Name: 500W and 750W MTX Rim Ebike Conversion Kits
Brand: KirbEbike
Price: 968.95 EUR
Availability: InStock
Rating: 4.63 (19 reviews)

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power output

500-750w | motor wheel

Battery Specs

15Ah/20Ah/30Ah | Lithium Battery

top speed

45MPH+ | Max Speed

ride range

35-70km | Range

motor weight

4.1kg | Motor Weight

Install Time

30 Minutes | Convert Your Bike

durability

1000+ Times | Cycle Life (Long-Lasting)

charging

6h | Fast Recharge

torque

60-80Nm | Max Torque

Voltage Peak

54.6V | Full Charged |

Smooth start, Legal riding, Easy to install, And Long service life.

500-750W brushless gear hub motor is a high torque, good for climbing, the strong double wall rim is 39mm wide, all black, black painted spokes to prevent rust, and 12G spokes are strong for the safe.

500-750W

Motor Power

60-80Nm

Max Torque

Flexible Installation Design

Compact Design. Flexible Fit. Secure Installation.

Designed with a more compact shape, this battery takes up less space and fits more bike frames with ease. It supports Top Tube / Down Tube mounting, giving you more flexibility when planning your setup. Paired with the bracket and mounting plate system, installation is simpler, more secure, and better equipped for anti-theft protection, everyday safety, and ride stability.

Flexible

Tube Mounting

Secure

Bracket Lock

Enhanced Power Core

Stable Power Starts with a Stronger Core

Built with a 60A BMS and premium LG / Samsung cells, this battery delivers stable output you can rely on for both daily riding and higher-demand use. The upgraded internal structure and patented design work together to improve consistency, durability, and overall confidence on every ride.

60A

BMS

LG / Samsung

Cells

Patented

Design

Built for Smooth, Confident Rides

High-Voltage Power. Smarter Range. Built to Last

Built with premium lithium cells, the Taishan 48V 30Ah battery delivers strong acceleration, stable voltage output, and a dependable 50–80km riding range for demanding riders. Whether you’re upgrading your e-bike or building a custom setup, this battery provides the power you can trust — ride after ride.

50-80km

Range

800+

Cycles

30Ah

Battery Capacity

IP65

Waterproof

More Power, More Miles

Smaller Size, Longer Range, And Shorter Charging Time

The KirbEbike e-bike kit is combined with a new 48V20Ah lithium battery that is smaller but more versatile. The battery effectively increases the range, stability, and safety of the bike. The range is 30-50km on a single charge and the battery will retain 80% of its capacity after 1000 charges. The life span of the lithium battery pack is 3 years.

35-70km

Mile Range

20Ah

Battery Capacity

Provides information on speed, mileage, power, temperature, etc.

LCD81F Color Display Meter

Experience smarter rides with the LCD81F Color Display Meter. Track your speed, mileage, power, and battery status at a glance, all on a vivid TFT screen. With cruise control, walk assist, and real-time signals, every ride is smoother, safer, and more enjoyable.

