Category Archives: hub motor

26 inch 36V 250W rear hub motor electric bike kit

Posted by on February 22, 2025 No comments

Q:Does Item Number:LBCK263250R hub motor kit have throttle only option? Also does it have motor cutoff brake sensors?

A:This Item hub motor kit works with throttle or pedal assist or both of them.
Come with brake lever with cut off function. But not come with cut off brake sensors.
We have brake sensors on our site.
https://www.leafbike.com/products/electric-bike-parts/hydraulic-mechanical-brake-cut-off-sensor-switch-cable-1213.html

Q:What’s the difference with brake levers with cut off function verse brake cut off sensor?

A:The same.
If you don’t use our brake lever, prefer yourself brake lever, can install this cut off sensor.
If use our brake lever, don’t use this cut off sensor.

Q:Okay.I understood thank you
I’m thinking about the rear 250w hub motor or the rear 350w hub motor.
I like the smaller display that the 250 has. If I get the 350 watt bike motor kit can I ask for the smaller display that comes with the 250?
Also I have a 7 speed cassette will both these motors work?

A:Yes. We have smaller LCD that can work this 250w or 350w controller.For example: LCD-07U, LCD-005 or LCD-004
Can make cassette version motor. But, should tell us after paid. (Default: fit for 7 speed freewheel sprocket)

Q:Can you help me further?
I have a Electra townie bike.
The tires are 26 inch with cruiser size tires(not fat tire) but they are the 2.125 size. My bike also has linear pull brakes, not disc brakes.
The 350 and 250 watt hub motors all sit tires sizes too small and I don’t see any that accept rim brakes
I want to add a 250 or 350 watt rear hub motor to this bike.

A:When you order, leave message: 26 x 2.125 tire.
Then we use the other 26 inch rim
https://www.leafbike.com/products/electric-bike-parts/26-inch-e-bike-rim-1094.html
All of our rims can accept rim brakes.

Q:What I am clear on is that you have bike motor kits for rim brakes. You have kits for my tire size. Thank you for answering those. I do have free wheel and its shifted with a 7 speed cassette

My remaining questions are:
1. I need a freewheel with a seven speed or a freewheel that can accept my cogs.from my existing wheel. Do I just state this in the comments?
2. I am trying to decide between the 350w and 250w rear bike motor kit. LBCK2636350RG and LBCK2636250R.
3. Does the 250w hub motor kit also have pedal assist?
4. Does the 250w hub motor kit also have the cruise control feature?
5. Do they use the same controller?
6. I like the display on the 250w bike motor kit. If I get that with the 350w bike motor kit will i lose any features?
7. Can i have a thumb throttle instead of the twist throttle?

A:1. This hub motor kit can work with standard size 7 speed freewheel or 1 speed cog.
3. both have pedal assist function
4. both have cruise control
5. Different controller
6. 350w also have that display. (Just tell us what kind of LCD)
7. Yes, can use thumb throttle. We can ship thumb throttle.

The hub motor works very well but with E7

Posted by on September 19, 2024 Comments Off on The hub motor works very well but with E7

Q: I connected hub motor to the controller and everything up correctly and the display powers on perfectly well but when I turn the throttle on nothing happens with bike motor. Is there a necessary configuration?

A: First connect hub motor.Controller will check Hall sensor.Display E7. If connect wires well. E7 will be off. If always display E7. Bike motor works in no Hall status. Just check White big plug with red,black,green,blue,yellow..(Hub MOTOR SENSOR PLUG)If one wire is not connected well.Always display E7. Check if pin inside white big plug was bent?

Q: I checked the pins in that sensor plug, they all seem to be perfectly fine. The hub motor has not worked since I got it even if the hall plug is unplugged. Is there a change in settings for sensor less?

A: There are two brown wires from controller. Remove black tape on two brown wires. Don’t turn throttle. Plug these connectors together. Controller can look for correct working way. .Plug them.If bike motor Not work，Disconnect them.Then re-plug until work correctly.Then disconnect them.Turn throttle

Q: Cool I will try, should I turn the bike off before I connect the wires or should I do this while it is on? Will connecting those wires spin the motor?

A: If plug these two connectors,also can’t solve it. Controller always remembers this E7 is correct working way. Do it as below: 1.Disconnect/remove your battery power plug 2.controller’ red and black wires touch together for 1 second.Let controller to be default Then re-connect your battery to controller.(If wires are connected well).Must solve it.

