People also liked:
Intro / Spec / Review / FAQ / Manual / Video / Photo

Lvbu KX series All in One Ebike Kit

Without any cable, extremly CLEAN
Convert any bike to an ebike in minutes

Fully wireless / Smart Asssit system / High Efficient Output Arrangement /
Assist Range upto 90KM/ Induction cut off system / Built in Gyroscope /
Road Slope degrees detection / All Terrain Application / Anti-theft tracking

  • (optional)
  • (optional)
  • 3 minutes

    Fast installation

  • 16-29inch

    Multiple Rim Sizes

  • 5 modes

    Intelligent assist modes

  • 32km/hour

    Maximum speed

  • 250W

    High-speed Brushless motor

  • 2 drive ways

    Throttle / Pedal assist

Product Specification

    Model
    KX20S /KX30S
    Battery capacity
    36V 6Ah / 36V 9Ah
    Cell quantity
    20 cells / 30 cells
    Charging time
    3.0H / 4.5H
    Battery type
    18650 power lithium ion battery
    Charger
    AC110V-AC220V, DC42V 2A
    Assist range
    60km / 90km

    *The assist range is under conditions: 60kg weight rider, ouside temperature 25C,no wind, 50% assist level under manual mode, tires with enough air pressure, riding on flat level road

    Maximum speed
    32km/h
    Rim size
    16" / 20" / 24" / 26" / 27.5" / 29" / 700C (28")
    Rated power
    250W
    Motor structure
    Gear drive
    Motor efficiency
    >80%
    Max torque
    30N.m
    Hub dimensions
    Net weight (including rim&tire)
    7KG /7.5KG
    Package dimensions
    70*70*20cm

Just 3 minutes, transform your bike into an ebike

KX series all in one wheel ebike kit does not have any cable or external sensors at all. It's a fully wireless ebike conversion kit. Just 1 step to convert: Replace the front wheel.

INSTALLATION REQUIREMENTS

KX series can fit most of the bikes

It can fit Mountain bikes, Road bikes, Folding bikes, City bikes, Trikes and etc. It has rim sizes from 16" to 29" and 700C.

High quality 18650 lithium battery

EV lithium-ion battery cell with internal resistance as low as 18mΩ, capacity of 2900mA, 3C high-rate discharge. The 18650 power lithium battery offers consistency, high energy density, and faster charge/discharge performance. Tried and tested over time, 80% capacity remains after 1000 cycles, making this high-quality lithium battery’s lifetime more than 5 years.

Using high-performance and high-safety BMS battery protection system

  • Over-discharge protection
  • Overcurrent protection
  • Temperature protection
  • Overcharge protection
  • Short circuit protection
  • Battery balance

250W high speed brushless permanent magnet motor

Compact size, light weight, high efficiency, stable operation, long life
Planetary gear and clutch: It's easy to ride even when the battery is dead.

250W
Rated power
500W
Maximum power

Power :  250W
Voltage : 36V
Structure :  Gear Drive
Efficiency :  >80%
Maximum torque :  30N.m

Closed all in one hub design
Easy Clean Simple

KX series integrates battery, motor, controller all into the hub. You can turn your bike into an ebike with everything hidden in the front wheel and keep the original design of your bike without any cable connections or accessories at all.

Micro power system

9 years of research and development has gone into creating a versatile and cost-effective product for cyclists. The micropower system offers intelligent assistance with induction brakes that have a response time of 10ms. The system can sense the speed, acceleration and road slope, it will help you automatically when you pedal.


Uphill
Increase power automatically

Downhill
Cut off power automatically

ARM Cortex-M3 main chip

With 6-axis gyroscope motion processing chip
Configure Bluetooth Low Energy 4.0
10 pieces of high-sensitivity speed measuring magnets for precise speed measurement

5 smart assist modes

We have spent 9 years on developing and optimizing the assist system. The assist system is based on the speed, acceleration, the road slope, and also the assist level that you set in the APP or on the Bluetooth display, calculating out the power you need. It will assist you automatically when you pedal. And we will keep on optimizing the system and publishing it from time to time. You will be able to update the system via the APP.

