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Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike
Free shipping
Easy installation
1-year warranty
VAT included

Kirebike 72V 4000W High Power Ebike Kit for MTB and Fat Tire Bike

Free Shipping

Sale price £1,380.00
Wheel:26 135mm Dropouts 1speed
Battery:84V Fully Charged 72V 20AH lithium battery with 5A fast Charger
Quantity:
Note:
1)Cassette 8s, 9s, or 10s sprockets are not included in the package.
Free Accessories Included
Torque Arm €10,00
Free
ECMF €5,00
Free

Free shipping to the UK, US, and EU countries.

Orders shipped from China are sent via DHL Express, FedEx, TNT, or airmail. Please note: When ordering an e-bike kit, the battery is shipped separately.

DHL, FedEx, TNT, etc. - Orders typically take 5-14 business days to reach most locations and may take longer in remote areas.

80-90km/h Max Speed
40-80km Range
72V20AH 84V Fully Voltage Lithium Battery
Born for Climb Product Overview

The KirbEbike is equipped with a powerful 72V 4000W e-bike motor brushless direct drive design, all black color nice and strong wheels for disc brakes, 135mm dropouts with single speed to suit most MTB bike models, and up to 80-90km/h riding speeds.
The KirbEbike is equipped with a 72V 20Ah LG and Samsung Cells lithium battery capable of an impressive riding range of 40-80km+. This e-bike kit also comes with advanced features including 48v-72v 60a FOC Smart Controller, a twist throttle with a Key, Electric Brake Lever, 3.5 color display and so on.



Please consult a professional to make sure your conversion is fitted safely and check your local laws on e-bikes for where you live in the world, do not ride bikes on the road unless you have checked the law in your local area and country. Batteries ship separately.

PLEASE NOTE THIS KIT IS FOR OFF-ROAD USE ONLY.
PLEASE MAKE SURE YOUR BIKE FRAME IS STRONG ENOUGH FOR THE 80+KM/H SPEED.
PLEASE MUST INSTALL THE TORQUE ARM FOR THE SAFETY

4000W motor wheel
72V 20AH Lithium Battery
80-90km/h Max Speed
40-80km Mile Range
9.8kg Motor Weight
50 Minutes Convert Your Bike

Convert Any Bike into a Supercharged E-Bike! DIY 72V 4000W Hub Motor Kit

Want to take your mountain or fat tire bike to the next level? Our detailed guide makes it easy to install the Kirebike 72V 4000W hub motor kit, turning any bike into a high-powered e-bike. No need to buy a new bike—just follow our simple steps and enjoy incredible speed and performance. Perfect for off-road adventures or a faster commute, the kit delivers unmatched power with an easy installation process. Get ready for an electrifying ride!

Powerful, Longer Range, and After-sale service

The KirbEbike 72V 4000W e-bike kit is combined with a new 72v20Ah lithium battery that is powerful. The battery effectively increases the range, stability, and safety of the bike. The range is 40-80km on a single charge.
The life span of the lithium battery pack is 3 years.
84Volts Full Charged
72V 20Ah Battery Capacity
4-5 Hours Time Until Fully Charge
800 Times Cycle Life

Unmatched Power, Durability, and Performance

The kit includes a 72V 4000W motor, 60Amp controller, 72V 20AH battery, throttle, e-brake levers, and all essential tools for a quick e-bike conversion. Everything is safely packaged for easy setup and protection.
4000W Motor Power
110Nm Max Torque

TFT 3.5" NC-60 Colorful Display Meter

Provides information on speed, mileage, battery power indicator, etc.

Easy to Install

Fits Your BikeInstall Your E-bike In Just 20 Minutes

Not technical? You’re in luck - we built the KirbEbike Kit to be fitted by anyone.
Rear wheel installation tutorial
Rear Wheel Loading
Brake Sensor Installation
Brake sensor installation
Mounting the dashboard
Mounting of the booster
Wire connection accessory testing
Two ways of loading batteries
Light set installation

What's in the kit?

What's included in the individual kit?

In the individual kit, you get everything you need to DIY your bike into an e-bike.

A 72V 4000W powerful motor wheel, 48V-72V 60Amp FOC sinewave smart controller, 48V-72V TFT color display, 72V 20AH Lithium battery pack, 72V 5A Fast Charger, Twist throttle with Key Lock, e-Brake levers, sprocket, Controller and a good package with foam to protect all parts be safe.

In addition we provide free sweet service accessories, installation tools and additional parts.

What's in the kit?

What's included in the individual kit?

