Monthly Archives: April 2025 - Page 2

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.

48V 500W dual drive hub motor controller

Posted by on April 1, 2025 No comments

48V 500W dual drive bike motor controller

More info about this hub motor controller

Features:
Suitable for Electric for electric bike & scooter
>>. MOSFET: 6 PCS + 6 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Power: 500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 15 A + 15 Amps
>>. Thermal: aluminum shell and the substrate – Black color
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 164 mm L × 53 mm W × 33 mm H
>>. Weight: 0.65 kg

With LCD
Display: speed, mileage, battery gauge…

Functions:
. Mute when start
. Speed limit
. Power cut brake
. Blockage protection
. Current limit protection
. E-ABS brake
. Short circuit protection
. Avoid out of control
. 1:1 pedal assist function
. Undervoltage protection

Additional features:
* Cruise
* Reverse
* Pedal assist ( 1 – 5 )
* Mph / kmh
* ….

24 inch 36V 750W rear hub motor kit

Posted by on April 1, 2025 No comments

24 inch 36V 750W rear hub motor kit

More info about this 24 inch hub motor kit

Main Features:
>. Rim A: 24 inch double wall Alloy (Rim Fit For: 24 × 1.5″ / 1.75″ tire)
>. Spoke: Black 12 gauge / 130mm Length × 36 pcs

>. Rim B: 24 inch double wall Alloy (Rim Fit For: 24 × 1.95″ / 2.0″ ~ 2.5″ tire)
>. Spoke: Black 12 gauge / 135mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 36V
>>. Power: 750W
>>. Efficiency: 87.5%
>>. Max speed: 61.3 kmh – 38 mph
>>. Mechanical brake: Disk or V
>>. Freewheel / Cassette: space for 6 or 7 gears
>>. Cable location: shaft end , LEFT
>>. Cable length:100cm / 40″
>>. Install: spacing of 135mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 12 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 36 Volts
>>. Min. Voltage: DC 30 ± 0.5 V
>>. Rated power: 750 Watts
>>. Casing material: aluminium
>>. Maximum Current: 26 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 171 mm L × 82 mm W × 42 mm H

With LCD, More Function:
* Cruise
* Forward & Backward (Optional)
* Kmh & mph (Optional)
* Set Max speed ( 0 ~ 72 kmh / 45 mph )
* Pedal assist ( 1 – 5 )
* …

This 24 inch bike motor kit can work with a 36V battery.

24 inch 48V 1000W rear hub motor kit

Posted by on April 1, 2025 No comments

24 inch 48V 1000W rear hub motor kit

More info about this 24 inch hub motor kit

Main Features:
>. Rim A: 24 inch double wall Alloy (Rim Fit For: 24 × 1.5″ / 1.75″ tire)
>. Spoke: Black 12 gauge / 130mm Length × 36 pcs

>. Rim B: 24 inch double wall Alloy (Rim Fit For: 24 × 1.95″ / 2.0″ ~ 2.5″ tire)
>. Spoke: Black 12 gauge / 135mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 48V
>>. Power: 1000W
>>. Efficiency: 90.5%
>>. Max speed: 73.2 kmh — 45.4 mph Default (Optional other speed: 35mph or 25mph,15mph…please leave message)
>>. Mechanical brake: Disk or V
>>. Freewheel / Cassette: space for single speed… 6 speed or max 7 speed Default: Fit for Screw on Sprocket (If install Cassette Sprocket,please leave message)
>>. Cable location: shaft end, LEFT
>>. Cable length:100cm / 40″
>>. Install: spacing of 135mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 12 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1000 Watts
>>. Casing material: aluminium
>>. Maximum Current: 26 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 171 mm L × 82 mm W × 42 mm H

With LCD, More Function:
* Cruise
* Forward & Backward (Optional)
* Kmh & mph (Optional)
* Pedal assist ( 0 – 5 )
* Battery gauge
* …

This 24 inch bike motor kit can work with a 48V battery.

How to replace winding rotor of hub motor ?

Posted by on April 1, 2025 No comments

If your hub motor has issue..How to replace winding rotor?
It takes about 10 minutes to replace. Very easy.
Tool: ONLY ONE M4 Inner hexagon spanner
Do it as below / uninstall Disconnect:
1. Disconnect 16 pcs of screw nut from your hub motor (two side) – It takes about 3 minutes to do it.
2. Knock the shaft end (NO cable side) on the ground,then the cover will off from hub – It takes 2 seconds to do it.
3. Two hands hold on hub(Not rim), still knock the shaft end (No cable side) on the ground,then the whole of winding rotor will out of hub.. – It takes 2 seconds to to it.

