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INTELLIGENT
EBIKE KIT

  • INTELLIGENT
  • FASHION
  • SIMPLE

KN20S→

Product Specifications

    Model
    KN20S
    Battery Capacity
    36V6Ah
    Cell Quantity
    20 cells
    Charging time
    3H
    Battery Type
    18650 power lithium ion battery
    Charger
    AC110V - AC220V,DC42V 2A
    Assist Range
    60km

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

    Top Speed
    32km/h
    Wheel size
    16" / 20" / 24" / 26" / 27.5" / 700c/ 29"
    Rated Power
    250W/350W
    Motor Structure
    Gear drive
    Motor Efficiency
    >80%
    Max Torque
    30N.m
    Wireless Connection
    Bluetooth 5.0 (Allows the controller to connect to multiple devices at the same time)
    Charge Socket
    Type C
    Product Dimensions
    Motor Weight
    2.6kg/2.55kg/3.25kg/3.45kg/2.7kg (250w Front/250w Rear/350w Front/350w Rear/250w Rear with torque sensor)
    Battery Weight
    1.35 kg
    Controller Weight
    0.34 kg
    Package
    71*71*22cm

PRODUCT ESSENTIALS

  • 5 MINS
    FAST INSTALLATION
  • 5 SMART
    ASSIST MODES
  • 250W/350W
    BRUSHLESS GEAR MOTOR
  • MAX SPEED
    UP TO 32 KM/H
  • ASSIST RANGE
    UP TO 60 KM
  • FIT FOR 12-29
    INCH WHEELSIZE

LVBU KN SERIES E-BIKE KIT

Smart E-bike wheel, just take 5 minutes to convert a normal bike into an E-bike
Beautiful bottle battery design/Assist range 60KM/Optional bluetooth display with thumb throttle/App control/Lost bike tracking/Smart assist system

INSTALLATION REQUIREMENTS

SIMPLE AND EASY INSTALLATION, JUST 5 MINS

  • REPLACE THE FRONT WHEEL
  • INSTALL THE BATTERY AND CONNECT
    THE CABLE WITH THE MOTOR

INSTALLATION REQUIREMENTS

OPTIONAL PARTS

  • BLUETOOTH DISPLAY
    (OPTIONAL)
  • BLUETOOTH CADENCE
    (OPTIONAL)

Fits Every Size Of Bike

KN series electric bicycle kit fits all standard bikes. It has multiple sizes from 16" to 29" and 700C

MULTIFUNCTION BOTTLE

Side power switch with a dust cover, a type-c charging port that doubles as a mobile phone charger, and a hidden battery level display screen under the cover.

LED DISPLAY

TYPE-C CHARGING
POWER SWITCH

KEYHOLE

BATTERY

The high-safety 18650 lithium battery features a portable and detachable design, comes in different colors, has an IP65 waterproof rating, can fully charge in 3 hours, and is equipped with a high-performance and high-safety BMS battery protection system.

  • Convenient
  • Battery safety
  • Fast charging

MOTOR

The LVBU 250W/350W BLDC motor is a small, light weight, efficient, and low-noise motor with planetary gear and clutch, providing stable performance, long life, and easy riding even when the battery is dead.

  • Power: 250W/350W
  • Efficiency (%): >80%
  • Structure: Gear Drive
  • Max Torque (N.m): 30-35

CONTROLLER

Micro Power system

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
  • DOWNHILL
  • AUTOMATICALLY
    INCREASE POWER
  • AUTOMATICALLY
    CUT OFF POWER

ARM Cortex-M3 main chip

with 6-axis gyroscope motion processing chip
Configure Bluetooth 5.0 Moduel
6 high-sensitivity speed-measuring magnets for precise speed measurement

ENJOY A HAPPY RIDE

Gps lost bike tracking
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.
IP65 waterproof grade makes you ride freely in the rain.

  • Lost bike tracking
  • Safety speed control
  • IP65 waterproof grade

APP

MAKE CYCLING MORE JOYFUL

You can use the APP to control the wheel, 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 and track the location through the lost bike tracking function.

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

PACKING LIST

1. Motor wheel 2. Battery and Controller 3. thumb throttle 4. Charger 5. Accessories 6. Manual

ENJOY SAFE RIDING

LVBU products have passed CE, ROHS, and MSDS certifications to ensure high safety and quality standards for the products.

