Tag Archives: bike conversion kit

Technical problem with a 20 inch 48V 1000W bike kit – problem solved

Posted by on April 5, 2025 No comments

Today I hit in a technical problem with the 20inch 48V 1000W bike conversion kit (Item ID:#LBCK20481000FN). I was riding for a shorter distance steep uphill in level 5 and suddenly the bike motor was making an obscure humming sound and was vibrating very strong. So I stopped immediately and shut down the system. I checked the hub motor and the cable for overheating but they where just with normal temperature. After a while, I already turned to go back downhill, I started the system again but the problem still exists. It seems that it is maybe a problem with the controller because now there is no reaction in changing the power level (1-5) or turning the throttle on. The hub motor gets only around 10 Amps with a max. of 590W (measured with a installed Amp/Volt meter in between). When starting pedaling or with the throttle with low speed the vibrations are immense but when I gain more speed the vibrations are reducing to a lower level but they are still there. When staying still and pull the throttle full, so the tire normally can spin free, only the vibrations and a loud humming sound exists. I know I do not have any warranty more leftover on this system but maybe you have an idea how I can repair this for a budget price.

I already solved the bike conversion kit system problem.
Funny what unexpected small things could cause some different technical reactions. The problem of the bike conversion kit problem above was, that one of the 3 phase cables to the motor was broken. By the effect of the depicted problems above I really thought that something in the controller was burnt-out but happily I could find the broken cable very soon so now everything
works fine again.

Hub motor or controller short circuit fault

Posted by on April 4, 2025 No comments

I purchased a 29 inch 1500 watt rear hub motor kit before you sold the kit with sine wave controllers 5 years ago. I love your hub motor. It’s very fast and powerful. I think your hub motors are the best in the world. I have recommended your bike motor to many of my friends. I
am going to buy a new 29 inch bike motor kit.

I am writing because I get a hub motor or controller short circuit fault message on the display when I use the walking feature. I hear a thumping noise when I use the throttle, but the motor doesn’t spin. Does this mean the problem is with my controller or with my motor?

Usually, this phenomenon may be caused by the following situations.

1. Caused by a short circuit between the positive and negative poles of the power supply. The positive pole of the power supply is connected to the negative pole, and the negative pole of the power supply is connected to the positive pole.

2. The voltage of the battery is too high, exceeding the maximum value of the controller capacitor, causing instantaneous breakdown of the capacitor.

Of course, it is also possible that the circuit board of the controller was not cleaned thoroughly, and the solder beads caused short circuits between electronic components.

The issue comes from hub motor controller.
If possible,open this controller and check if the capacitor has been burned out. It’s easy to open this controller box. Only use a screw driver to take off 4 screw nuts per side. Then can take the PCB out of controller.

Can re-test it as below:
Connect hub motor controller ‘s red and black power wires together. Discharge the electricity from the capacitor. Then re-connect them to battery power wires.

leaf 20 inch 48V 1500W rear hub motor – bike conversion kit

Posted by on April 3, 2025 No comments

Q: Regarding: Newest 20 inch 48V 1500W rear hub motor – bike conversion kit works on any bike.

What is the max current of the hub motor controller at 48V?
Is the controller programmable to other max current settings?
Does the LCD display show power either in watts, or volts and amps?

A: It’s max 40A
This bike motor controller can set other max speed.
Yes,LCD display power

Q: If I order just the hub motor, can the 1500W rear hub motor have a 10K NTC thermistor installed in it?

A: This 1500w hub motor with 10k themistor (It’s default)

Q: I have a 135mm fork. Can the Shimano Freewheel, 7 Speed, 14-28T be installed on the hub motor and still fit within 135mm?

A: Shimano 7 speed screw-on sporket can be install this hub motor.(TZ-21) – It’s default. Also,fit for 135mm fork.
If other shimano 7 speed cassette sprocket,need to modify hub motor.(We still can make.)

Q: Thanks. Do you sell a Shimano sprocket with an 11 Tooth (11T) that would fit the 1500W rear hub motor?
Q: Can you list the description of each wire in the hall/temperature connector pictured below?
red – ?
black – ?
yellow – ?
white – ?
green – ?
blue – ?

A: Red +
Black –
Yellow – W
White – Temp
Green – V
Blue — U

Q: What parts is includes on this 20 inch 48V 1500W rear bike motor kit?

