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Product Specifications

    Model
    KN20T / KF30T / KD30T / KD40T / KH50T / BZ50T / BZ60T
    Battery Capacity
    36V 6Ah /36V 9Ah / 36V 9Ah / 36V 12AH / 36V 15Ah / 36V 15Ah / 36V 18Ah
    Cell Quantity
    20 cells / 30 cells / 30 cells / 40 cells / 50 cells / 50 cells / 60 cells
    Charging time
    3H / 4.5H / 4H / 6H / 6H / 7.5H / 9H
    Battery Type
    18650 power lithium ion battery
    Charger
    AC110V-AC220V, DC42V 2A
    Assist Range
    60km / 90km / 90km / 120km / 150km / 150km / 180km

    *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" / 28" / 29" / 700c
    Rated Power
    250W
    Motor Structure
    Gear drive
    Motor Efficiency
    >80%
    Max Torque
    40 N.m
    Wireless Connection
    Bluetooth 5.0 (Allows the controller to connect to multiple devices at the same time)
    Product Dimensions
    Motor Weight
    2.8kg
    Battery and Controller Weight
    1.9kg/2.34kg/2.36kg/2.84kg/3.4kg/6.16kg/6.66kg
    Package
    10kg, 70*70*20cm

Lvbu Rear Wheel Torque Sensor Ebike Kit

The KF series ebike kit can be quickly installed on your bike. It can be installed by anyone in a few minutes. There are two simple steps to turn your normal bike into a smart ebike:

  • Smart ebike kit

    built in torque sensor motor

  • 16-29 inch

    Multiple wheel size

  • Bluetooth 5.0

    A new era of interactive experience

  • Speed ≤ 32km/h

    high speed permanent magnet motor

  • Micro Power

    Provides you the best cycling experience

  • 2 drive ways

    Throttle / Pedal assist

Just 2 steps to convert a normal bike into a smart ebike

You need to use the sprockets from the original bike,and only one connection cable is required to connect the battery and the motor.

INSTALLATION REQUIREMENTS

Installation Effect Display with Different Battery Type

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

Optional 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

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

  • Over-discharge protection
  • Over current protection
  • Temperature protection
  • Over charge protection
  • Short circuit protection
  • Battery balance

MRT Series built-in torque sensor hub motor

Built-in Cassete Torque sensor makes MRT motor a perfect alternative solution of middle drive motorSmall size, light weight, pedaling force real-time measurement smooth start,consistent acceleration

Rated power:  250W
Voltage:  36
Structure:  Gear Drive
Efficiency:  >80%
Max torque:  40 N.m

Micro power system

10 years of research and development has gone into creating a versatile and cost-effective product for cyclists.The micro power 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.

Anti-theft tracking, 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.

5 smart assist modes

We have spent 5 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 theBluetooth display, calculating out the power you need. lt will assist you automatically when you pedalAnd we wil keep on optimizing the system and publish it from time to time. You will be able to update the system via the APP.

Commute mode Leisure mode Manual mode Exercise mode Climbing mode

Check the real time cycling data and set the assist mode on the APP

And also you can check the speed,temperature, power, mileage, etc.

IP65 waterproof grade

IP65 waterproof grade makes you ride freely in the rain.