Packing and Delivery

All LVBU products will be fully tested and packed well before delivery. And we have oversea warehouse for fast delivery in Europe.

Trade show

Products have achieved success in the global market by participating in popular exhibitions and developing distributors in various countries.

Welcome to send us your enquiry, we will contact you as soon as possible
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FAQ

What are the battery dimensions?

The battery is 235mm x 75mm.

Can I put the battery in my pannier instead of attaching it to the crossbar?

The battery holder must be positioned at an upward slope, therefore it’s best to be fixed on to your bike-frame. This is because there is a gyroscope inside it, which is part of the pedal assist technology.

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.

How long does the battery take to charge?

Approximately 3.0 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.
Will Lvbu kit fit my bike ?

LVBU kit will fit most bikes except thru axle. 

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 lvbu kit warranty policy?

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

Can I buy a spare battery?

Yes. We find the vast majority of people don’t need a spare, but if you want to go on very long bike rides you can double your range by charging a spare battery and taking it with you. You can purchase a spare battery here.

What’s included in the kit?

Wheel with 250W/350W motor, battery & battery holder, wired thumb throttle, instruction booklet, charger, tools for installation (allen key and wheel spanner).

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.

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 9kg.

What is the range of the battery?

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

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.
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. 

176 REVIEWS - KN Series Ebike Conversion Kit
Dan
United Kingdom , 6/11/2025
Got the motor to go on my wife's bike since she had difficulty on some of the longer rides. Now she's having more fun than me! Great product and a lot cheaper than buying a $2k e-bike.
Model: KN20S 250W front for Brompton, KN20S Front wheel ebike kit
Size: 16", 16 inch rim with tyre
Color: Red, Red
Gerald Nielsen
Finland , 6/9/2025
Hello, I bought it for my wives bike. After a install time of only about 15 minutes, I had to change out the tire and tube with the ones I picked out for her bike, it was up and running. I tested the bike for her for a few days before I sent her on her way. It met and surpassed all of my expectations. I watched and read many reviews online before ordering, so I had a pretty good idea of what to expect. After it passed my testing, I turned it over to Beth. Beth had seen me bike commute for the last 5 years , and wanted to try it herself in order to save money on gas, help the environment, get more exercise, and enjoy the pleasure of riding as I have. The problem was Beth has a chronic back pain, and it hurt her to put the force into pedaling all the time. After setting her up with the kit, on a bike that was comfortable for her, she has went from riding 4/5 times a year, to being a daily commuter. She runs all her errands by bike now. AWESOME job. The only thing that could be any better would be a bigger thumb trigger, it can be hard to tell if you are on the thumb trigger if wearing gloves.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Red, Red
Andrei Vlahov
Czech Republic , 6/6/2025
I bought a KN20S kit for my Brompton. The quality is much better than I expected, the installation took about one hour, maybe a little more. l had some issues, but I received instructions almost immediately. Now I can ride much more easily, the motor is very quiet and powerful, the battery capacity is sufficient for everyday use. The support and the communication are perfect, not to mention the price. The kit arrived as promised, very well packed.
Model: KN20S 250W front for Brompton, KN20S Front wheel ebike kit
Size: 16", 16 inch rim with tyre
Color: Red, Red
Cornel
United Kingdom , 6/6/2025
We purchased one kit from Miya. Within a week of installing it on Lori's bike, I purchased another set. We also tested them for distance, in our neighborhood, they will indeed carry you approximately 60km on flat ground as advertised. We also went biking on nature trails in the woods and Got approximately 50+ km. I plan to buy two extra batteries so we can go further on bike rides. This product works exactly as advertised no regrets! !!
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Red, Red
Ned Sterling
France , 6/5/2025
I wanted to keep up with my friend who is 20% faster than me. This does it!
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Black, Black
