Tag Archives: electric-bike-motor

26 inch electric hub motor kit for the dropout 160mm fork

Posted by on April 5, 2025 No comments

Q: Are you able to supply a rear hub motor kit wheel (36v @ 500W – 750w) for a rear dropout of 160mm?
I have an existing e-bike that uses a 250w geared rear hub drive on a 26 x 1.95 wheel.
It has a 7 speed gear, standard 160mm disk brake and a bike mount (frame) width of 160mm.
I would be happy to go from a geared (small hub) to the larger electric bike motor kit type.
The existing bike frame is steel (not carbon or an alloy) so I may be able to ‘bend’ the rear forks… (fit).
I have included a PDF diagram (attached) to show the existing rear hub motor fitting size.

A: Yes, we have dropout of 160mm 36V 750W electric bike motor.

Q: With the new Leaf controller and LCD, I know I can limit the maximum output speed of the 750w Direct Drive hub motor to a set (safe) maximum speed for each PAS mode 1 – 5.
With our Australian laws, I want to honor speed and safety – yet have a safe speed and torque (reserved) for hills.
I respect that you have kindly supplied my order with a 320RPM hub motor ( a good choice).
My question is: “Does the max speed by set by LCD / Controller economically limit the maximum current sent to the hub motor”?
I am talking here about battery life with a low speed LCD / Controller setting ‘modulating’ the full power sent to the hub motor.
So if I program the setting to say 25Km/h, then is the torque output effected at speeds less than the given 25Km/h?

A: Yes, if you set max 25kmh by LCD, motor will work less than 25kmh.(You can set max 10kmh,11kmh,12kmh….48kmh,49kmh,50kmh)

1.Press “SW” from LCD. Turn on LCD
2.Press “up” &”down” together for more than 2 seconds in 3 seconds after LCD display – Then “72” will flash.
3.Press “down” or “up” to set any max speed. Press “SW” one time to save. Then “26” will flash. It’s tire size. Don’t set. Still press “SW” one time to save. Then “kmh / mph” will flash. Don’t set. Press “SW” one time to save.
4.At last, press “SW” more than 2 seconds, then will be back.

There is a Three button switch inside parcel.

** Black switch (be Left side / Middle – motor works forward. Be right side, motor works backward/reverse)
** Red switch (Be left side / regen off. Be right side / regen on)
** Green switch ( When motor is working, press this green switch one time. LCD is display C, motor will work as the same speed) – Re-press this green switch one time, or press brake lever, turn throttle to max, motor will stop.

measure electric bike hub motor hall sensors

Posted by on April 5, 2025 No comments

Bike motor controller is fine, they all got 4.9~5.0 from meter reading. We will open and check the hub motor after work. We are more worried about if the electric bike motor itself is damaged.

Could you get the below data:
1. Remove this white biggest plug, power on and measure volt of white biggest from brushless motor controller.
Red, Black, blue, green and yellow
1.Red and black is about 4.9V
2.Blue and black is about 4.9V
3.Green and black is about 4.9V
4.Yellow and black is about 4.9V

If you can get the data, the bldc motor controller is okay.

LCD always display “05 flashing”.
The issue comes from electric bike motor hall.(five wire: red, black, green, blue and yellow)
Could you check this five wires whether through?

This is a instruction about how to disconnect this hub motor.
It takes about 10 minutes to disconnect.

You will find a PCB around the rotor-winding. There are five wires (red, black, green, blue and yellow) are on this PCB.

I removed both panel on hub motor and did a quick test. All the thin wire looks fine. They can go through from both side. But the thick wire connect to enameled wire that I can’t test since they been wrapped up.

If Not flashing. Then it will work.
Could you get below data from electric bike motor hall sensor?

Three are three hall sensors around rotor winding.
For example:
hall 1 Green (pin 1.1 pin 1.2 pin 1.3)
hall 2 Yellow (pin 2.1 pin 2.2 pin 2.3)
hall 3 Blue (pin 3.1 pin 3.2 pin 3.3)

Pin 1.1 ,pin 2.1 and pin 3.1 are connected to the red wire together.
Pin 2.1 ,pin 2.2 and pin 2.3 are connected to the black wire together.
Pin 1.3 is green,pin 2.3 is yellow,pin 3.3 is blue.