Q: When I connected the pedal assist it works perfectly, so it must be the throttle, could you verify for me that this is the correct wire orientation?

BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Posted by on September 6, 2024 Comments Off on BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Q: Please send me a quote for this 20 inch 48V 52V 1500 Watt rear hub motor laced to a 20 inch double wall rim with 1.75 inch tyre.
few questions:
-what is the overall diameter ( mm ) of the 20 inch rim with 1.75 inch tyre ?
-what is the dropout distance of the axle ( mm ) ?
-please send me a schematic wiring diagram of the cable wires.
-estimated delivery by standard sea freight to Sydney, Australia.
-estimated delivery time ( weeks ).

A: This 20 inch BMX rear bike motor is fit for about 110mm rear dropout. (The dia. of shaft is 14mm, 14mm screw nuts, flat is 10mm that fit for 10mm)
Please click below site.
https://www.leafbike.com/products/e-bike-hub-motor/bmx-20-inch-48v-52v-1500w-rear-hub-motor-electric-bike-wheel-1264.html
If your tire is 20 x 1.75. When you order, tire size,choose: 20 x 1.5″ / 1.75″ / 1.95″
Total size of 20 inch rim is 420mm (about 16.5″)
There is one cable from motor with 3 heavy green,blue,yellow wires and 5 thin red,black,green,blue,yellow wires.
It takes about 10 days to deliver in Sydney, Australia.

Q: yes I think the Power Circle 20 inch rim with 1.75 inch tyre will suit my e-scooter rear frame.
My rear frame dropout is 135 mm, can you replace the 110 mm axle dropout with a 135 mm axle dropout.

The hub motor looks like it has a lot of torque (N. m), do you have torque arms that can fit on each side of the axle flats.
This will allow me to fix the torque arms to my rear frame to stop the axle spinning backwards under hard acceleration.

Do you have a wiring schematic for all the wires coming out of the hub motor so I can check which wires needs to connect to my Controller.
Is there a wire for the thermistor for the hub motor temperature sensor.

A: please click below site.This motor is 135mm dropout.
https://www.leafbike.com/products/e-bike-hub-motor/20-inch-48v-52v-1500w-rear-bike-motor-wheel-1016.html
We don’t have torque arm now.
We have NTC-10K and KTY84-130 two kinds of temp.Can choose one of them install into motor.Will come out a white wire.

Q: What is the temperature of the two types of wire… Which one is suitable for the hub motor?

A: Maybe your display can choose set and choose any one of them. Default: KTY84-130 (Most customers use this temp)
But, also other customers asked us to install NTC-10K inside motor.

bike hub motor speed

Posted by on January 29, 2024 Comments Off on bike hub motor speed

Q:Just a quick question. What is the tooth count on the freewheel sprocket?
A:16T or 18T
Q:Do you know which one? I may want to change it to a different tooth count.
A:Please click below site. This kind of single cog. (If you told us before shipment. We can put this one in parcel for free.
Q:I still wasn’t sure what front chain wheel to rear cog combination would work best with this motor. I can get the cogs here easily.The hub motor arrives today. Well done as always! Hey, I need the Kv for the motor in RPM/V and the number of pole pairs for my controller.
A:about 19 rpm/ V, 46 pcs magnets (23 pair)
Q: I am finally setting up the new bike motor. I assume the 750w is a 48v based version so the rpm if we use the provided figure kV figure of 19 rpm/V is around 912 rpm. Am I correct?And what is the max phase current on the motor?
A:We didn’t test this hub motor on machine. We worry load it that will break this bike motor.
So don’t know max current.
max phase current is about = 1/3 of max current.
Q:Thank you for explaining max phase current but can you approximate what your other similar hub motors had for a max current and then I can approximate from there. I need it to complete setting up the controller.
For example, what is the 4T 750w 48v max current or what is the 1000w 48v 4T max current, etc. From there we can get pretty close to what it is.
I am doing lots of diagnostics and see that my bike motor is maxing out at around 731 rpm. Why am I not getting 912 rpm?I am getting a max rpm of 763. I am using a 52v battery.
A:For example: 1500w 4T no load speed is about 610rpm @48v works with square controller
1000w 4T no load speed is about 720rpm @48v works with square controller
I think your 4T hub motor max about 830rpm no load speed works with square controller
If works with sine wave controller, 10% slower than square controller, about 747rpm no load speed.

BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Posted by on January 28, 2024 Comments Off on BMX 20 inch 48V 52V 1500W rear hub motor electric bike wheel

Q:Please send me a quote for this 20 inch 48 V 52V 1500 Watt rear hub motor laced to a 20 inch double wall rim with 1.75 inch tyre.
few questions:
-what is the overall diamater ( mm ) of the 20 inch rim with 1.75 inch tyre ?
-what is the dropout distance of the axle ( mm ) ?
-please send me a schematic wiring diagram of the cable wires.
-estimated delivery by standard sea freight to Sydney, Australia.
-estimated delivery time ( weeks ).

A:This 20 inch BMX rear bike motor is fit for about 110mm rear dropout. (The dia. of shaft is 14mm, 14mm screw nuts, flat is 10mm that fit for 10mm)
Please click below site.
https://www.leafbike.com/products/e-bike-hub-motor/bmx-20-inch-48v-52v-1500w-rear-hub-motor-electric-bike-wheel-1264.html
If your tire is 20 x 1.75. When you order, tire size,choose: 20 x 1.5″ / 1.75″ / 1.95″
Total size of 20 inch rim is 420mm (about 16.5″)
There is one cable from bike motor with 3 heavy green,blue,yellow wires and 5 thin red,black,green,blue,yellow wires.
It takes about 10 days to deliver in Sydney, Australia.

Q:yes I think the Power Circle 20 inch rim with 1.75 inch tyre will suit my escooter rear frame.
My rear frame dropout is 135 mm, can you replace the 110 mm axle dropout with a 135 mm axle dropout.

The hub motor looks like it has a lot of torque (N. m), do you have torque arms that can fit on each side of the axle flats.
This will allow me to fix the torque arms to my rear frame to stop the axle spinning backwards under hard acceleration.

Do you have a wiring schematic for all the wires coming out of the hub motor so I can check which wires needs to connect to my Crystalyte Controller.
Is there a wire for the hub motor temperature sensor.

thanks for assisting with my inquiry.

A:Please click below site.This bike motor is 135mm dropout.
https://www.leafbike.com/products/e-bike-hub-motor/20-inch-48v-52v-1500w-rear-bike-motor-wheel-1016.html
We don’t have torque arm now.
We have NTC-10K and KTY84-130 two kinds of temp.Can choose one of them install into motor.Will come out a white wire.

Q:What is the temperature of the two types of wire… Which one is suitable for the hub motor?

A:Both of them are suitable for the hub motor.
That depends on your controller & LCD reads which temp, NTC-10K or KTY84-130

Q:I have a Crystalyte 48V Controller from China and my display is a Cycle Analyst V3 from Grin Technologies in Canada.

which temperature sensor and wire should be selected.
what is the maximum temperature degree Celsius the hub motor can operate to without damage or burn out.
Our weather is very hot in Summer season and a lot of my customers have burned out their hub motors because of high temperature when riding up hills.

My new hub motor kit is all hooked up

Posted by on January 27, 2024 Comments Off on My new hub motor kit is all hooked up

Q:My new hub motor kit is all hooked up as directed an error 7 keeps popping up. I checked the wires all tight an right and still error 7.
A:Don’t care error 07.After work for 2 seconds.It will be off.
Q:Does not go off
A:If always error 7.Please check white plug’s red,black,green,blue,yellow wires.
Q:Have checked all wires an are tight and correct still error 7. So has to be bad bike motor.So what happens now refund or send me a hub motor that works.
A:Impossible to have issue for hub motor.
Q:I will try what you say with white wire an yes possible motor not work because this one doesn’t work I will get back to you on this if works fine if not we have a refund coming to me for bike motor at least.
A:Disconnect this big white plug. Motor still can work, but with error 07.
So should check this white plug ‘s each wire, each pin.
After each pin is good, each wire is good. Plug this big white connector to controller, then error 07 will off.
Q:Got error 7 off an right direction in pas 2 but switch to pas 3 an now don’t work at all no error 7 or anything just don’t throttle in any pas.
A:It doesn’t matter with PAS.
Could you take a video for this issue? Thanks.
Q:Hub motor made a electric sound but didn’t move an I’m not a video tech.
Disc is on left it’s not installed an bike is upside down an motor run right direction then wired all back an tried throttle a motor worked shut off an turned back on no errors on screen but now no throttle.
A:P09 must be “0” (Be 0, motor stops, turn throttle, motor works)
If be 1, throttle not work. Must push wheel, after wheel turn, turn throttle, motor works.
P10 must be 2. （If be 0, throttle Not work.)
Press “up” and “down” togehter. Then set P 01 , P 02…
Please check P09, P10
P 09 = 0
P 10 = 2
Q:Thank you the 0 on p9 worked all is working now wow thanks a lot.