IP66

Waterproof Rating

Find Your Perfect Model

Best For

Commuting Kits

Daily Commute

Motor Power

500-750W

250W

Full Charged Voltage

42V / 54.6V

42V

42V / 54.6V

Wheel Position

Rear Wheel

Front Wheel

Front Wheel / Rear Wheel

Wheel Size

20” / 24” / 26” / 27.5” /28” / 29” / 700C

16”13 /8 / 20” / 24” / 26” / 27.5” /28” / 29” / 700C

20” / 24” / 26” / 27.5” /28” / 29” / 700C

Bike Compatibility

MTB / Fat Bike / Road Bike / City Bike

Road Bike

MTB / Fat Bike / Road Bike / City Bike

Top Speed

45-50km/h / 35-45km/h

15miles/h

30-35km/h

Range

35-70km / 30-40km

65-90KM

35-70km

Battery Required

48V 750W / 36V 500W

36V 7Ah+ 36V 15AhG

48V 20Ah / 36V 15Ah

Battery Included

Optional

Yes

Optional

Installation Level

Medium

Easy

Brake Compatibility

Disc Brake

V Brake

Disc Brake

Waterproof Cables

Yes

App Support

Yes

No

Best For

Commuting Kits

Daily Commute

Motor Power

500-750W

250W

Full Charged Voltage

42V / 54.6V

42V

42V / 54.6V

Wheel Position

Rear Wheel

Front Wheel

Front Wheel / Rear Wheel

Wheel Size

20” / 24” / 26” / 27.5” /28” / 29” / 700C

16”13 /8 / 20” / 24” / 26” / 27.5” /28” / 29” / 700C

20” / 24” / 26” / 27.5” /28” / 29” / 700C

Bike Compatibility

MTB / Fat Bike / Road Bike / City Bike

Road Bike

MTB / Fat Bike / Road Bike / City Bike

Top Speed

45-50km/h / 35-45km/h

15miles/h

30-35km/h

Range

35-70km / 30-40km

65-90KM

35-70km

Battery Required

48V 750W / 36V 500W

36V 7Ah+ 36V 15AhG

48V 20Ah / 36V 15Ah

Battery Included

Optional

Yes

Optional

Installation Level

Medium

Easy

Brake Compatibility

Disc Brake

V Brake

Disc Brake

Waterproof Cables

Yes

App Support

Yes

No

Trek 500w Ebike Build & Top Speed Test Ride!

KirbEbike's 500W e-bike conversion kit, in riding it doesn't deliver the super exciting riding thrill that a high-speed e-bike does. This is a 500-watt hub motor, and if you compare this to the rear wheel, you will see that it is gearless. It's smaller, lighter, not as chunky, and still fast.The 36-volt battery will be a little smaller than a 48-volt e-bike, but with double the range, you can safely take the bike out for a full day of fun. At 10 miles per hour, you'll be able to better enjoy the scenery along the ride.

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 36V 500W or 48v 750w big torque motor wheel, 36V or 48V 25Amp smart controller, LCD81F color display, V12 PAS, Thumb throttle, e-Brake levers, 1T4 waterproof quick release harness wires 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 36V 500W or 48v 750w big torque motor wheel, 36V or 48V 25Amp smart controller, LCD81F color display, V12 PAS, Thumb throttle, e-Brake levers, 1T4 waterproof quick release harness wires 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.

Motor wheel

1. MTX 39 Double Wall Aluminum Alloy Strong Rim. Black color for disc brake only.

2. 500W-750W SHENGYI brand Brushless Geared Rear Motor, 4kgs Weight.

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

4. Dropouts: 135-142mm. Two Motors: One is for a 7s threaded sprocket, and The other is for a Cassete 8s/9s/10s/11s sprocket.

5. Fit Disc Brake only.

6. 35-70km/h max speed.

7. CE, ROHS certificates.

8. Lightweight, rotary motor weight 5.1KG, card motor weight 5.3KG.

Smart controller

1. 36V/48V 25Amp 9mosfets

2. Smart Controller.

3. Quick Release Connectors.

4. Waterproof Design.

5. CE, ROHS certificates.

LCD81F color display

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.

V12 PAS

V12 PAS. A 12 magnets signal pedal assist system.

e-Brake levers

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

1T4 harness wires

The waterproof and quick-release connectors.

Thumb throttle

Easy installation、More sensitive 、more stable performance.

Controller bag

Free Accessories Included

Allen Tool Set

Crankset Remove Tool

Freewheel Remove Tool

Crankset Remove Tool

Wrench

Sweet Service Accessories

Brake sensor

Torque arm

ECMF

D12L PAS

Additional Parts

Book Manal

Cable Ties

Cable's Tube

Frequently Asked Questions

Will the kit fit my bike?

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.

Any question?

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.

How many blocks can I walk? (top speed)

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.

How long is our warranty?

We stand by the quality of our products.

• 1-Year Global Warranty on all Kirbebike conversi on kits.

• UK: Free repairs for both the e-bike system and battery. US & Netherlands: Free battery repairs for 1 year.

