20inch 500W - 1500W 205 brushless dc electric bicycle bike cast wheel hub motor

$95.00 / Piece | 1 Piece (Min. Order)
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Brushless, Brushless DC motor
> 400w
DIY, High-Efficiency
Motor Manufacturer:
Taizhou Quanshun Motor Co., Ltd
Max. speed:

Packaging & Delivery

Selling Units:
Single item
Single package size: 
34X34X33 cm
Single gross weight:
7.8 kg
Picture Example:
Lead Time :

20inch 500W - 1500W 205 brushless dc electric bicycle bike cast wheel hub motor


For 20X2.125 E-bike wheel, it could be used for e-bike, drift trike.

These are 205 hub motor, so the configuration & performance is the same as 10inch 205 Hub Motor.

Meanwhile, for 500W motor, it could also be single shaft.


Generally, the iron ring height is 35mm, it could be 27H 500W V1 hub motor.

For lastest 52mm iron ring, it could be 800W, 1000W, 1200W, 1500W hub motor.

It could be 800W 30H V1 & V2, 1000W 35H V1 & V2, 1000W 40H V1 & V2,

1200W 43H V1 & V2, 1500W 45H V1, 40H V3 (160mm dropouts).


Chinese New Year Holiday Notice

Chinese New Year Holiday is drawing near, our Produce Dept., will have 19 days off (17th Jan., to 5th Feb., 2017). We/Exporting Dept., will still work & have shorter holiday from 25th Jan., to 3rd Feb., 2017.

For normal motors, e.g. e-scooter motor, e-motorcycle, it takes 10-12 business days.

For customzide motor & single shaft motor, it takes 15-16 business days.

New orders is still acceptable. For the delievery, please kindly consider the long holiday, we will try to get the order done before the long holiday if possible.If not, the order will start after that.

Thank you for your understanding.



Best Wishes 


Product List

PowerMagnetVersionBattery CurrentSpeed (KPH)TorquePrice 
1200W43HV145A 21-5526-5532-55/$156.00

PS. 1. Above quotation base on 20X2.125inch wheel.

      2. 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. 500W 205 27H V1)

  • Motor Type: BLDC Outer Rotor In-Wheel Hub Motor With Hall Sensor
  • Brand: QS Motor,QSMOTOR
  • Motor Design: Double axle with 20inch moped rim (integrated)
  • Rim size:20x2.125inch(Narrow Tire as default), Matched tire:20X2.125,20X2.5 etc. 
  • Magnet Height: 27mm, 23 pole pairs
  • Stator: Iron Core
  • Rated Power: 500W
  • Speed(customizable): 

         48v 290~470rpm  = 25km/h~40km/h

         60v 363~470rpm = 31km/h~40km/h

         72v 435~470rpm = 38km/h~40km/h

  • Max Torque approix 72N.m
  • Thermic Probe: None (as default)
  • Max Efficiency above 85%
  • Brake type: Disc brake, PCD6*44mm(as default)
  •                    Disc Brake, PCD3*80mm (moped standard, drop-outs 200mm)
  • Drop-outs: 150mm
  • One Hall with normal connectos
  • 2mm² Phase Wire (not include insulation)
  • Waterproof Grade: IP54
  • Color: Silver Rim with Black Cover


PS. For less than 1000W motor, there is no temp sensor as default.

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.


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   


Electric Motor Kits

After confirming the motor, we could try to offer suitable motor kits, e.g. controller, charger, speedometer,

throttle, brake, DC-DC converter, etc.

PS. So far, the battery is not avaiable.


QS Motor V1/V2/V3 Type Motor

There are three types, Normal/V1 type (low cost), Export/V2 type (Cost-effective) and Extra/V3 type (Best Performance).

1. Difference between V1 & V2

Holder: Iron(V1), Aluminum (V2)

Hall: One hall with Normal connector(V1), Two halls with Waterproof connector(V2)

Stator: V2 have a stronger configuration, more cooper, thicker section surface, energy saving in usage.

Magnetic Steel Grade: V2 ≥ V1 

Efficiency:  84~87%(V1) 86~88%(V2)

In short, normal type is standard configuration, while export type is high configuration.The price differs because of the cost of raw materials.

2. Difference between V2 & V3

 The raw materials are alike, main difference in inner construction.