Volt meter Red Pin to Pin x.1 black Pin to x.2 (x=1,2,3)You will get below data:
Pin 1.1 and pin 1.2 is about 1.185 (see picture 5)
Pin 2.1 and pin 2.2 is about 1.185
Pin 3.1 and pin 3.2 is about 1.185

Volt meter Red Pin to Pin x.1 black Pin to x.3 (x=1,2,3)You will get below data:
Pin 1.1 and pin 1.3 is about 1.498 (see picture 4)
Pin 2.1 and pin 2.3 is about 1.498
Pin 3.1 and pin 3.3 is about 1.498

Volt meter Red Pin to Pin x.2 black Pin to x.3 (x=1,2,3)You will get below data:
Pin 1.2 and pin 1.3 is about .633 (see picture 6)
Pin 2.2 and pin 2.3 is about .633
Pin 3.2 and pin 3.3 is about .633

Another way to test hall sensor:
Connect all wires, power on.

Measure red, black, green, blue and yellow BLDC motor hall wires
1.Red and black is about 4.9V
2.Black and yellow is about 4.9 or 0V (Please use your hand to turn hub motor, the data will change from 4.9-0V)
3.Black and blue is about 4.9 or 0V (Please use your hand to turn hub motor, the data will change from 4.9-0V)
4.Black and green is about 0V or 4.9V (Please use your hand to turn hub motor, the data will change from 0V-4.9V)

If nothing is changed, this hall was broken.
How about the other black and red wire?
Only black or red wire can’t touch well or not go through, 05 will be always flashing.

Hub motor info and prices

Posted by on April 5, 2025 No comments

Q:My name is James and a while ago I purchased a hub motor in your casted 16 inch wheel. I had problems with it due to a broken wire and we worked out a replacement for it.
Since then I have put in over 1200 miles (over 1900 kilometers) with no problems! It is a very good electric bike motor, controller and controls and I am very pleased with it.
I am putting together a product that uses the same 16 inch rear wheel and may order up to 5 units at a time.
Here are my questions:
1. Can you provide a quick disconnect from the hub motor wire to be able to change a flat easier? If so how much extra would that be? Or can you provide us with the connectors so we could do it?
2. What is the RPM difference between the 750 watt 36 volt model compared to the 1000 watt 48 volt model?
3. Is shipping cheaper if 5 motors are ordered versus 1 hub motor ordered?
Thank you very much.
I look forward to doing business with you in the future.

A: Glad to hear that.
1.Yes,we can provide a quick disconnect.
* If just make a cable with this white big male & female plugs.Don’t need extra cost.Also,we can customize cable as your order.
* If quick disconnect like as : circular male & female plugs with 8 pin.(All of motor’s 8 wires are connect to this 8 ping)
* Our 36V 750W and 48V 1000W are the same hub motor, just work at different voltage.
* Yes,if order 5 pcs,the shipping cost will cheaper.(The shipping cost also depends on the parcel’size)
For example:If order 5 sets of 16 inch,the shipping cost is cheaper than 5 sets 26 inch…

Q:On your 48 volt 12 Mosfet electric controller is there a way that I can reprogram it to change the pedal assist parameters and regen parameters?
1. I am making a product that is called the Wattwagon and find I get more control using pedal assist versus using the throttle. I mostly use PA level 2 and then 1 and 3 and occasionally 4. Pedal assist 5 for my application is too strong. I would like to have a setting in between 1 and 2 for climbing steep hills without wheel spin.
2. When I hooked up regen it was too strong and would slow me down too quickly. I would like to program for a regen that is about half that amount.
I hope to order some electric bike motors soon since I have some pending sales.

18 inch gearless brushless hub motor for electric bike

Posted by on April 2, 2025 No comments

I am interested in the 18 inch rear gearless bldc hub motor provided by leaf bike company and I had a few questions about the hub motor.