• Need help? Contact support@kirbebike.com for warranty support and technical assistance.

Free shipping to my country?

We ship to customers worldwide.

• Free shipping on all UK orders.

• We also ship to the US, EU, Canada, Australia, Japan, and many other countries.

• International shipping rates are calculated automatically at checkout.

How long is the shipping and delivery time?

We deliver orders quickly with trusted global carriers.

• UK: Free delivery in 3–5 business days.

• International: Most orders arrive within 5–14 business days.

• For safety, your kit and battery may be shipped separately with full tracking.

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

Nice upgrade!

I ordered a rear hub motor kit and upgraded my Specialized cross trail bike. I had a few issues after installing all the components, but the support team got me squared away quickly.

Converting kit

2nd part of order still not delivered

Kirbebike's 500W and 750W MTX Rim Ebike Conversion Kits

Really good stuff easy to put together and fun

Problem with order

Unfortunately my order had a problem. My wheel kit arrived with the standard wheel instead of the MTX wheel as advertised. I contacted the company who were very reluctant to exchange it and told me I would have to pay some of the return costs. I was offered a £50 pound refund and one year extended warranty for keeping the wheel I had. I endered up excepting this due to the expense and hassle of getting it changed.
So the buying experience was not as good as I expected,. Sorry about the negativity but you did ask. Regards Paul.

fantastic

takes some time but resuts are worth it
I found Kona tourqe arms were visually better than those supplyed as they worked with my bike frame better.
take your time and be safe riding

The best product that i bought.

Impressive kit

750watt Kit arrived in about 4 days battery came first and the kit arrived about 1.5 hours later,was well packed.kit quality is good and pretty straightforward to fit,the motor is quick and responsive and I managed a top speed of 34 mph so very impressed so far,the kit looks great on my bike:)

Easiest kit I've ever fitted

I'm used to 1000watt brushless hub motors. Thought I would give kirbyebike 500 750 kit a go. I already had a couple of 48V 17.5 Ah batteries.
The plug and play waterproof connectors were a breeze.
In conclusion I would this 750 watt brushless geared motor I s very similar to my 1000 watt brushless hub motor.
I did have a small issue, ( my fault) needed some info, I got a reply straight away. I would definitely buy another kirbyebike kit, if I do another project.

Just get this

The 500w/750w kit is a dream to instal so simple wheel fits perfectly on my GT Aggressor. I paired it with the 48volt 16ah battery and am well pleased with the outcome lots of speed got over 30mph out of the kit and battery more than enough for anyone i think :) not just speed tho this kit climbs up hills like a demon. The one thing that would be good is some sort of programming cable so i could tweak the power modes myself like the bafang mid drive kits that would be a game changer.

Kirbebike's 500W and 750W MTX Rim Ebike Conversion Kits

Off-Road Kits

Commuting Kits

FAT Tire Kits

Road Legal Kits

500W–1000W

Mid Motor Kit

EZ Rider Kit

Battery

Accessories

500W and 750W MTX Rim Ebike Conversion Kits

Find Your Perfect Model

Trek 500w Ebike Build & Top Speed Test Ride!

What's in the kit?

What's included in the individual kit?

What's in the kit?

What's included in the individual kit?

Free Accessories Included

Allen Tool Set

Sweet Service Accessories

Additional Parts

Frequently Asked Questions

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

Impressive value for money.

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

Customer Reviews

Off-Road Kits

Commuting Kits

FAT Tire Kits

Road Legal Kits

500W–1000W

Mid Motor Kit

EZ Rider Kit

Battery

Accessories

500W and 750W MTX Rim Ebike Conversion Kits

Find Your Perfect Model

Trek 500w Ebike Build & Top Speed Test Ride!

48V 20Ah Battery

36V 15Ah Battery

Taishan 48V 30Ah Battery

What's in the kit?

What's included in the individual kit?

What's in the kit?

What's included in the individual kit?

Free Accessories Included

Allen Tool Set

Sweet Service Accessories

Additional Parts

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

Impressive value for money.

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

Customer Reviews