation layer)

  • Hall Sensor Phasing angle: 120 degree

  • Waterproof Grade: IP54

  • Color: Black (as default), White/Luminous (extra $5.0)

  • N.W./G.W.: 18.2kg/20.0kg  

  • Package Dimension: 43cm*43cm*41cm/piece

Btw., someone may call it 5000W or 6000W rated hub motor, it's the same.

For the max continuous rating power, the data should be tested in lab, which means no further temp rise at the power (e.g. 100 degree inside of motor at the power). Unluckly, all the continuous power rating is not done yet.


PS. Temp Sensor Options: KTY84/130, KTY83/122, 10K@25C NTC(model MF58-103F3950).

QS Motor could work 120 ℃ in half an hour without damage. 

Suggestion (Setting of Controller)
When it's 130 ℃ inside of motor (in 30s), the current should be limited 50%.

When it's 150 ℃, the controller shut down. When it drop down to 110℃, the controller work again. 


More QS Motor Informaiton:

Optional Appearance 

Motor Details, drawing, performance curve/test report are available.

For more information, please feel free to contact with us. 



Buying Guides


How to find suitable hub motor

To customized a suitable motor, could you pls. inform below points: 

  • 1.E-scooter, E-tricycle or E-car, tire model? 

  • 2.Volt and wattage of motor, Speed(kV), and torque/climb angle ?  

  • 3.Your vehicle weight and loading weight?  

  • 4.Lithium or lead-acid Battery?  

We could suggest most suitable motor accordingly, thank you for your cooperation. 

PS. To calculate the speed, v(km/h)=n(r/min)*2rπ(m)*60/1000,   n=load RPM, r=tire radius.

For speed less than 100KPH, consider the Windage Resistance & Rolling resistance.

the load RPM is appr 0.9 * no-load RPM. v(km/h)=0.9*n(r/min)*2rπ(m)*60/1000    

For over 100KPH,  V=0.85*RPM*2rπ*60/1000   




273 1.jpg

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