1) What is the rated torque?
2) What is the maximum torque?
3) How many poles are there in this hub motor?
4) Does it contain any brakes? If so, what type? (Disc/Drum/V-brake)
5) Does it contain hall sensors? If so, How many and what is their description?
6) Most importantly, is this motor a brushless dc motor (BLDC) or a permanent magnet synchronous motor(PMSM)? This greatly affects my choice, as both types are sometimes very close to each other, so I needed verification on what type it was.
7) Does it have a waterproof gradient?
8) Dimensions: I had an issue with the dimensions listed in the description compared to dimensions in the drawing for the motor on Leaf Motor site. I am actually looking for a motor that is around 16 inches, however, I chose the 18 inches because the image for the 18 inches shows the diameter being 372 mm which is equal to around 14.6 inches, which isn’t 16 inches but is very close. The diameter of the electric bike motor is crucial for my wheel choices and so clarifying what the actual diameter of this motor would be very helpful, I can’t risk not being sure of the dimensions as I am currently designing the vehicle and need to be very accurate, and that’s why a professional mechanic is needed specialized in this kind of vehicle, because sometimes people think a person who’s good with cars will be good at bikes too.
9)Does this motor support regenerative braking?
10) What is the back EMF of this motor?
Finally, I would like to apologize if these are too many questions but I am in need of the maximum clarifications I can get to be as precise, so any information you can provide will help me on my quest to find the best. I will be forever grateful for your help.

A:
Please click our new site.
https://www.leafbike.com/products/e-scooter-hub-motor/18-inch-electric-motor/
There is more drawing & performance.

* This 18 inch is fit for 18 * 2.125 or 2.5 tire.
The dia. of this 18 inch is 372mm, it’s fit for 18 inch bike tire.

* 46 pcs magnet, with 3 pcs hall sensor… It’s brushless motor.

48V 1000W 1500W rear hub motor for 20 inch or 24 26 27.5 700c 28 29 inch

Posted by on April 2, 2025 No comments

Do you have a more detailed drawing for dimensions of the 48V 1000W,1500W rear hub motor? I am particularly interested in the dimension I marked “A” so I can be sure the brake rotor disc will fit correctly.

The drawing from your web site shows the left side of the hub motor on the right side of the drawing. Also, in the video the hub motor is installed backwards and the rear derailleur is just hanging off the bike on the cable. Very confusing, but eventually I understood that the person who installed your hub motor on the bike put the motor in backwards, with the wire coming out the right side even though your specifications say the wire comes out the left side.

I suggest that you make all of your drawings, pictures, and video consistent left to right, because they are presently mixed up.

Here is an example of a drawing that is correct left versus right and has all the dimensions a bicycle builder needs to be confident the motor will fit the bicycle.

If I order with a free hub to use a cassette is the free hub body replaceable?

Does it look something like this?

Do you have a part number or a link for the replacement free hub and cassette for that motor?

Thank you very much for all the information, I really like this hub motor but I need to make sure it will fit and work well for my bike.

Motor controller with LCD-003 from Leaf Bike

Posted by on April 2, 2025 No comments

48V 1000W-1500W-2000W, 36V 250W-500W-750W, 24V 250W Motor controllers with LCD-003 from Leaf Bike are used to drive 8-9-10-12-13-14-16-17-18-20-22-24-26-27.5-700C-28-29er inch hub motor bike wheels.

How to set max speed?
If you feel 20 inch or 24 inch,26 inch, 700c, 28 inch, 29 inch hub motor kit is too fast,please set it to be low speed.
* Press “sw/middle button” from LCD more than 2 seconds,then LCD will display.
* Press “up & down button” together more than 2 sconds until 72 is flashing ( 72 is kmh, if you hope works 20mph / 32kmh, press “down” to be 32)
* Press “sw/middle” button one time to save,then 24 is flashing.. (24 is hub motor wheel size. Don’t set)
* Press “sw/middle” button one time to save,then kmh or mph is flashing..
* Press “sw/middle” button one time to save,then press “sw/middle” button more than 2 seconds until be back.

Turn throttle,motor will work max speed as your setting.