  • Leisure mode
  • Commute mode
  • Exercise mode
  • Manual mode
  • Climbing mode

Dedicated APP provides you wonderful cycling experience

You can use the APP to control the wheels, upgrade the firmware, set the assist mode, set the assist level, calibrate the gyroscope angle, and detect the fault. And also you can check the speed, temperature, power, mileage, etc.

Anti-theft Tracking Function: Lost bike tracking. You can report lost when your bike is stolen.

After you report lost, once the thief tried to connect the wheel with the APP, the system will locate the mobile phone, disable the motor immediately and upload the information to the server.

Speed up to 32km/h
Speed limitation is settable in the APP.

The default maximum speed is 25km/h, you can set the speed limitation up to 32km/h in the APP.


Overspeed alarm makes it safer to ride

You can set the overspeed alarm value in the APP. It will alram when the speed is over the value you set.


IP65 waterproof grade

IP65 waterproof grade makes you ride freely in the rain.

Axle end charging port, simple and convenient

Charging time: 3 hours (KX20S), 4.5 hours (KX30S)

Packing list

Welcome to send us your enquiry, we will contact you as soon as possible
The message will be saved after closing the window
 
 

FAQ

Do I need a mobile phone to operate my bike?

No, using your mobile phone is your choice. If you want, you can download the Wepower app, where you can set the pedal assist mode, see the speed, temperature, battery level and mileage covered. But this is entirely optional, and the bike will function perfectly without it.

My bike has disc brakes – will the kit still work?

Yes, the kit fits both V brakes (sometimes called rim brakes) and disc brakes.

How does the pedal assist work?

The kit has an “intelligent assist control module” which works in conjunction with a gyroscope calculating the power you need.  It will assist you automatically when you are pedalling.  The motor will not work until the speed reaches 5km/h. The system will increase the power when you go uphill and will shut down the motor when you are going downhill.  When you brake, the system can detect the decrease of the speed, and will stop the motor.

If you push the thumb throttle the bike will be fully driven by electric power, but when you release it the pedal assist system will kick in again automatically.

Will Lvbu kit fit my bike ?

LVBU kit will fit most bikes except thru axle. 

Is the import taxes included in the price? Do I need to pay taxes when I receive the ebike kit?

If the delivery address are in the countries below then you don't need to pay any taxes or VAT:

United Kingdom, United States, Canada, Australia, Russia, France, Germany, Italy, Spain, Sweden, Denmark, Ireland, Belgium, Netherlands, Czech, Republic, Austria, Portugal, Slovakia, Slovenia, Hungary, Bulgaria, Estonia, Greece, Poland, Lithuania, Finland, Latvia, Croatia, Ukraine.

How much does the kit weigh?

The entire kit weights 7kg/7.5kg.

How long is the lifetime of the battery?

Lvbu ebike kits use EV 18650 lithium-ion battery cells with class A quality. Working with our own BMS system, the lifetime of the battery is very high. 80% capacity remains after 1,000 cycles. So normally it can last 5 years.

*Note: The definition of one cycle is that charge the battery from 0 to 100% and discharge it fully. For example, if you charge the battery from the 0 to 50% and discharge it to 0, that is 0.5 cycle.

How to connect Lvbu kit with the APP?

Open the APP and allow all the permissions that the APP asks for. And tap the magnified glass icon on the right top of the APP to search for the Bluetooth address. Select the right address of your kit in the list to connect.
 
*Note: Please connect the kit in the APP, don’t connect it in the operation system of the phone. You don’t need to input any pin to connect. And please make sure all permissions are allowed and the kit is not connected to other devices. The kit can just connect to only one device at the same time.

How does Lvbu wheel recognize uphill?

Lvbu wheel has a built-in six-axis gyroscope, which can sense the slope of the road such as uphill and downhill. But if you want to detect the slope of the road correctly, you must calibrate the gyroscope angle on the level ground first. The way how gyroscope works is as below: 

  • The purpose of calibrating the gyroscope angle is to give the gyroscope a horizontal reference, telling the gyroscope that the current angle is level, so that the gyroscope can detect the slope. 
  • If the gyroscope is calibrated on a downhill road, the gyroscope will regard the downhill road with a certain angle as a horizontal road, but when the bike is on a level road, the gyroscope will sense it as an uphill, in that case the motor will always provide assistance; 
  • If the gyroscope is calibrated on an uphill road, the gyroscope will treat this uphill road as a horizontal road. And when the bike is on a level road, the system will shut down the motor because the gyroscope sense the level road as a downhill road by mistake.