Richard G
Ireland , 6/4/2025
this whole experience from the choosing the right one, to riding off in the sunset, was very simple and everything they claim it would be. Thank you!!
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 20", 20 inch rim with tyre
Color: Red, Red
Leon Verlinde
United Kingdom , 6/3/2025
I was about to sell my bike and get an e-bike. Glad I didn’t. This kit saved me a ton of money.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 16", 16 inch rim with tyre
Color: Silver, Silver
Rodney Aguirre
Ireland , 5/30/2025
Great product and working to open the horizon up again for someone in a wheelchair and uses a trike to get around. Bottle battery is awesome---- almost too much speed sometimes. DOn't get pulled over speedin!
Model: KN20S 350W 6Ah Rear, KN20S Rear wheel ebike kit
Size: 24", 24 inch rim with tyre
Color: Silver, Silver
Norberto
Slovenia , 5/29/2025
I’ve been using this kit for three weeks. Ride comfort has improved massively. I now arrive at work less tired, which is exactly what I hoped for.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Black, Black
Calvin Thomas
Netherlands , 5/28/2025
I’ve started cycling more just for fun. This kit made me fall in love with biking again.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Blue, Blue
sum goh
Canada , 5/27/2025
The quality is much better than I expected, it is very easy to install, the motor is very quiet and powerful, Now I can ride longer distance and have more fun. Mida also provided excellent after sale support. She provided accurate shipping info and patiently answered all my questions.
Model: KN20S 350W 6Ah Front, KN20S Front wheel ebike kit
Size: 700C (28"), 28 inch rim with tyre
Color: Black, Black
Torsten Sch?fer
Germany , 5/23/2025
Living in a small town in Germany, this makes getting to the grocery store and back so much easier. I barely use my car anymore.
Model: KN20S 250W 6Ah Rear Motor with Torque Sensor for Thru Axle, Thru Axle
Size: 700C (28"), 28 inch rim with tyre
Color: Black, Black
Clive Woods
United Kingdom , 5/22/2025
In London traffic, this kit helps me get around without breaking a sweat. It’s perfect for short commutes and navigating stop-and-go traffic.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Black, Black
Clare
Austria , 5/20/2025
I have been pleasantly surprised by this kit. I purchased the kit with bottle battery option and have been using it to help pull my kids on the tag along. It really helps for the hills or extra long rides and now we are more apt to bike than get in the car. The kids love it and call it "hyper drive". Just ordered a second unit for my wife's bike so all four of us can enjoy the ride. Install was as easy as promised and I am average at best at tinkering.
Model: KN20S 250W 6Ah Rear, KN20S Rear wheel ebike kit
Size: 24", 24 inch rim with tyre
Color: Black, Black
Andre Synnestvedt
United Kingdom , 5/20/2025
Super fast shipping. All components arrived in great shape, everything high quality! Easy fit and install, killer good customer service. Would highly recommend!
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 700C (28"), 28 inch rim with tyre
Color: Black, Black
Manuel Ramirez
Spain , 5/15/2025
Just wanted to say that this is a fun and practical product to put on your bike. It was very simple to put together and I definitely recommend it to anybody. Manuel Ramirez
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 24", 24 inch rim with tyre
Color: Blue, Blue
Lewis
Austria , 5/12/2025
Have a 250W conversion kit for two years now . Commute 25 miles a day. Battery is starting to show it's age but I still get about 20 miles out of a charge. Can't comment on customer service because I've never needed them. Just purchased a replacement battery.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 20", 20 inch rim with tyre
Color: Black, Black
Gary Herberson
Romania , 5/9/2025
2nd kit I have purchased, within the last year. No issues at all. Nice and weighty battery, not some cheap rubbish that come with my bike.
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 26", 26 inch rim with tyre
Color: Black, Black
David Randle
United Kingdom , 5/8/2025
Excellent service. My 36v 250w ebike kit is running smoothly. Their customer service is even more satisfying. Any questions? Ask them and they will help.
Model: KN20S 250W 6Ah Rear Motor with Torque Sensor for Thru Axle, Thru Axle
Size: 27.5", 27.5 inch rim with tyre
Color: Black, Black
Williams
Australia , 5/7/2025
Ordered 2 kits for my assist bikes from LVBU! Honestly I cannot be happier thank you lvbu wish I knew about you sooner, will defo use you again x
Model: KN20S 250W 6Ah Front, KN20S Front wheel ebike kit
Size: 24", 24 inch rim with tyre
Color: Silver, Silver
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