Do it as below / Install:
1. Put the cover on the hub and put 8 pcs of screw nut on..tight them. – It takes about 2 minutes to do it.
2. Check and make sure no other thing around magnet – It takes 10 seconds to check it.
3. Put the whole of winding rotor into hub – It takes 2 seconds to do it.
4. Put the other 8 pcs of screw nut on – It takes about 2 minutes to do it.

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.

hub motor selection and rim width.

Posted by on April 1, 2025 No comments

I am looking to build an e-bike, starting with the Mongoose Dolomite. 5000W is probably too much, I see you offer 1500W hub motor kits, but I did not see any information about 4inch wheels for the fat tire bikes.
Do you have a 26 inch bike motor kit for the 26 inch fat tire bikes, rear drive, 1500W or more?
With a 9 speed cassette is there enough room for the hub motor in a 135mm drop out ?
I see now that my Shimano 9 speed rear cassette should be the same width as a Shimano 7 speed. It is the spacing of each gear that is different. However, if I am to purchase your kit, I would need you to supply the 9 speed freewheel because I assume your hub motors use freewheels and not cassettes. Right now my bike is a cassette.

Unless it is possible to supply this bike motor in the kit instead:

I should be able to mount my cassette to this motor. Can we do that instead?

This is no longer for fat tire bike so please ignore the first email about the fat tire kit.

It is for a regular mountain bike so no need to worry about 3 or 4″ tires. I have regular mountain bike tires, 26 x 2″ right now. Once I do the electric bike conversion kit, I may switch to more narrow road tires like 1.5″ or 1.75″ so the regular double wall mountain bike rim is fine.

So I made a new order with the individual parts and I excluded the brakes because I do not need them. However, it came out to be a little more expensive than selecting the kit but, I would like a double walled 26″ rim added to the hub motor please.

Just wondering what type of connectors come on the motor controller? I am ordering my battery and need to know what kind of connectors it has. Do you have any pictures or description?

Sponsorship Hub Motor Controller Opportunity for University Car Team

Posted by on April 1, 2025 No comments

My name is philip young and I am reaching out as a representative of Eco Illinois SAE, a student organization at the University. As an organization under the Society of Automotive Engineers (SAE) umbrella, we design and build a car to compete in the Shell Eco-Marathon and SAE Supermileage competitions each year. We attempt to push the boundaries of fuel efficiency and have achieved a school record of 1,137 mpg on gasoline at SAE Supermileage 2016.

Eco Illini SAE is comprised of students from a wide variety of backgrounds. From engineering to business students, the team focuses on providing environmentally conscious transportation solutions. To reach greater heights, the team is seeking to build a new car. The new car will incorporate lessons learned from past cars and be better suited to take advantage of new technologies. We pursue an aggressive vision for the future where the social cost of personal mobility is minimized. To further incorporate sustainable principles in society, we also participate in community outreach events and donate our old cars to other teams in order to encourage interest in sustainable engineering.

However, an undertaking of this size requires a lot of parts, funds, and time. One of our biggest roadblocks so far has been lacking the necessary resources to test and redesign the car for maximum efficiency. We are reaching out to Leaf Bike because of your specialization in electric bike motor and motor controller. Any help at all would be very much appreciated, and we would love to set up a sponsorship partnership with you. Attached to this email is an outline of everything a sponsorship would entail per each level.

Last year’s Shell Eco Marathon competition in Sonoma, California saw 100 teams with over 1,000 participants from high schools and universities across North and South America. It is part of Make the Future California – a four-day public festival of ideas and innovation. Each year our car is featured at the McHenry County College Green Living Expo, Engineering Open House, and various other University related events, with the car being viewed by hundreds to thousands of people. Not only are these events a great way to showcase the progress the car has been making throughout the year, they are also a fantastic opportunity for the team to give back to our sponsors. We also recognize our sponsors in public posts and are looking to start a video series featuring our technical innovations as well as shout outs to our sponsors.

1500watt ebike hub motor question

Posted by on April 1, 2025 No comments

I am searching for electric hub motors that I might be able to use for my device, far different than a bike.
Your 1500 watt hub motor caught my eye, and I am wondering what the outside hub diameter is?If this might work for me, I’d modify it to work for my situation, so the measurement I am looking for is the outside of the drive hub itself (the hub holding the magnets, magnets located on the inside of the hub) I’d eliminate the shield stuff on each side, to help us get the heat shed better.

