Two Brushless Outrunner Electric Motors

LaGrange L1 electric skateboards are designed to be powered by a single brushless outrunner electric motor. These motors are typically used for large scale model airplanes but they work great for electric skateboards because they have high torque and low rotational speed. The motor is not included in the DIY kit and must be purchased separately from a hobby store. This article describes what to look for and consider when selecting a motor to power your electric skateboard.

 (Note: Hyperlinks are supplied as references and are not affiliated with the author or RRBS.)



 The motor you select must have:

1)      8mm shaft diameter

2)      44mm bolt spacing (sometimes called 32mm). See figure 1 for motor mount dimensions.


The motor you select should fit the following requirements:

 1)      Be of high quality

 2)     Recomended maximum of 63mm in diameter. Again, see figure 1 for motor mount dimensions. (Note: A motor’s dimensions are often listed in its model number. For example, a "6354" motor like this one is 63mm in diameter and has 54mm long body)

 3)      KV value in the 200 to 300 range.

KV Value Explained: A motor’s KV value is measured in RPM/Volt and it is used to determine the motor’s maximum RPM at a specific voltage. For example, If you’re running a 24v system with a 100KV motor, it would spin at 2400RPM at full throttle (no load). A low KV motor will produce higher torque and lower speed while a high KV motor will have a higher top-end at the expense of decreased torque.


Other considerations:

1)     Motors come with different types of wires (also known as motor leads) that plug into your ESC. Some motors have wires that are bendable like a noodle while others have rigid wires that hold their shape when bent. The flexible wires are ideal because the stiff wires tend to break after enough fatigue. If your motor has stiff leads, consider soldering flexible wire extensions onto the ends of the motor leads as seen in this photo.

2)     Speaking of motor leads, keep in mind that you will likely have to solder plugs (electrical connectors) onto your leads to match the plugs of your ESC. Be sure to order some plugs for the motor leads if your ESC does not include them. If you are inexperienced in soldering, go to a hobby shop and have a technician solder these on for you.

 3)    Look for motors with large high-quality main bearings – also check to see if you can get replacement bearing sets so you can rebuild your motor if the bearings wear out.

 4)    Bigger IS better - The bigger motors tend to have larger main bearings, and thus they tend to be considerably more durable. And since you can adjust your power and top speed with your ESC, a bigger motor is a good choice so you can tune it down as a beginner and have room to grow as your skills improve. Negatives include higher cost and heavier weight.



(Note: RRBS and the author have no affiliation with these brands or vendors. These motors are shown as examples.)

There are lots of choices out there, but in general, I recommend a 6364 size outrunner at 245kv like this one. This motor powers a LaGrange skateboard to 26 MPH (using a 20 cell NiMH battery and 74mm wheels).

I also like this 6354 motor. It is very quiet and at 260kv it is slightly faster than the 6364 but has less torque for climbing the big hills.

I personally use the SK3 series from Turnigy. Any one of these motors in the 200-300KV range should work. (Note to skaters in the USA: Be sure to buy the motors when they’re available in the US warehouse so you can avoid the international shipping costs)


Additionally, here are some other motors that I’d like to try:

 Turnigy G160 Brushless Outrunner 290kv (160 Glow) (USA Warehouse)

 Great Planes Electrifly RimFire 1.60 63-62-250 Brushless Outrunner Motor (250kV)

 E-flite Power 160 Brushless Outrunner Motor (245kV)


I hope this helps you in designing your electric skateboard. Feel free to ask questions and comment below.


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  • Aaron King

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  • Guest (Anthony Sortino)

    I apologize for asking such a novice question but, how can a motor rated for a 10s battery pack (37V) run off of a 24 volts? Again, I know nothing about this stuff. Starting at the very bottom.

    from Nanuet, NY, USA
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  • Aaron King

    In reply to: Guest (Anthony Sortino)

    Good question. That rating is the maximum voltage that it can handle. You would get more speed, power, and efficiency if you go with a higher voltage battery but it can be difficult to find speed controllers (ESCs) that can take the higher voltage.

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  • Guest (Anthony Sortino)

    Referring back to the specs of the motor:

    The amp rating is 70A. The max power is 2700 watts. With a 37V battery, that can be written as 2700 watts / 37V = 72.9 Amps, and you choose an ESC that can handle 10 - 20% more amps than the motor could ever draw.

    But what happens when you go with 24V instead of 37? What about these numbers changes, and how do you go about picking your ESC then?

    Thank you for your help.

    0 Like Reply
  • Aaron King

    In reply to: Guest (Anthony Sortino)

    Using 24v instead of 37v, it would take more amps to make the same power as the equivalent 37v system. Using 70amps (max) and 24volts, your motor would achieve 1680 watts. To achieve the rated power output of the motor (2700 watts) with 24v, you would need to push 112 amps through the motor which exceeds it's amp load rating and would likely fry the motor. If you really need more power then use a higher voltage system - or you can use a motor with a lower kv value (more torque but lower max speed).

    Also keep in mind that the battery voltage is always listed as nominal voltage and the actual battery voltage will be higher by a few volts.

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  • Guest (Anthony Sortino)

    So, in essence, an ESC with a max amp rating that is 10 - 20% higher than the max amp rating of the motor would only ever allow the motor to draw what it needs without burning it up.

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  • Aaron King

    In reply to: Guest (Anthony Sortino)

    Yes that should be fine. The system is only as strong as the weakest link so always add a little extra capacity as a buffer. I ride with my Mamba Monster ESC turned down to 25% torque so these boards aren't really pushing the limits of what the components can handle. If you are going for high performance or for use on steep hills, you may want to buy components with higher ratings than what I recommend in these articles. When in doubt, get a $25 in-line amp meter to measure your actual peak amp draw.

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  • Guest (Anthony Sortino)

    I entered the specs into an electrical calculator and, just like you said, 24V pushing 70 Watts gives you a 1680 Watt motor. The Ohm value was 0.342857143 (see pic). What is the usefulness of this number in choosing a motor? Thanks for responding to all of this so quickly.

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  • Aaron King

    In reply to: Guest (Anthony Sortino)

    I'm not quite sure. from what I found on this forum, "The lower the resistance (a.o.), the higher motor efficiency, the more power the motor can handle."

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