Package Content:
1 x 20 inch Newest 48V 1500W rear hub motor wheel
1 x 48V 1500W 12-MOSFET motor controller
1 x LCD ( display speed, mileage, battery gauge.. )
1 x Twist throttle — Cable length: 1500mm
1 x Brake levers — Cable length: 1500mm
1 x Three button switches ( control cruise, regen brake, reverse .. ) — Cable length: 1500mm
1 x Pedal assist — Cable length: 1500mm

Net Weight: 11.0 kg / 24.2 lbs
Package Size: 50cm L x 23cm W x

50cm H / 19.7″ L x 8.7″ W x 19.7″ H
Package Type: Cardboard Box

700c 48V 1500W rear hub motor – bike conversion kit

Posted by on April 2, 2025 No comments

Q: 700c 48V 1500W front hub motor – bike conversion kit
Item ID #LBCK700C481500FN

Newest 700c 48V 1500W rear bike motor – conversion kit
Item ID #LBCK700C481500RN
What is the difference between these 2 bike conversion kits?
Can I get them with black spokes?
What is the winding (such as 12T, 8T, 6T, etc)?
Does it come with sprockets (rear cogs, or cassette)? If not, what kind do I order for it?
How much does it cost and how long does it take to ship to California, USA?

A: 1.They are the same motors.
LBCK700C481500FN is fit for 100mm rear dropout. Fit for front fork. Can’t use disk brake. ONLY use V brake on rim.
LBCK700C4815000RN can be installed sprocket on this motor. Fit for 135mm rear dropout. Fit for rear fork. Can install disk brake on rear motor. Also can use V brake on rim.

2. Black spokes ,, okay.. But it takes about 3 days to wait for this black spokes (Please leave message when you order)

3. Default: 5T. But we can make 6T, 8T … (Please leave message when you order)

4. LBCK700C481500FN can’t use sprocket.
LBCK7004815000RN can install sprocket. But Not come it. You can install yours on our hub motor. (Please leave message when you order rear cogs or cassette, then we can make motor as your sprocket. If No message, default: motor with screw thread for cogs

Q: You said:”3. Default: 5T. But we can make 6T, 8T … (Please leave message when you order)”
I have not read about an odd number such as 5T. Is this correct that your default is 5T?
Also, Do you have a right half twist throttle available for this instead of the right full twist?

A: Generally 700c 48V 1500W hub motor,use 5T.
If you leave message: 5T when you order (or send an email to us after paid) – It must 5T.
Yes. We also have other throttle. Please click below site. All throttles are fit for this bike conversion kit LBCK700C481500RN.

Also, leave message: what throttle. We will ship it instead of that full twist.

Interested In Buy This Hub Motor

Posted by on March 31, 2025 No comments

Q: I am very happy in viewing your electric bike rear direct drive with
26 inch hub motor wheel item ID # LBM26481500RN. My e-bike setup is 60 volts. Do you
manufacture 26×2.0 inch wheel with 60 volts 1500W rear direct drive
hub motors?
Secondly, also can you fit the bike motor in a fully BLACK rim without any
silver around the rim so it can match with my front wheel because I
use hydraulic disc brakes?
If there is anything that you need to ask me that I am missing, please
feel free to ask, that the purchase moves smoothly and correctly.

A: This 26 inch 48V 1500W rear hub motor wheel can work at 60V.Also,we can spoke this hub motor with all black color rim.

Q: Just a few more questions before I buy, because everything needs to be correct.
Can this bike motor fit any size frame bike?
Is it suitable for regenerative braking?
Does it have three phase hall sensors?
Can it fit 8 gear cogs? Which I am using at the moment with my old motor.
Please tell me the total length of the motor axle from end to end
because I’m using a rear rack ?

A: This 26 inch bike motor is fit for 135mm rear dropout. If your motor controller with regenerative braking function, will have it. It’s three phase with three hall sensors. One cable with 9 wires: heavy yellow, heavy blue, heavy green wires are motor phase wires. Thin red +5V, thin black / GND. Thin yellow, blue & green three wires are connected to three hall sensor.
It can fit for max 7 speed for 135mm dropout. If your frame can be larger, about 140mm,install 8 speed on this rear hub motor is no problem.
Total length of this shaft is 210mm.

missing thread of hub motor shaft

Posted by on March 31, 2025 No comments

It took a little work since spacing was tight, but I get the hub motor wheel inside of my forks. When I went to put the nuts on the axle, I saw that the bolt on the wired side is cracked. It is missing almost all of its thread which means I cannot but the nut on to hold the wheel in place. Essentially, I cannot use it at all. Please see the picture of the cracked bolt.

I was wondering if you know how I am able to repair this hub motor ‘s shaft or if I can somehow get some help on this? I spent a lot to get it all here and it is a little upsetting that a small chip is preventing me from using it at all. I’m not asking for a whole new electric hub motor wheel to be sent, just hoping I can get this bike conversion kit up and hub motor running. Please advise.

If possible, add some washers,then can solve it.

Do it as below:
Disconnect that white big plug,then can take off screw nut and add some washers into.
*. Look for a pin
*. There are five wires in this white big plug
*. Press each wire’ s pin, then the pin will out of white big plug.

