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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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18 REVIEWS - Torque Sensor Ebike Kit
Dennis
Germany , 4/15/2025
I had a BionX electric bike that worked very well. Sophisticated electronics, and very smooth progressive pressure sensitive support from the motor at the back. I sold it because I was fitter last year, and needed space too. My health is no so good this year, so I looked for a simpler (and way cheaper)alternative to fit my hybrid/road bike with a motor at the front, to make it easier to switch the original wheel back if I want to not use the motor. I checked the width of the fork, and that was OK before I ordered the wheel, it was delivered in around two months but worth waiting, the kit works well, the motor does help to top the hills in my area.
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 26", 26"
Color: Black, Black
Ulf Bieber
United States of America , 4/2/2025
i choose the KF30S with the bottle battery finally. i frequently commute 25 miles to work in pennsylvania (we have many hills). This product does a great job and making this daunting commute on a bike doable. you do your body a favor as well as the earth by driving your car less.
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
Harald Giese
Germany , 3/31/2025
The product is great, I like that the hub is made for the front wheel for easy installation. The price tag I feel is a little steep for just a 250 watt motor and basic battery...should be about $50 less to make it a good value. The throttle button should be slight larger for a better tactile feel to it. The staff was friendly and knowledgeable about the product. With my knee and hip issues, this kit is a life-saver and I now have revived interest in bicycling once again!
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
ZOOP
Norway , 3/29/2025
Bought the torque sensor electric conversion-great product and service- just too pricey
Model: KD30T 250W 9Ah Rear Motor with Torque Sensor, KD30T 250W 9Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Greg M
Indonesia , 3/14/2025
Great! This is my second purchase. I am very happy with it.
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 26", 26"
Color: Black, Black
Renaud Walck
Germany , 2/27/2025
Very satisfied, a good team that listens and is able to provide the necessary information. I recommend
Model: KD40T 250W 12Ah Rear Motor with Torque Sensor, KD40T 250W 12Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Marcial Páez
Poland , 2/19/2025
Good product, decent service. It allows me to get the exercise I need without fear of getting overly fatigued, that's exactly what am looking for.
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
Derrick taylor
Austria , 2/10/2025
When I arrive to a steep hill, the conversion motor saves the day by making my climb very comfortable. On flat roads, this kit make me pass bikes that are much lighter than my bike.
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
Aldo Van der Velde
Belgium , 2/8/2025
I have to admit I was skeptical of the product but after 8 months of using it I'm happy I purchased it. it does help on the hills in my area. I have a 2 year old boy who sits in front of me on a Weeride and we love biking together and the conversion kit helps me get us up the hills. All and all I'm happy with it and recommend it to other folks who enjoy biking like I do.
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
Wilkinson
Uganda , 1/26/2025
The motor fits our needs perfectly. Our contacts with ROA has been great.
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 16", 16"
Color: Black, Black
Coen Mertens
Spain , 1/26/2025
I am happy with the kit. it gives me good assistance going up hills. I bought this so I can go to work and not be drenched in sweat in the morning like I usually do when riding my road bike. This would save me time by skipping the showers at work. my work is 11 miles one way. If I don't push too hard on the pedals I get to work not sweaty/smelly. With this kit I am always on the highest gear combination. I am happy with the electric assist - it helps on the hills, but it also needs you to still work by helping the motor with pedaling so you still get your exercise. This is not for the lazy rider who depends 100% on the motor to do all the work. If you don't help pedal your battery will not last as long. for my commute i have no problems with the battery running out of power.
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
Pino Amadei
Germany , 1/24/2025
I didn't use the motor a lot in Palm Springs but when I got away from the park 6, 7, or more miles I knew I could turn around if I got tired I could get back. I showed a lot of people and handed out some information about our motor. When I use the motor the most was in Portland and Vancouver, when I was visiting family, some of those hills I definitely needed to have a little bit of extra boost great product, love it don't stop producing....
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
Vincent Gorman
Austria , 1/24/2025
I’m impressed with the ease of installation, quality of the product and battery life. I bought it for a 10mile commute on my road bike and have even gotten 20miles out of it (when also pedaling part of the time)
Model: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 26", 26"
Color: Black, Black
Chuck
Canada , 1/22/2025
Great product and working to open the horizon up again for the 60 +. 90km bottle battery is awesome---- almost too much speed sometimes. DOn't get pulled over speedin!
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
Bj?rn Gro?
Belgium , 1/20/2025
It's great! No more excuses. Predictable commute time vs car. I had a couple weeks last year where I was trying to beat my time every day. Wound up hurting a knee which kept me off the bike for about a week. Proper bike, pedaling style, and attitude adjustments helped. Adding the bike kit motor removed all but very bad weather as an excuse to take the car.
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 16", 16"
Color: Black, Black
Jane
United States of America , 1/17/2025
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: KN20T 250W 6Ah Rear Motor with Torque Sensor, KN20T
Size: 27.5", 27.5"
Color: Black, Black
Cornel
Indonesia , 1/17/2025
It was easy to install. (But I wish there was a presta valve option.) The 250w motor is strong enough for my purposes, to give that boost when you hit that nasty climb or your legs are burning. Anyway it's a pleasant experience.
Model: KD40T 250W 12Ah Rear Motor with Torque Sensor, KD40T 250W 12Ah Rear Motor with Torque Sensor
Size: 700C (28“), 700C (28“)
Color: Black, Black
Fred Weyher
Italy , 1/17/2025
I wanted to keep up with my friend who is 20% faster than me. This does it!
Model: KF30T 250W 9Ah Rear Motor with Torque Sensor, KF30T 250W 9Ah Rear Motor with Torque Sensor
Size: 26", 26"
Color: Black, Black
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