QS Motor 1000W 205 35H V1 135mm dropout 7 speed freewheel electric bike bicycle brushelss dc spoke hub motor for bicycle

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QS Motor

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1000W 205 35H V1 135mm dropout 7 speed freewheel electric bike bicycle brushelss dc spoke hub motor for bicycle

We/QS Motor developed 135mm spoke hub motor 350w-1000w (25H-35H) for sale now.

Power Range optional: 

- 350W 25H V1

- 500W 27H V1

- 800W 30H V1

- 800W 30H V2 (For this type motor, we will open new mould in the near future.)

- 1000W 35H V1

- 1000W 35H V2 (For this type motor, we will open new mould in the near future.)

Drop-outs optional:

- 135mm dropouts for 7 speed freewheel rear wheel

- 110mm dropouts for front wheel without freewheel


The 1st batch motors estimated to ready on 20th June, 2017(that’s means we will have 50pcs 205 35H V1, 6T 8.54kV motor in store at that time), so it's for sale now.

For 2nd batch, it will be available 25 days after then. 


Meanwhile, we have various combination products for your choice. You could click the hyperlink to purchase it.


For More details of motor, pls. refere to below information.

1. QS Motor Specification                                                                                                      

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 3.4mm 

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

Magnet Height: 35mm, 23 pole pairs

Stator: Steel Core

Rated Power: 1000W (2000W peak in few seconds) 

Rated Voltage: 60V as default (48V-96V, optional)

Speed: 45KPH as default (24-120KPH, optional) 

kV: 7.3/8.5(as default)/9.2/10.4/11.9/12.9/18.8

Max Torque: approx 100N.m

Max Efficiency: above 87.3%

Continuous Battery Current: 20.8A (60V)

Peak Battery Current: 41.5A (60V)

Suggest Peak Phase Current: 89-112A (depend on the kV)

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

Working Temperature: 70-120℃ , peak 150 ℃ 

Brake type: Disc Brake, PCD6*44mm for bicycle

Drop-outs/Rear Fork Width for installation: 135mm

37.5mm english thread length for 7 speed freewheel

10mm axle flats

One Hall Set with waterproof connectors

3mm² Cross Section of Phase Wire (not include insulation layer)

Hall Sensor Phasing angle: 120 degree

Waterproof Grade: IP54

Color: Black (as default)

N.W./G.W.: 8.04kg/9.45kg  

Package Dimension: 34cm*34cm*33cm/piece


More winding for choose, sample order only support 6T winding, if you want to try other data, MOQ order should be 50pcs.


2. Advantage

Add Thermic Probe to protect motor from overheating.

0.35 laminations for better efficiency (instead of 0.5mm).

Improve paiting quality to avoid scratch.

Change new security Torx screw, for CE certification (not cut someone when touch it).

Optimizing structural design


QS Motor VS Crystalyte Motor



3. Drawing

135mm droputs for 7sp freewheel rear wheel, updated on 2017.5.5

110mm droputs for front wheel, updated on 2017.6.6


4. Test Report 

For Speed: Winding 6T, 410RPM at 48V, equal to 8.54kV  

Suggest setting,

48V 52A battery current, 112A Phase Current 

60V 41.7A battery Current, 112A Phase Current

72V 34.7A battery Current, 112A Phase Current 

For completed test report, pls. ask sales to send it to you directly.


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.


5. Controller Recommendation

We suggest Sine Wave Kelly Controller, QSKLS48121S for 48V, QSKLS7212S for 72V & 60V.

KLS4812S, USD 119.0/piece for sample.

KLS7212S, USD 143.0/piece for sample.

Bluetooth Adaptor, USD 8.0/piece for sample.


If you prefer Square Wave Yuyangking controller, we suggest QSYK7250J (50A/150A) in new customized design with temp sensor function. 

QSYK7250J, USD 50.0/piece for sample.

Bluetooth Adaptor, USD 18.0/piece for sample.


6. For Freewheel

We suggest SHIMANO MF-TZ21, it's 7 speed freewheel.


7. Electric Bike Conversion Kits

More Kit, e.g. Motor Controller, Wheel Rim, Throttle, Freewheel,Charger are avaiable.


8. Application and More power motors list

QS Motor spoke hub motor 500w to 3000w

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


9. More QS Motor Informaiton:

Optional Appearance, drawing, performance curve/test report are available. Please contact with sales directly.


PS. For delivery cost, please contact with us if it's not reasonable.

We will modify it after place the order on-line (before payment).

When place the order online, please leave the message about the KV and your E-mail address. (For how to choose the KV, please feel free to contact with us. E-mail used for details confirm)


A Positive Feedback and 5-STAR rating from our customers are greatly appreciated.

If there should be any troubles please contact us. Please DO not leave a neutral or negative feedback. The distance is quite far and troubles caused by shipping companies etc. can happen sometimes. In this case please don’t worry. There is always a good solution to solve such situations and we will give our best to help, because we want to keep our valued customers.


No QS Motor, No Super EVs!

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