High Torque 17 X 4.5inch 12kW - 14kW 273 brushless DC water cooled electric In wheel hub motor for motorcycle

$1,989.00 / Set | 1 Set (Min. Order)
- + Sets available
0piecesselected, US $in total
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Shipping fee:
Depends on the order quantity.
Lead Time:
40 day(s) after payment received
Customized logo (Min. Order: 1 Sets)
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Quick Details
Place of Origin:
Zhejiang, China
Brand Name:
Model Number:
BLDC Motor
Output Power:
Electric scooter/motorcycle
Gearless motor
Permanent Magnet
Protect Feature:
Continuous Current(A):
Motor Manufacturer:
Taizhou Quanshun Motor Co., Ltd., QS Motor
BLDC Permanent Magnet Outer Rotor Direct Drive Hub Motor
Max. speed:
Silver & Black
DIY, Two Halls, High-Efficiency
Cooling System:
Watercooled or Olicooled

Packaging & Delivery

Selling Units:
Single item
Single package size: 
60X60X42 cm
Single gross weight:
53.0 kg
Package Type:
Lead Time :

High Torque 17 X 4.5inch 12kW - 14kW 273 brushless DC water cooled electric In wheel hub motor for motorcycle


Many Customers ask us for the 14kW, 12kW Motor, as the old mould is opened for another customer (the cost is very expensive). 

Now, the new 17"X4.5" mould is ready, it could be 12kW 273 70H, and 14kW 273 80H.

The mould is made for water cooled version. It could also be customized to be air cooled.

Please note the wheel, two side covers, stator are all new mould, not made by hand.

So this is the most poweful QS Motor hub motor, ready for mass production.


It could be 12000W 70H V3 Water cooled & Air Cooled, 14000W 80H V3 Water Cooled & Air Cooled.

Product List

12000W70HV3Air Cooled$1,639.00
70HV3Water Cooled$1,839.00
14000W80HV3Air Cooled$1,789.00
80HV3Water Cooled$1,989.00

Production Period: 30-40 business days.


QS Motor Specification

PS. Minmum Dropout 280mm. 

For 14.5kV, the winding is 3 X (28X6T) in parallel, equal to 17.13mm² per turn. Phase Wire, to be determined.


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.

17X4.5inch 12kW 273 70H Water Cooled Hub Motor (Silver)




17X4.5inch 14kW 273 80H Air Cooled Hub Motor (Black)




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.


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. 




Suitable KITS

Disc plate and rear brake system could be offered, the price below for your reference.

Please ask the sell for them if you need.

Disc Plate: USD27.00/piece

Rear brake system(Benelli BM600S original): USD160.00/set

(The kits picture below for your reference).


No QS Motor, No Super EVs!