set bike motor controller

Posted by on September 3, 2023 Comments Off on set bike motor controller

Q: When I have put on the washers and Shimano cassette lock ring the dropout spacing goes from 135mm to 140mm. Is this normal? It is a tight fit in an aluminium mountain bike frame and I have to press a bit with my thumbs but it does go in ok and then the wheel spins fine. Does this sound ok?

A: This cassette version hub motor should reach about 137~140mm.
It’s normal.

Q: Many thanks for a great bike motor and fast reply to emails. Just posted a rave review. Only issue is many ebikes could do with more info. regarding programming for hub motor controllers and displays.
I’m trying to program for a KT-LCD3 display so can you tell me the
P2 Wheel Speed Pulse Signal Setting (pulses per revolution)
C2 Motor Phase Classification Coding Mode (I’m using a KT sine wave controller)

I’ve already got this manual and it does NOT tell me the specific answers to my 2 questions. Please pass my questions on to one of the electrical engineers at Leafbike.

A:
P manual comes with LCD.
Set P as below:
P1= 46
P2= 0
P3= 1
P4= 0
P5= 15
Don’t set C.

Q: Thanks and will try out the settings.

Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit

Posted by on September 2, 2023 Comments Off on Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit

Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit
Q: I need to order this item Item ID #LBCK20482000FS 20 inch 48V 2000W front fat hub motor electric bike conversion kit and all have to do is install it and it should be ready to go using my 60V 20A lithium battery ? Is it very difficult set up? Will there be instructions on how to set up the LB08HU? Is there an app to connect to the LCD display? Approx time if I order to get it shipped?

Will this this kind of hub motor melt if a heavy biker rides it on a 20% grade steep hills and electric hub motors are a challenge and require a properly sized and adjusted system to avoid overheating. The torque a hub motor can make is related to the physical magnet strength, width, air gap and diameter. The winding arrangement determines the voltage and current to make this torque. I also would like to add a part for better cooling.

Did you get my update info,Please advise if the one you recommend will meet these requirements.

A: This 20 inch 48V 2000W front fat hub motor electric bike conversion kit can work with 60V 20Ah lithium battery.
Very easy to install.
But because this hub motor is stronger and heavy,it’s fit for front snow bike ‘s  135mm dropout

08HU manual enclosed. 
Where to install each part and how to connect each wires as below wire diagram
https://www.leafbike.com/u_file/2302/04/photo/20-inch-front-fat-bike-conversion-kit-wire-diagram_3994ff0c09.jpg 

After place an order, wait for about 2 ~ 3 days can ship. 

Q: This is what’s on the trike, your hub suggestion shows 135mm will it work?
Technical details
Hub Motor type Brushless direct drive Output range 250 – 6000 Watt Voltage range 48 – 96 Volt Maximal Amp 90 Amp RPM / V 10 Torque 115 – 150 Nm Efficiency 88% Weight 9 kg Drop out 140 mm Disc brake mounting Yes Sprocket gear Freewheel mounting Front or rear wheel Rear wheel Controller type Sensorless & sensor controllers
Magnet width 40 mm Poles 46 pair Hall sensors 3 x Honeywell Bearings NSK industrial Sealings Yes Motor phase plug 3 x XT150 Hall sensor plug Mini XLR 5 pin Temperature sensor Yes
Spokes SAPIM 12G INOX (size = 2,6 mm) Rim EXAL EX25 20/26”  extra wide rim Rim sizes 20” & 26”

A: 135mm works.  (add 1 washer both side, reach 140mm)
Below is 48V 2000w motor drawing. (46 pcs 42mm width magnet, 3 pcs hall sensor, 12G spokes, 5mm or 6mm phase wire)
https://www.leafbike.com/u_file/2301/07/photo/2000w-front-beach-snow-fat-bike-motor-drawing_bbdbc1e4ce.jpg 