—————
There is a “ 5 or 4 or 3 or 2 or 1 or 0” on the Left side of LCD.
* Be “0” – throttle & pedal assist NOT work.
* Be “1” – throttle works (If install pedal assist, pedal about 3 circels,then can drive motor to work)
* Be “2” – throttle works (If install pedal assist, pedal about 2.5 circels,then can drive motor to work)
* Be “3” – throttle works (If install pedal assist, pedal about 2 circels,then can drive motor to work)
* Be “4” – throttle works (If install pedal assist, pedal about 1.5 circels,then can drive motor to work)
* Be “5” – throttle works (If install pedal assist, pedal about 1 circels,then can drive motor to work)

If NOT install that pedal assist,ONLY use throttle to drive motor. But Should be 1 or 2 or 3 or 4 or 5.(Be 0,turn off throttle)

——————————–
How to use three button switch?
1.We cut off that blue wire.It’s for reverse. If reconnect this blue wire.
This yellow button be left / middle,29 inch bike motor kit works forward. Be right side,hub motor works bacwkard / reverse…

2.Green button is used to control cruise, while electric bike motor is running,also over some speed,example: over 1/3 max speed,at this time,press green button one time,then loose throttle,LCD display “C”,motor will works the same speed. Re-press this green button one time or press brake lever or turn throttle to max, electric bike motor will stop.

3.Red button be up,regen on. Be down,regen off. This regen is not strong.Only while braking with a little regen.

Questions regarding your DIY conversion kits

Posted by on April 2, 2025 No comments

Q:I assume your electric hub motor bike conversion kits are speed limited, consider for example your 250W 36V hub motor bike conversion kits. Usually it seems the speed limit it set to something like 25 kmph, or so.

I building a custom bicycle and I am interested in knowing if this speed limit can be configured to be higher. I guess I am thinking this possibly is the case if one can simply enter a lower wheel size when configuring the controller. Could this be there case, or is there may be some other way to do this using your kit?

Also, are you by any chance the same company as leaf bike? And if so, does this answer also apply to the e-bike conversion kits sold under that name, e.g. their 250 W 24 V conversion kits?

A: Yes, our controller has speed limit.
There is max speed display on our leafbike.com site.
We set LCD as wheel size.For 12inch,14inch,16inch,18inch,20inch,24inch,26inch,27inch,27.5inch,700c,28inch and 29 inch..
For example: our site write: max 70kmh ( You can limit max speed under 70kmh,from min 6kmh to max 70kmh)
our site write: max 24kmh ( You can limit max speed under 24kmh,from min 6kmh to max 24kmh)

Q: Thanks for the info. Just so that I understand correctly, let me ask these questions:

For example, considering your DIY e-bike kit 700c hub motor kit front wheel, Item ID #LBCK700C24250FM”. Our your web-site, says that it is speed limited to 36.1 kmh (actually used to say something like 25 kmh, you increased it?). Though this speed seems sufficient (now) I still wonder if I can modify this speed limit in some way. Say, if I configure the controller to a wheel size smaller than 700c. If that it possible I am thinking the max speed would be increased. Is that something that is user configurable, or it is hard coded into the controller that it is for a 700c wheel?

Is it also maybe the case that the controller that one get if one buys, say , this kit also works with some more powerful motors? But maybe it is limited to the operating voltage of 24 V?

Do you have recommendations as to if one should go with, say, a 24V or a 36V system?

Finally, I note on the web-site I list above, seems that you are showing the motor performance table for a 36V motor. Could it be that it should show the performance of the attached motor data for a 24V motor?

Just another question here.

For your 36V 250W front wheel DIY kit, the max speed is listed as 26.3 kmh or 16.4 mph. This seems that it can be a bit limiting for some jurisdictions. Is it maybe the case that you have increased this max speed also to 36.1 kmh as listed for the 24V version? And, also, here, can I configure it for a lower bike speed to make it go faster or is there some other way to increase this speed limit?

By the way, I see the advantage with the 36 V systems. You get more watt-hours in your battery. Seems like better choice for my use case.

electric bike motor 48v 1000w leaf

Posted by on April 1, 2025 No comments

Only the electric bike motor. I will not use tire. I will not use rim. I only use 48v 1000w motor.If it works for me I will purchase many of them. (But, yes, I also need the electric motor controller)

Small size is not the only criteria.I seek powerful motor.But the hub motor alone needs to fit in 152mm diameter tube. (no rim needed. It wastes space.)

I have many questions.

I am serious buyer. I don’t make bikes or scooters. I seek your hub motors for use in my equipment, and will buy many of them when I find what works for me.

