very competitive 150w small motor 4 inch hub motor

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  • Model: HB4GL
  • Price: USD105

4″ small hub motor, the smallest motor we have now, only 1.3kg. It is 150w, GEARLESS, DC brushless motor  speed range from 10 km/h to 25 km/h. Currently, we have updated this motor with encoder for robots.

To buy it via paypal here

Dropout size 60mm. If you need a controller with this  motor, you could have a try this one

The standard version 24v 120w, 15km/h, 36v 150w,20km/h, if you need a different speed, we can customize it for you. Here is 24v curving and  HB4GL 36v testing data

4 inch small hub motor
4 inch hub motor
4 inch hub motor drawing

Can this small 4 inch motor be made in mono shaft version? Yes, it can.

74 responses to “very competitive 150w small motor 4 inch hub motor”

  1. Hello, I ma looking to use this motor as a human powered generator.
    What is the RPM per volt? can it be modified?
    What options are there for mounting a drive gear

  2. Hi,
    Can this Motor be used without a controller? For example with a small Battery directly connected to the Motor via an on/off Switch?
    Best regards

  3. Hello,

    Can you say which batteries I have to use with this motor in order the best performance : speed and longevity?


  4. Hello! Can I hook this hub motor up to regular hoverboard circuitry? Those hub motors are usually rated at 300W, but I’m looking at your test data, and it looks like this 4″ Hub motor can handle up to 500W. If it can’t handle that, then can I connect this hub motor to the kids version of the hoverboard? Those motors are rated at 150W.

  5. Hello,

    can you please provide the type and manufacture of the hall sensor you build in this motor.

    Thanks a lot +
    with kind regards Matthias

  6. Hello!
    We are currently prototyping a mobile robot base and are considering using your motor. Please send as much and detailed information as possible (delivery, data sheet, etc) to my email adress.
    Thank you and best regards,
    Michael Koller

  7. Hi,
    Can you modify this motor to run at 350 rpm? What would be the maximum torque then?
    And what is the maximum output torque for the current configuration?
    Also, is this tire solid or inflated with air?

    Thank you

  8. I would like to make a small mid motor on my tandem only for hill climbing.
    150watt power would be enough if it was geared to run at between 10k to 15k to help 2 tired pensioners
    get up some of our Cornish hills.
    The motor has to be strong enough as well as reasonable quiet – we do not need to disturb the wild life.
    I propose to have a clutch system to engage as required and probably two small water bottle type batteries
    that I could charge at home, in the car or in an overnight stop at a hotel or campsite.
    I would like to build this in my workshop, so the motor should be robust enough, low cost and easy to
    repair and not heat up too much when hill climbing. On the flat the tandem would be pedaled as normal with
    the electric motor out of gear.
    Looking forward to your reply

  9. Is it possible to controll the motor without cable, by means of a wireless remote control?
    If yes, do you provide the remote controller?
    Thanks a lot

  10. Hi,

    Is it possible to have this hub motor build to the sizing of a rollerblade wheel. Either 100mm or 110mm in diameter?

    Also what is the fastest possible to make it in? Would be great if could get close to 40km/h (kph)

    Thank you

  11. Hi,
    I am really interested in this kind of motor but not destined for a scooter. Can it also go reverse?
    Thanks in advance,

  12. Hello. In the table given test, it is also be controlled to more than 500watt, is usable in such power for a few seconds?

  13. Can you please send me a technical documentation for this motor, as well as the reference of an adequate controller (with documentation as well) ?

  14. Dear uumotor Team
    Have a question regarding this engine?
    Can this also be built for a speed of 2 to 8 km / h?

    Thank for a feedback


  15. Hello,

    What is the Maximum Loading Capacity of the motor? Which weight can the driver have?
    It would be great if you could send me the technical specifications!


  16. Dear sir,
    pls send your full technical information and the sspecific prices for the motor and a suitable controller with thumb throttle.
    Tks & B.R.

  17. Hi!
    This motor looks pretty good. But i can’t find its weight, can you please tell me the weight of 24V version without package?

  18. Hello,

    can i drive the HB4GL 4″ Hub with 48V 300W?
    what is the highest current Volts/Watts i can Drive?

    Thanks for answer,


    • Hello Patrick,

      For this motor it is very small, the max power we have now is rated power 150w. To drive it under 48v, it is not good for the motor life.

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