17 X 4.5 inch 2000W - 8000W 273 brushless dc bldc electric motorcycle hub motor for motorcycle

$1,989.00 / Piece | 1 Piece (Min. Order)
- + Pieces available
0piecesselected, US $in total
View Details
Shipping fee:
Depends on the order quantity.
Lead Time:
12 day(s) after payment received
Contact Supplier
Report Suspicious Activity
Quick Details
Place of Origin:
Zhejiang, China
Brand Name:
QS Motor
Model Number:
Motor Manufacturer:
Taizhou Quanshun (QS) Motor Co., Ltd.
BLDC Permanent Magnet Outer Rotor Motor
Rated 8000W, Peak 12000w
Max. speed:
Electric Bicycle,Electric Scooter, Electric Motorcycle

Packaging & Delivery

Selling Units:
Single item
Single package size: 
58X58X40 cm
Single gross weight:
25.5 kg
Lead Time :

17 X 4.5 inch 2000W - 8000W 273 brushless dc bldc electric motorcycle hub motor for motorcycle


For 17X4.5inch E-motorcycle wheel hub motor, it could be used for electric scooter, electric motorcycle.

The size is same as 12kW & 14kW motor, we modify the dimension of iron ring to fit with normal 2000W-8000W hub motors.

273 motor means the diameter of iron ring/hoop of rotor is 273mm, for all 273 motor, e.g. 13inch,14inch,16inch & 17inch 273  hub motor,

etc., the configuration & performance are the same.


There are many options for the power,

It could be 2000W-8000W, even 12kW-14kW Motor, refer to below list.

Product List

PowerMagnetVersionBattery CurrentSpeed (KPH)TorquePrice 

PS. 1. Above quotation base on 17X4.5inch wheel as default, we sugges to make it above 6000W because of the big wheel.

      2. For 273 motor, the voltage is 48V~144V.

      3. Above configuration is suggested for mass production,

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

      4. For more information about 12kw-14kW motor, please refer to below hyperlink.


For the max continuous power rating

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 before.


Due to our understanding and feedback of customer,

for 205 3000W motor, the max continuous power could be 6000W, peak power 12kW (even 18kW).

For EV enthusiastic, they could input more power to enjoy the high performance, but the motor might suffer from over heating or even burnt.

For EV Manufacture, we should notice the potential performance of motor, and keep some allowance for the whole e-scooter kits.

include motor, controller, battery. to get them as stable as possible & decress the repair rate (consider all the usage environment).

E.g. 3000W as continuous rating power.


QS Motor Specification (e.g. 8000W 273 50H V3)

  • Motor Type: BLDC Outer Rotor In-Wheel Hub Motor With Hall Sensor
  • Brand: QS Motor,QSMOTOR
  • Motor Design: Double axle with 17inch moped rim (integrated)
  • Rim size:17x4.5inch(as default), Matched tire: 150/55R17, 160/60R17 etc.   
  • Magnet Height: 50mm
  • Stator: Aluminum Core
  • Rated Power: 8000W, 
  • Speed(customizable): 30-120KPH(120KPH as default), 48V-144V
  • Max Torque approix 350N.m
  • Thermic Probe: KTY83/122 (as default)
  • Max Efficiency above 88%
  • Brake type: Disc brake, PCD3*80mm-M8, CB 58mm(as default)
  • Drop-outs: 200mm
  • Dual Hall Set with water-proof connector (another set for spare)
  • 16mm² Phase Wire (not include insulation)
  • Waterproof Grade: IP54
  • Color: Grey (as default), Black

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(17X4.5), 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.


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. controllerwheel setchargerspeedometer,

throttlebrakeDC-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.

PS. for the same V1 steel/iron stator motors, QS Motor performance better on lifetime & stability becasue of good raw material. So the cost is more than normal hub motor in the market.

E.g. 1. Choose C&U bearing which is motorcycle standard, more quiet when riding.

       2. High Coil space factor, better efficiency.

       3. Silicon steel sheet 0.35mm instead of 0.5mm, less current consumption & low temp rise.

       4. Insulation varnish outside of varnished wire, max 180 ℃ than normal 120 ℃. 

       5. Better magnet, demagnetizing less than 1% than normal 3%.  


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. For the 3000W 205 50H V3 spoke hub motor, we made some 24*5T & 30*4T motor in store.

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. 


Warranty period: one year and three months (sincethe date of manufacture) or after riding 15000KM.
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. 


QS Motor Manufacture

Certification: Business License, Patent Certificatie, ISO9001 Certificate,CCC Certificate, CE Certificate, Brand Certificate.








No QS Motor, No Super EVs!

You May Like
Not exactly what you want? 1 request, multiple quotations Get Quotations Now >>
You May Like