    Therefore, you must calibrate the gyroscope on a level ground, otherwise there will be problem with the assist system.
How to connect LVBU ebike kit with Bluetooth display?

BTC02 Display Connect Method:

  • Please turn off or disconnect the Bluetooth connection on your phone before the Bluetooth display connects to the LVBU Wheel. The wheel cannot connect to more than one device at the same time; 
  • Press the power button of the Bluetooth display to turn it on. Then press the power button three times continuously. The display will search for the Bluetooth address of the lvbu ebike kits nearby; 
  • After the display finishes the search, press the up and down keys to select the right address of your kit and press the power button to connect.

DW03 Display Connect Method:

  • Open the APP and connect it with the Lvbu ebike kit
  • Press the power button of the Bluetooth display to turn it on.
  • Tap the "device" icon at the bottom right in the front page of the APP-->Tap "Add Device"--> Select the display in the list to connect.
What is lvbu kit warranty policy?

For battery, motor and controller, we provide one year warranty.

Do I have to use the thumb controller?

No. The thumb controller is your choice. We find that some of our customers prefer not to use the thumb controller and that’s fine, the bike will automatically work on the pedal assist mode.

What if I don’t know my wheel/tyre size?

This is a common question.  Your tyre size should be written on the side of your tyre.  There will be a series of numbers showing the diameter and width.  It will look something like this: 700c x 38.  Occasionally different cycle manufacturers will use a different scale.  If you have any problems working out your tyre size, please call us on +86 199 7018 0785.  Alternatively, you can email us a picture of the writing on your tyre to miya@lvbu.tech

Does the kit accommodate hydraulic brakes?

Yes it does. The kit will automatically sense when the brakes are applied and cuts the power to the motor.

How long does the battery take to charge?

Approximately 3.0 hours/4.5 hours at the mains.  The battery comes with a charger.

How does Lvbu kit system work ?
  • Lvbu assist system is an intelligent assist system which can calculate out and provide the proper power based on the speed, acceleration, the slope of the road, and the assist level set in the APP or display. It will provide proper power automatically when you pedal. The motor will not work until the speed reaches 5 km/h. 
  • It will increase the power when it senses the acceleration is positive and decrease the power when it is minus. The system will also increase the power when going uphill and shut down the motor when going downhill. And the kit can also be controlled by the optional wireless thumb throttle. When you push the throttle, the bike will be fully driven by electric power, but when you release it the assist system will kick in again automatically. The introduction of the 5 assist modes is as following:
     * Manual mode: The most often used mode. The users can set a proper assist grade from 0 to 99 for themselves. 0 stands for no assist while 99 stands for the strongest assist. Under the manual mode the user can use the optional wireless display to set the assist grade instead of using smart phone. After setting the assist grade, the wheel will assist automatically.
     * Commute mode: Under this mode, the wheel will have relatively strong assist power all the time. The output curve of the assist grade is as shown above. It is similar to an assist grade of 60% in the manual mode.
     * Leisure mode: The assist power output is as the curve above. It is a curve similar to a damping ratio. Half an hour is a cycle. At the end of the cycle, the assist will become stronger.
     * Exercise mode: This mode has a small assist output. One cycle is also half an hour. After about 10 minutes, the assist power output will become stronger in the rest of the cycle.
     * Climbing mode: The wheel provides a certain assist grade only if the road is uphill that above a certain slope angle. The assist grade and the slope angle can be set in the APP. For example, when you set 2 degrees and an 80 assist grade, the wheel can give you an 80 assist grade when you are on the road with slope angle above 2 degrees.

     Note: Lvbu's intelligent assist system can be upgraded by the APP. We will keep optimizing the algorithm and publishing the new firmware.
Is Lvbu kit compatible with V brake?

Yes, Lvbu kit is compatible with rim brakes and disc brakes.