Below is 60V 2000w motor drawing (46 pcs 35mm width magnet, 3 pcs hall with 1 temp, 12G spokes, 3mm phase wire)
https://www.leafbike.com/u_file/2301/07/photo/1500w-front-beach-snow-fat-bike-motor-drawing_890f09dd23.jpg 

20 inch 60V 2000W front hub motor Beach Snow Fat Tire bike conversion kit

Posted by on August 31, 2023 Comments Off on 20 inch 60V 2000W front hub motor Beach Snow Fat Tire bike conversion kit

Q: Can this be purchased for the 20 inch 60V 2000W front wheel? I Have a 60V 20A battery set up trike.
Item No.LBCK20602000RS 20 inch 60V 2000W rear hub motor – Beach Snow Fat Tire bike conversion kit

A: Yes, we have.
Please click below link. Thanks.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-60v-2000w-front-hub-motor-beach-snow-fat-tire-bike-conversion-kit-1329.html

Q: I don’t see a way to put my disk brake rotor on the front hub motor. Is it possible to do this?

A:There are six screws on hub motor cover for disc.

Q: Thanks for your help but my e-trike disc hub is on the left side or the opposite of your picture. Do I have to install on my right side to work.

A: This hub motor default: disc on the left side.   (Disc cover on the left side of frame)
If you need to install disc on the right side. We also can make this motor ‘s cover on the right side of frame.

Q: Can you build something like this? I need it to be able to handle more torque than speed. I am about 340 lbs .

60V 20AH Lithium Battery Pack
 QK TC65 Motor 
Motor type Brushless direct drive Output range 250 – 6000 Watt Voltage range 48 – 96 Volt Maximal Amp 90 Amp RPM / V 10 Torque 115 – 150 Nm Efficiency 88% Weight 9 kg Drop out 140 mm Disc brake mounting Yes Sprocket gear Freewheel mounting Front or rear wheel Rear wheel Controller type Sensor lesscontrollers. Magnet width 40 mm Poles 46 pair Hall sensors 3 x Honeywell Bearings NSK industrial Yes Motor phase plug 3 x XT150 Hall sensor plug Mini XLR 5 pin Temperature sensor Yes
18 FET Controller or better
 20” x 4” Knobby Front Tire 

A: We can make disc on the right side.  (But there is a issue. Your 140mm disc ‘s 6 pcs screws are easy to loose.
Our 60v 18 -mosfet controller, max about 45amp. Motor phase wire is 3mm. (weight is less than 9kg)
If need to stronger motor, please click below site. Below motor phase wire is 5mm or 6mm (weight is over than 9kg)
This motor can work with 60v,72v controller. 
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-48v-52v-2000w-front-hub-motor-beach-snow-fat-tire-bike-conversion-kit-1169.html

Order inquiry for bike motor and spokes

Posted by on August 30, 2023 Comments Off on Order inquiry for bike motor and spokes

Q: I am looking for a rear hub motor, however I can not find in your website. I need a rear bike motor installed in the rim. My rear wheel tire is 27.5” x 2.4”. I am looking for only 1000w 48v.
 If you have in stock, please send me the link so I can go forward with a purchase.

A: Please click below site.
Rim is 32mm width. Fit for 27.5 x 1.95″ ~ max 2.4″
https://www.leafbike.com/products/e-bike-hub-motor/27.5-inch-48v-52v-1000w-rear-bike-motor-wheel-1374.html

Q: Thank you for your response. I have a question for you. What is the sprocket type? I am looking for a freewheel sprocket. 

A: Default: freewheel

Q: Before I begin to purchase a new hub motor I want to mention something. 4 years ago I ordered a 48v 1000w 700c rear wheel bike motor e bike kit from leaf bike,  and I still have it till this day….I enjoy using it and I am having a lot of fun with it and I want to keep it….I recently ordered a brand new bike and I really want to exchange my original e bike kit into my new bike, however my new bike is on a different size rim (27.5” x 2.4”). 
I have begun this project of mine and I am facing a problem with my spoke install. I ordered 36 x 170mm spokes from a bike store, installed the 1st and 2nd set of spokes easily, however, to do the 3rd and 4th set is impossible as I can not reach the rim hole. I noticed on your website that size 170mm spokes are the correct size length, they are 12 gauge, I followed the exact same spoke  pattern as the 700c wheel, yet I have no success. What am I doing wrong? 

A: 700c rim is about larger than 27.5 inch
27.5 inch is a little than 26 inch