PACKING LIST

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

Welcome to send us your enquiry, we will contact you as soon as possible
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46 REVIEWS - Torque Sensor Ebike Kit
RW
United Kingdom , 4/22/2026
Absolutely brilliant for cruising around London.
Model: KH50T 250W 15Ah Rear Motor with Torque Sensor, KH50T 250W 15Ah Rear Motor with Torque Sensor
Size: 29”, 29“
Color: Black, Black
Ann Tait
Germany , 4/13/2026
You can say I am a fanboy of lvbu. I purchased their 1st kit and more recently the new torque kit. In both cases I have been an early adopter and being based in Australia their products take a considerable time to be manufactured and shipped. However on both occasions they have been true to their word and delivered a fabulous product and provided excellent support over that time. I wholeheartedly recommend this company and its products.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Pat Stewart
Germany , 4/8/2026
Works great, easy enough to fit if you have the tools! (crank remover tool). also worth having extra zip ties to hand.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 27.5", 27.5"
Color: Black, Black
Niek Van der Wiel
Belgium , 4/3/2026
The motor is great! Silent and smooth. It kicks in very nicely and is barely audible when it does. The product exceeded my expectations, I highly recommend it.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Steve Nelson
Germany , 3/25/2026
Owner of both the old generation BY20D and the new KF30S with torque. The KF30S with torque is smooth as butter in acceleration and somehow makes the motor quieter? It isn't as quick off the line but the experience is better, even though it wasn't bad to begin with
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 27.5", 27.5"
Color: Black, Black
Darren Barnett
Canada , 3/18/2026
With all honesty it took a long time to get the kit but in the end it was very worth it and I enjoy it a lot.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
John
Indonesia , 3/16/2026
Great Conversion Kit!!
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 20", 20"
Color: Black, Black
Clare Lawson
Malaysia , 3/10/2026
Everything installed with a few tweaks that were noted in the manual as possible problems with solutions. I’m surprised the motor is rated at 250 watts - it pulls as hard as a “750” watt motor. My biggest suggestions for improvement would be USB-C charging and weight reduction. An option for silver wheels and spokes would be cool too.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 16", 16"
Color: Black, Black
Russell Leighton
Poland , 3/3/2026
Ordered two kits with most of the accessories. They arrived a week easrlier than expected. Install was easy with both bikes done 2.5 hours from unpacking. Motors are smooth and have plenty of power. Gets us riding more.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Danielle Pratt
Canada , 2/10/2026
My item was late being delivered but it was worth the wait. I really do love it. Easy to install, very peppy and so much lighter than my old electric kit!
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 27.5", 27.5"
Color: Black, Black
Scott Bogust
United States of America , 2/6/2026
Wanted to get in better shape and move more but didn't want to invest a lot of money in a new electric bike. Not a mechanic but was mostly very easy to setup. The pedal assist makes me work but doesn't make my ride miserable. Tried riding to work today and enjoyed not needing to stand out of the saddle up the hills. Thanks from Reading, PA
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Corneel Demeulenaere
Poland , 2/5/2026
Well packed, well explained, always eager to help. Nothing to complain about.
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 700C (28“), 700C (28“)
Color: Black, Black
Mark Enderby
Sweden , 2/3/2026
What an incredible product. Adding the bike kit to my bike has rekindled my excitement for riding and makes commuting a breeze. It was a little bit of a drag waiting months on the order, but I couldn't be more pleased with it.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Kalvin Fromage
Denmark , 2/2/2026
I am very pleased with the product. It has made cycling easier and safer using the power available when in electric mode. My husband also has a kit from lvbu factory and we have both found a new enthusiasm for cycling. We are exploring the cycle trails in the New Forest at the moment. The order processing was pretty easy with straight forward instructions but we did have a few minor problems with the installation. We are not biking experts so asked for help from our local bike shop. Once the installation was completed and the bike ready to go, it was so simple to use. Great product.
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 700C (28“), 700C (28“)
Color: Black, Black
Pat
United Kingdom , 1/23/2026
LVBU were happy to replace a faulty cadence sensor even though the kit was out of the warranty period. Great Service
Model: KD30T 250W 9Ah Rear Motor with Torque Sensor, KD30T 250W 9Ah Rear Motor with Torque Sensor
Size: 27.5", 27.5"
Color: Black, Black
David Kaye
Norway , 1/22/2026
I am very impressed by the care and attention of their support staff. Faulty components were quickly diagnosed and replaced. I love the lvbu kit, fitted to a Dynamic shaft-drive bike and especially the fact that lvbu can supply a throttle control, which has greatly enhanced my ebike experience.
Model: KH50T 250W 15Ah Rear Motor with Torque Sensor, KH50T 250W 15Ah Rear Motor with Torque Sensor
Size: 26", 26"
Color: Black, Black
Nathaniel Morris
Canada , 1/13/2026
When help is required, they respond with what's needed
Model: KH50T 250W 15Ah Rear Motor with Torque Sensor, KH50T 250W 15Ah Rear Motor with Torque Sensor
Size: 29”, 29“
Color: Black, Black
Simone Galna
United Kingdom , 1/6/2026
It took a while to arrive but that was expected. Works great. But it was not easy to install. Manual and videos were helpful but not 100% clear to me. I'm not the most mechanically savvy person and I'm stubborn to call for support. I had to clip a few parts to make them fit my bike, but in the end it works great!
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Jeff OBrien
Netherlands , 12/24/2025
impressed by both the product and the service, and wouldn't heistate to recommend it to others.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Pam Walters
United States of America , 12/18/2025
Great product; love how well it works and how reliable it is. And during installation process, the LVBU team helped me sort out and identify an issue with the display. I bought an adapter to install it and it totally solved the issue -- flawless rides now. Go LVBU!
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
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