Do you manufacture these hub motors, or are they purchased? Are they made in the US?

Our equipment is currently powered with 3-Phase AC motors, but I can get more power for less weight with dc motors. Unfortunately, my target rpm is around 140, probably using near 1000 watts at that speed.BUT,if these motors could come close, I’d want to explore what we might do with them.A perfect diameter for us would be less than 6 inch, but this likely isn’t the case.So, getting one or two in hand will let me contemplate things.

I was able to see the charted details for the motor! I note it is max efficiency at 550 rpm, which is too fast for my equipment.I wish to find a direct drive hub motor with decent efficiency at 120 to 200 rpm.As pointed out, my equipment is for a good purpose, and we have potential for 20,000 units per year, and more, reaching that in 2 to 4 years.

Would they consider making a bike motor running at slow speed (adding more poles)? Or is it possible with a step style bike motor? Because these run 24-7, and are built to run for years at a time. I am seeking to have reasonable life expectancy of the motors to be around 8 to 12 years.This is why I am seeking to have direct drive.This bike motor gets installed in a water-tight container, and operates underwater. Cooling will be provided by direct contact to the underwater container.It is very allowable to have a longer length, but if they can hold the 150 mm diameter as a maximum, the length could be almost 310 mm if this would help. I can go up to a weight of 50 kg, if the controller doesn’t weigh very much.

Thank you for following up on this.I would really like to find a bike motor supplier for us so we can go to a direct drive unit and avoid the use of a gearbox.

28 inch 48V 52V 1500W rear wheel electric hub motor kit

Posted by on April 1, 2025 No comments

28 inch 48V 52V 1500W rear wheel – electric hub motor kit

More info about this 28 inch hub motor kit

Main Features:
>. Rim: 28 inch double wall Alloy (Rim Fit For: 28 × 1 1/2″ tire)
>. Spoke: 12 gauge / 184mm Length × 36 pcs
>. Default: Black spokes
>. Optional: Silver spokes — Please leave message.

>. Engine: Bldc hub motor
>>. Voltage: 48V / 52V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 75.0 kmh — 46.6 mph Default (Optional other speed: 35mph or 25mph,15mph…please leave message)
>>. Mechanical brake: Disk or V
>>. Sprocket: Freewheel or Cassette
>>. Cable location: shaft end, LEFT
>>. Cable length:100cm / 40″ — Update “3mm phase wires” & “Newest version hub”
>>. Install: spacing of Min 135mm to Max 155mm fork
>>. Noise: < 60 db >>. Surface: Black painted

>. Driver: brushless controller
>>. MOSFET: 18 PCS
>>. With LCD: YES
>>. Rated Voltage: DC 48 / 52 Volts
>>. Min. Voltage: DC 40 ± 0.5 V
>>. Rated power: 1500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 40 A ± 1 Amps
>>. Thermal: aluminum shell and the substrate
>>. 3 phase 120° brushless motor
>>. Operating Conditions: -20~45 °C
>>. Waterproof design
>>. Size: 155 mm L × 72 mm W × 38 mm H

With LCD, More Function:
* Cruise — Green button Control (While motor is working,press green button one time,it will be “CRUISE” – running as the same speed)
* Reverse — Yellow button Control (“Left side & Mid / forward — “Right side / backward”)
* Kmh / mph
* Throttle speeds ( 0 – 5 ) — “0” is off throttle. “1” is the slowest. “5” is the fastest.
* Pedal assist speed ( 0 – 5 ) — “0” is off pedal assist. “1 ~ 5” is the fastest. ONLY one max speed. If hope pedal with 5 kinds of max speeds, please choose the other controller of ours. Please click below link:
https://www.leafbike.com/products/diy-bike-conversion-kit/28-inch-48v-1500w-rear-electric-hub-motor-kit-1465.html
* …

Package Content:
1 x 28 inch 48V 52V 1500W rear hub motor wheel
1 x 48V 52V 1500W 18-MOSFET motor controller
1 x LCD
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise .. ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 900mm

Net Weight: 11.7 kg
Package Size: 66cm L x 66cm W x 25cm H
Package Type: Cardboard Box

This 28 inch bike motor kit can handle with a 48V or 52V battery.