And a free new disc can be provided if you need.

Is it safe to use the front wheel drive?

Yes, it’s safe to use the front wheel drive. 

The power of the front wheel motors those lvbu ebike kit use are between 250w to 350w, so there is no safety problem. Actually, there are some advantages to using front motor drive: 

 It is more efficient to pull the bike compared to push the bike.

 The front motor will balance the weight of the front wheel with the rear wheel to make it stabler

 It is much easier to install the front wheel than the back wheel.

What are the functions of the APP?

The APP has two main kinds of functions as following: 

  • Set the parameters:
    ①Search and bind the Lvbu ebike kit: You need to search and bind the kit with the APP when you use it first time.
    ②Calibrate the gyroscope angle: The gyroscope angle must be calibrated after the first time you attach or reattach the kit to your bike.
    ③Set the assist mode or adjust the assist level.
    ④Set over-speed alarm.
    ⑤Set the maximum assist speed (speed limit).
    ⑥Lost report.
    ⑦Firmware upgrade.
    ⑧Restore factory settings.
    ⑨Set the wheel weight, load, wheel size, etc. ...
     After adjusting and setting the parameters, the system will automatically save values instantly.
  • Show cycling data:
    ①Riding speed
    ②Riding mileage: total mileage, current mileage, uphill mileage, etc.
    ③Kit model
    ④Bluetooth address
    ⑤APP version
    ⑥User instructions ...
    We are keeping optimizing the APP all the time, the new version of the firmware and the APP will be released from time to time, you can update it anywhere with the network of your mobile phone.

Do I have to connect to the APP while riding?

No, you don’t have to connect the kit with the APP when you are riding. The assist system is written in the controller, not in the APP. But before the first time you use it, you must calibrate the gyro angle for the bike.
You can set the assist grade in the APP and put your phone in your pocket. The kit will provide proper assist power for you automatically.

What is the range of the battery?

The battery is a high quality power lithium-ion battery, 36V, 3/6/9AH. The range is approximately30/60/90 km+. But that does depend on many various factors, including terrain, slope, your weight and how much you pedal and your level of assist.

Do you have a local dealer or oversea warehouse?

Yes, we have oversea warehouse in Europe.

And for some countries, we do have local dealers. 