I had thought I got bike conversion kit to work but there just is not enough room to to secure the nut properly. Please let me know what will be the best way to have this resolved. Sorry for the inconvenience on this.

Add washer or torque arm or lock washer.

BMX 20 inch 48V 1500W rear hub motor electric bike conversion kit

Posted by on March 31, 2025 No comments

BMX 20 inch 48V 1500W rear hub motor electric bike conversion kit

More info about this 20 inch BMX motor kit

Main Features:
>. Rim A: 20 inch double wall Alloy (Rim Fit For: 20 × 1.5″ / 1.75″ tire)
>. Spoke: Silver 12 gauge / 68mm Length × 36 pcs

>. Rim B: 20 inch double wall Alloy (Rim Fit For: 20 × 1.95″ / 2.0″ ~ 2.5″ tire)
>. Spoke: Black 12 gauge / 72mm Length × 36 pcs

>. Engine: Bldc hub motor
>>. Voltage: 48V
>>. Power: 1500W
>>. Efficiency: 90.5%
>>. Max speed: 34.2mph
>>. Mechanical brake: V
>>. Sprocket: single speed freewheel
>>. Cable location: shaft end, Right
>>. Cable length:150cm / 60″
>>. Install: spacing of 110mm rear 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: 1500 Watts
>>. Casing material: aluminium
>>. Maximum Current: 40 A ± 2 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 — 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
* Max speed ( 0 ~ 72 kmh )
* Pedal assist ( 1 – 5 )
* …

Package Content:
1 x BMX 20 inch 48V 1500W rear hub motor wheel (Fit for 110mm rear dropout)
1 x 48V 1500W 12-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: 11.0 kg
Package Size: 50cm L x 50cm W x 23cm H
Package Type: Cardboard Box

This 20 inch BMX bike kit can work with a 48V battery.

24 inch 48V 52V 1000W rear hub motor bike conversion kit

Posted by on March 31, 2025 No comments

24 inch 48V 52V 1000W rear hub motor – bike conversion kit

More info about this 24 inch hub motor kit

This 24 inch bike motor kit combines the full E-bike technology: direct drive Brushless Gearless high torque hub motor to change almost every bicycle into a personal electric bike. Save energy, protect environment and save money with a lot of fun. Saving 10% of electricity, Improve the efficiency of 8% With The Newest Materials Steel Rotor.

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 / 52V
>>. Power: 1000W
>>. Efficiency: 90.5%
>>. Max speed: 80.1 kmh — 50.3 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 / 52 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: 105 mm L × 72 mm W × 38 mm H

With LCD, More Function:
* Cruise
* Forward & Backward (Optional)
* Kmh & mph (Optional)
* Battery gauge
* 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/24-inch-48v-1000w-rear-hub-motor-kit-1548.html
* …

Package Content:
1 x 24 inch 48V / 52V 1000W rear hub motor wheel
1 x 48V / 52V 1000W 12-MOSFET motor controller
1 x LCD
1 x Twist throttle
1 x Brake levers
1 x Three button switches ( control cruise .. )
1 x Pedal assist

Net Weight: 10.7 kg / 23.5 lbs
Package Size: 56cm L x 56cm W x 25cm H
Package Type: Cardboard Box

* This 24 inch bike motor kit system can handle with a 48V or 52V battery.

26 inch 48V 52V 1500W front hub motor bike conversion kit

Posted by on March 31, 2025 No comments

26 inch 48V 52V 1500W front hub motor bike conversion kit

Detail info about this 26 inch hub motor kit

Main Features:
. Rim A: 26 inch double wall Alloy Rim Fit For: 26 × 1.5″ / 1.75″ tire
. Spoke: Silver 12 gauge / 154mm Length × 36 pcs

. Rim B: 26 inch double wall Alloy Rim Fit For: 26 × 1.95″ / 2.0″ ~ 2.5″ tire
. Spoke: Black 12 gauge / 159mm Length × 36 pcs

. Engine: Bldc hub motor
. Voltage: 48V / 52V
. Power: 1500W
. Efficiency: 90.5%
. Max speed: 69.6 kmh — 42.9 mph Default Free customization other speeds: 35mph or 30mph, 25mph, 20mph, 15mph…
. Mechanical brake: V
. Cable location: shaft end, LEFT
. Cable length:150cm / 60″
. Install: spacing of 100mm 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: aluminum
. 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
* Reverse
* Kmh / mph
* Speeds 0 – 5 “0” is off. “1” is the slowest speed. “5” is the fastest speed.
* …

Package Content:
1 x 26 inch 48V / 52V 1500W front 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: 25.6 lb
Package Size: 62cm L × 62cm W × 25cm H
Package Type: Cardboard Box

This 26 inch bike motor kit can work with a 48V or 52V battery.

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.