For V3 (16 Pole Pairs):  stronger configuration than V2, wider lamination, 
more cooper wire /thicker Cross-sectional area section, bear more current 
in usage. Higher torque at same current, lower temperature rise, more stable in high current.
Magentic Steel: V3 is wider and thicker. 
Efficiency:  86~88%(V2) 88~92%(V3); Thus, V3 have best performance.


More QS Motor Informaiton:

Optional Appearance 

Motor Details, drawing, performance curve (refer to attachment in PDF).

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



For samples, "QSMOTOR" logo is laser print on side cover as default.

Meanwhile, the logo could be customized with below essential document.

· Please provide high definition logo in jpg format.

· Brand Letter of Authorization.

· Certificate of Trademark Registration

· Please advise the position & Size of your logo on side cover.

QS Motor Steel Seal 
We could laser print it on side cover or edge of side cover.
For V3 type motors(e.g. WP20040X140607 7355)
WP= V3 type 200=2000W, 300=3000W
40 means winding X means 32 pieces magnetic steel
140607 means producting date, 07th, June, 2014. 7355, is producing serial number

For V2 type motors(e.g. QSMOTOR 48V3000W 140720 604329)
48V3000W=48V 3000W 140720 means producing date, 20th, July, 2014.
60 means rated speed, 60km/h. 4329 is producing serial number.
P.S.: We define power base on rated output power, rather than peak output power.


How to make the order

·Before-sale,  please advise which motor do you prefer, and advise above expected configuration of EV if possible.

After confirming motor, we could also advise suitable motor kits (e.g. controller).

It could be paid online, e.g. QS Motor Shop on alibaba, aliexpress;

We suggest to make the deal offline, we will make PI accordingly (latest price & accurate delivery cost).

·In-sale,  we will informe you once received the payment to start the order & ETD.

Before delivery, we will send some pictures for reference.

·After-sale,  Once got the tracking number, will informed you immediately.  

Manual and software will be sent accordingly, also we will email you after the package delivered.


Payment Term

Wire Transfer/TT, Money Gram,Western Union, Paypal 100% in advance(for sample) 
Generally, we perefer T/T, Money Gram,Western Union 100% in advance (for sample). 
Meanwhile, we could also accpet paypal. There will be extra cost for transaction fee: Total cost*4.4%+0.3

Withdraw fee: USD 35.0 (We could bear USD 35.0).
For Mass Production, we support 30% T/T in advance + 70% T/T the balance before shipment.

Produce Time

For normal motors, e.g. e-scooter motor, e-motorcycle, it takes 10-12 business days (6 business per week).
For customzide motor & single shaft motor, it takes 15-16 business days.
In busy season,  the order might be postponed. For mass production, the produce time will be increased accordingly.
PS. We're manufacture, there is no spare motors in store generally. 

Standard export packing 1. polyfoam + carton box (for sample) 2. Or according to customer's requirements


Life Time of QS Motor & Warranty of Sample
The Life Time of motor depends on usage.
For general usage, it's about 3-5 years, and it could be 5-7 years if it work in good condition.
For testing and abusing usage, the lifetime will decrease accordingly.
E.g., For 3kW V2/V3 motor, the peak power could be 6kW (2 times of rated power).
Situation 1:
We suggest peak 70-80A battery current for general usage (72V). It's most stable configuration & longest life time.
Some EV enthusiast adjust it to be 150A, the output power is far more than 6kW peak. QS Motor could also work,

which might not as stable as former situation. For a long time in high current/power, the motor might over heat & even burnt.

We strongly suggest to install Thermic Probe (e.g. KTY 83/122), so that controller will protect motor due to the temp inside of motor.
Situation 2:
The peak speed of 1pc 3kW motor is 80KPH in 72V(for e-scooter).
Some EV enthusiast adjust it to be 96V, the max speed might be 100KPH, the continuous output power is far more than 3kW rated (maybe equal to 5-6kW).

QS Motor could also work, which might not as stable as it in 72V. 
We call it over voltage/abusing usage, the life time might be shorter, and V3 will work better than V2. 

For Sample, If it's destructive test/abusing usage due to test purpose, we could not do aftersale issue for free.

If there is some damage during your test, which we could repair. 
After checking your video or pictures, we could deliver some motor parts (e.g. hall sensor) for maintenance.
Also, you could deliver them back to our factory(I'm afraid that you have to bear delivery fee, both way), 
We will make maintenance as possible as we could. For repair fee, we could bear the cost for 1 year.


No QS Motor, No Super EVs!