225 REVIEWS - KX Series Ebike Conversion Kit
Kirk
Slovenia , 6/28/2025
The kit works very well on my 20" Stowabike and I can highly recommend this company.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 20", 20 inch rim with tyre
Battery: Black, Black
Terry
Finland , 6/26/2025
Excellent. I'm older and was not using my bike as much as I would have liked, but now I feel I can get back to riding again. I have added a computer to it to keep an eye on distance, speed, etc. It's perfect for what I wanted. Thanks guys.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 27.5", 27.5 inch rim with tyre
Battery: Black, Black
Ivan ?eparovi?
Norway , 6/25/2025
Wow purchased for my wife we live 5 miles from town down hill and 5 miles up hill home. It is great. Lvbu is great.
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 26", 26 inch rim with tyre
Battery: Black, Black
MARK & CINDY MCQUAIDE
United States of America , 6/24/2025
I BOUGHT THIS FOR MY WIFE WHO COULDN'T KEEP UP WITH ME. SHE WAS SUPPOSED TO ONLY USE THE MOTOR ON HILLS ONLY, BUT NOW SEE'S 1/4 AHEAD OF ME. NOW WHERE SPENDING MORE TIME TOGETHER,THANKS FOR A GREAT PRODUCT. MARK & CINDY MCQUAIDE
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 700C (28"), 28 inch rim with tyre
Battery: Black, Black
Nkateri
Finland , 6/23/2025
A totally satisfied customer!!
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 29", 29 inch rim with tyre
Battery: Black, Black
Christopher Fraser
Canada , 6/20/2025
the kit is an excellent product and delivers what it promises. it is a perfect fit for people who want the flexibility of turning a regular bike into an ebike in minutes and who don't mind controlling the assist with a thumb. it was purchased for my wife, and she loves it. Happy wife, happy life. Thanks!!
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 26", 26 inch rim with tyre
Battery: Black, Black
ryan
Lithuania , 6/19/2025
I got the basic 36 volt kit, it is everything I expected it to be. I use it mainly to kick in and take the drudgery out of the hills (as an assist motor), but it also totally holds its own as a lazy-rider’s motorized bicycle, easy-peasy.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 26", 26 inch rim with tyre
Battery: Black, Black
Jesse S.J.
United States of America , 6/18/2025
After using this electric bike kit for a few weeks, I am very pleased with the performance of the product. I certainly would recommend this product to anyone. I am about to go through an entire WI winter with it. Im curious to find out how it holds up to very cold temperatures and snow. I ride everyday in all types of weather, so it's very important that the this product does not fail me when faced with many different weather elements. So far, in the month of June here in WI, its been wonderful!
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 700C (28"), 28 inch rim with tyre
Battery: Black, Black
Fred Rodriguez
Canada , 6/17/2025
My wife and I have tricycles and ride them when we go camping. My wife has a problem going up hills, so that's why I purchased the motor for her tricycle.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 27.5", 27.5 inch rim with tyre
Battery: Black, Black
Dennis Cray
United States of America , 6/16/2025
I had one for a few years on my wife's bike , and it worked out well for her and she loves it. Since i ride more then her i decided to buy one more kit for my bike. The customer service techs are also very Great. Thanks for a Great product. Dennis Cray Kinston NC
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 24", 24 inch rim with tyre
Battery: Black, Black
Murray Hall
Finland , 6/13/2025
One of my favorite companies around... fabulous products, people, service. It's clearly all a labor of love, a true source of satisfaction and inspiration.
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 20", 20 inch rim with tyre
Battery: Black, Black
Orville Mullen
Australia , 6/12/2025
I've had to stop driving due to medical issues and i was going nuts being stuck in the house. I initially purchased and installed the KF one. Its been fantastic. i bought my wife the all-in-one KX that's pre-assembled. We've both been loving them.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 27.5", 27.5 inch rim with tyre
Battery: Black, Black
Neil Richards
Norway , 6/11/2025
The website is useful and easy to navigate. The service was quick and thorough. The only thing was the shipping time a little longer than expected
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 700C (28"), 28 inch rim with tyre
Battery: Black, Black
Floyd Gregory
New Zealand , 6/10/2025
It was easy to install but it took longer than a few minutes. I wish there was a presta valve option. The motor was not as strong as my friends e-bike but strong enough for my purposes, to give that boost when you hit that nasty climb or your legs are burning. The motor is strong enough to get you started even on an incline.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 24", 24 inch rim with tyre
Battery: Black, Black
Marshall Callahan
Australia , 6/9/2025
I LOVE the motor kit from LVBU. I use it every day. Great product!
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 20", 20 inch rim with tyre
Battery: Black, Black
Gavin Luna
Czech Republic , 6/6/2025
Installed on my wife's bike and she loves it. Her arthritic knees are forever grateful. Easy installation; people don't even realize the bike has an electric motor until she motors away without pedaling.
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 26", 26 inch rim with tyre
Battery: Black, Black
Kurt Hübner
Croatia , 6/4/2025
It gave new life to my old commuter bike. I ride more now, and it’s helping with my knee issues too.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 27.5", 27.5 inch rim with tyre
Battery: Black, Black
Lester Cole
Canada , 6/4/2025
Works great in rain and cold weather. Been riding around Toronto for weeks with no issues. Everything is sealed and reliable.
Model: KX30S 250W 9Ah Front, Ebike kit for front wheel
Size: 29", 29 inch rim with tyre
Battery: Black, Black
Chuck
Germany , 6/3/2025
I bought this for my wife as she has been talking about an electric bike for a while. She loves it so much she doesn't want to get off! She finds every excuse to take the bike on errands around town and even to the next town over!
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 700C (28"), 28 inch rim with tyre
Battery: Black, Black
RICHARD
Ireland , 6/3/2025
The conversion kits works great. Easy install.
Model: KX20S 250W 6Ah Front, Ebike kit for front wheel
Size: 24", 24 inch rim with tyre
Battery: Black, Black
Message success
Thanks for your message, Pls. pay attention to your email box. Have a nice day !
Hint