I realize you don’t have all the information easily available now. But please invest more time in answering my questions more completely:

1. Dimensions of 1000w hub motor alone. (48v-1000watt electric motorcycle motor) Weight of hub motor alone.

2. Data showing torque, energy use, and efficiency of that motor when at 120 to 140 rpm. (projected, if need be)

3. Which electronic controller would be the best, and what is its cost. I can use any voltage. I use grid power, and not use electric bike batteries.

4. Please give me a cost when ordering in quantities of 5, 10, 50, 100, and 200. Also including the cost of controllers as an option would be helpful to me.

I assume they’d be boxed in groups of 5 or more, so please determine what shipping. It would be very good.

If this information is not available through you, please send me the contact information I would be able to use myself, and I will find someone here to translate language so it is easier to communicate. I think you have the hub motors I need, but I need to verify it will work for me.

electric hub motor power cut out and nothing powers up

Posted by on March 31, 2025 No comments

Did you ride it or never ride your electric bike?
1. If never ride,please check if has “-O-“ on the top/middle of LCD screen.. if have, just make brake levers be back or disconnect brake lever’s plug.. then “-O-“ will off, throttle will work.
2. If have ridden 1-2 times,suddenly hub motor Not work.. please smell electric bike motor controller,if has smell from electric bike motor controller.

3. Also, disconnect throttle,brake lever’s plugs from electric motor controller, always press “down” button from LCD, if LCD screen display a “walk person”, aslo hub motor works as walk speed.

This may have helped a little since the hub motor wheel is spinning smooth again, but the unit will still not turn on. Twisting the throttle still does not spin the wheel and the LCD screen still does not power on.

I saw that you left a post on your website about using a volt meter to test the electric bike battery, hub motor, and bike motor controller. I can use mine to test these to help see where the issue might be.

I have not rode it, but the LCD and hub motor only ever turned on once. As soon as I spun the throttle, everything shut off. The LCD does not turn on at all.

I think I sent this video before which shows the wheel slightly spinning, then it just stops. It has not turned.

But right before I did this, the hub motor wheel did spin for a longer time, but the bike motor wheel did not spin smoothly. Then when I tried to show you what was happening in the video, all of the power cut out and nothing powers up.

I used the voltmeter and connected it to the black and red wire from the battery, it says 53V as expected.

Question about 26 inch 36v 750w rear hub motor – bike conversion kit

Posted by on March 31, 2025 No comments

Question about 26 inch 36v 750w rear hub motor bike conversion kit
1. Is the 750 watt hub motor good bike conversion kit for hill climbing? If not what would you recommend?
2. Is the electric bike motor controller current limit set to keep from burning out the hub motor when loaded?
3. I see the hub motor spec sheet is quite old 2013. Is there an up to date one?
4. What is the full old current of the motor at rated N-M load or torque?
5. Any service places for your parts in the US?
6. What size electric bike battery is recommended for your motor and controller? 36v 15ah?

1.We can make hub motor with low speed,will good for hill up.
2.Hub motor controller max 26A,so that electric bike motor max 26A
3,4.Only tell us max speed,we can customize motor…lower speed,stronger torque
5.no service place now
6.recommend 36v 15ah or more ah

Yes, I would like a lower rpm hub motor for hill up if the cost of the bike conversion kit does not change. Maybe 25 mile hour max speed flat ground or about 311 RPM. What would you recommend? What do you have that is close to that?
I need to order shortly to not miss the special on shipping that is coming to an end on Dec 28th.

Yes.We have.
When you order,only leave message: 25mph or about 311 RPM.
Then we can make this hub motor as your message.

Would it be possible to get the hub motor data for this different motor like you have on your other motors? I really like that data as I can see what the electric bike motor is capable of.

I don’t understand this phrase “Mechanical brake: Default Disk or V (If need to install drum brake,please tell us in advance)

I have not heard of drum brakes on a bicycle. I don’t have disk brakes right now but would prefer the motor be capable of adding that even though I have V brakes on the bike right now. So what should I ask for?

I forgot to add that I don’t want a geared 26 inch electric bike motor wheel. the gears are plastic and won’t last long on the hills. I hope that does not cause a problem.