In the individual kit, you get everything you need to DIY your bike into an e-bike.

A 72V 4000W powerful motor wheel, 48V-72V 60Amp FOC sinewave smart controller, 48V-72V TFT color display, 72V 20AH Lithium battery pack, 72V 5A Fast Charger, Twist throttle with Key Lock, e-Brake levers, sprocket, Controller and a good package with foam to protect all parts be safe.

In addition we provide free sweet service accessories, installation tools and additional parts.

1. MTX 39 Double Wall Aluminum Alloy Strong Rim. Black Color

2. 4000w Brushless Direct Drive Rear Wheel, 9.8kgs weight.

3. Black Paint Spokes anti-rust 12G 2.6mm with copper Nipples.

4. Dropouts is 135mm for MTB Bike, 175mm dropouts for Fat Tire Bike.

5. Fit Disc Brake.

6. 80-90km/h max speed.

7. CE, ROHS certificates.

1. 84V Full Charged Voltage

2. 5A Fast Charger is included.

3. LG or Samsung Grade A cells

4. USB mobilephone Charging

5. ON/OFF Switch

6. Battery Indicator. Precent.

7. Triangle Black Plastic Case.

1. 48V-72V 60Amp FOC

2. Sinewave 18 Mosfets Controller.

3. Over Heating Protection.

4. Controller Bag to Protect the controller waterproof.

1. Color Display Design.

2. Battery Power Indicator.

3. Running Speed, Average Speed, Max Speed.

4. Single Mileage, Total Mileage.

5. PAS Levers, Brake Signal, Throttle Signal.

6. Cruise Function, 6KM/H Walk Function, and so on.

Electric Brake Lever to cut off the power when you press it.

Easy installation、More sensitive 、more stable performance.

Free Accessories Included

Allen Tool Set

Allen Tool Set
Crankset Remove Tool
Freewheel Remove Tool
Crankset Remove Tool
Wrench

Sweet Service Accessories

Brake sensor
Torque arm
ECMF

Additional Parts

Book Manal
Cable Ties
Cable's Tube

Frequently Asked Questions

Our kit is suitable for most bicycles, but please view the below details for reference.

Firstly, a 36v 250w front motor system is installed on the front fork instead of the bicycle's front wheel. And its dropouts are 100mm. So please confirm your front fork dropouts is 100mm. Please click Dropouts and view the video of the Dropouts measurement.

Secondly, please choose the wheel size, we have 20" 26" 27.5" 28" 29" 700C wheels. If you are not sure which wheel size fits your bicycle, please click the wheel size to check how to confirm your bicycle wheel size.

At the last, please choose the battery you like. Here is a short video about the installation of the downtube battery and rear rack battery. 

Please contact us at support@kirbebike.com if you have more questions.

How Far Can I Go (Battery Range)?

36V 13Ah battery has 30-40 miles of range
36V 16Ah battery has 38-45 miles of range
36V 18Ah battery has 42-50 miles of range
48V 13Ah battery has 40-50 miles of range
48V 16Ah battery has 50-60 miles of range
48V 19.2Ah battery has 60-70 miles of range
48V 21Ah battery has 65-75 miles of range

All figures are in pure electric mode, the actual mileage will be farther if there is pedal assist.

LG cells are better in product quality and stability, so the price is more expensive.

Most of our electric bike conversion kits can reach a top speed of 25-30 Km/h, but the 1000W model can reach speeds of 45-50 Km/h. These speed limits are primarily set by the laws governing bicycles. Requirements for bicycles with a top speed of more than 25 km/h may require additional permits and are subject to different traffic regulations.

We stand by the quality of our products.

· 7-day money-back guarantee on all orders. Please contact us to return items for a refund.

· Lifetime technical support. Contact support@kirbebike.com for assistance from our team of experts.

· 1-year extensive warranty on all retrofit kits. See the Warranty and Returns Policy for details.

Free Shipping to Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom, Australia and the United States.

We place great emphasis on quality control from the start of production to the end, and each kit is rigorously tested before it leaves our store.

For complete kit purchases and any purchases that include batteries, our team will build, test and ship your kit within 2-7 business days.

For smaller items, such as accessories or components, our team takes 1-5 business days to process and ship your item.

For more details, check each kit's product page for the latest updates on availability, or email us at support@kirbebike.com.

Influencing comments

Simple, affordable, high performance, and low maintenance single speed.

Top E-Bike Review Site

Impressive value for money.

Leading Tech Magazine

A blend of value and style that doesn't scrimp on features.

The Home of Technology News

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