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Free UK Delivery
Easy installation
1-year warranty
Motor kit only from £357.85with battery from £842.55. Pick wheel size and battery below.
It’s the kit that built KirbEbike’s reputation: enough power to flatten hills and pull away from lights fully loaded, wrapped in the weatherproofing British riders actually need. The MTX rim arrives as a complete made-to-order motor wheel in your exact size — no spoke lacing, no wheel building — so installation is a 20–30 minute job with the free toolset.
Every electrical component is sealed for real weather: the battery is IP65-rated and lockable, the controller is potted in thermal resin rather than hidden in a rain bag, and the loom uses waterproof quick-release connectors that cannot be wired wrong. It is the kit we recommend first to nine riders out of ten — and with 126+ verified reviews at ★4.8, the riders seem to agree.
Note: Please note that this kit is for off-road use only.
🇬🇧 Fast & FREE UK Delivery
We offer 100% FREE Shipping on all orders within the UK! Your e-bike kit will arrive quickly at your door within 3-5 business days.
🌍 Premium Global Shipping
We also proudly ship to the US, EU, Canada, Australia, Japan, and worldwide. International orders are dispatched via trusted premium carriers (DHL, FedEx, TNT) to ensure reliable service. Shipping rates are transparently calculated at checkout, and most global orders arrive within 5-14 business days (please allow slight delays for remote areas).
📦 Secure Battery Shipping Notice
For maximum safety and faster customs clearance, your e-bike kit and battery will be shipped in two separate, securely tracked packages. Both parcels are fully monitored to ensure they reach you safely.
We stand behind the quality of our kits. Wherever you ride, we’ve got you covered with our 1-Year Global Warranty.
🇬🇧 UK Riders (Full Coverage): Enjoy complete peace of mind with 1-year FREE repair service covering both your entire e-bike system and the battery.
🇺🇸 🇳🇱 US & Netherlands: Includes 1-year FREE repair service specifically dedicated to your e-bike battery.
🌍 Global Support: All international orders are fully backed by our standard 1-year global warranty against manufacturing defects.
If you encounter any issues with your kit or battery, our technical team is here to help! Please contact us directly at support@kirbebike.com.
The facts that decide whether this kit works on your bike, in one place. Measure first, then order.
In the individual kit, you get everything you need to DIY your bike into an e-bike.
A 2000w powerful motor wheel, 48V 35Amp FOC sinewave smart controller, LCDS6 TFT 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.
In the individual kit, you get everything you need to DIY your bike into an e-bike.
A 2000w powerful motor wheel, 48V 35Amp FOC sinewave smart controller, LCDS6 TFT 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.
1. MTX 39 Double Wall Aluminum Alloy Strong Rim. Black Color
2. 2000W brushless direct-drive rear hub motor, 5.6–6.8 kg depending on version.
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 Cassete 8s/9s/10s sprocket.
5. Fit Disc Brake.
6. Up to 60 km/h (37 mph) on private land.
7. CE, ROHS certificates.
1. 48V 35Amp FOC sinewave 12mosfets Controller. It works for 36v, 48v and 52v lithium batteries.
2. FOC Sinewave Smart Controller
3. CE, ROHS certificates.
4. Best Cooling and Waterproof.
5. Easy to Install with tape tie.
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.
The waterproof and quick-release connectors.
It is the best place to get a kit, safe and reliable, good customer service and high quality.
Super easy to install.
I ordered a 26 inch 7 speed freewheel version with included cog. Fits the carera Vengence perfectly. Just no 8 speed needed anyway A dream build I’ve been meaning to do for years
Goes 62kmh on the road, buying this was the best decision i could have made.
Honestly where do I start the kit itself is the best quality and has the clearest instruction manual on how to install and any help I did need was answered by Jason in a timely professional manner absolutely pleased with my kit and the 40mph I get all day long
Excellent product easy to fit done 200nmile in last week coupleof small problems but looking to upgrade battery to 72v or 60 v and controller gett more acceleration&torque slight problem battery voltage sag but emailed regarding my problems having need surron throttle and display settings list of what's what they do as no instructions is italways normal yo have red indicatorlight on a full charge
It’s a good bit of kit but the battery isn’t very secure in its holder infact my sons one came flying out while he was riding his bike so now the battery is all scuffed
All went together really well and the quality of everything seems really good. Should you need any support the guys are really quick to respond. I only had to contact them about getting the dimensions of the controller prior to my kit arriving which Jason provided in a detailed drawing.
Its damn Fast but also very smooth and quiet.
first of all the kit was been very reliable for the 3 months i've had it, and the customer service it's the best i have ever seen, they sent me free parts and always listen to me and always go over the top, special thanks to jason he is the best. the range it's good but i recommend the 30ah battery for sure... top speed for me was 40mph but it will do more. torque is great as well, you can wheelie it too but it's a little harder, definitely the best chinese kit by fair.
Very fast and easy to fit. Had a few small problems but Jason sorted me out straight away Thanks to Jason. I recommend.
Very pleased with my KirbEbike. I followed Andy kirbe YouTube video to install and it went very well. 5000 miles later and it's still going strong. Great after sales support too which is paramount to me.
The kit comes with everything you need to make it easy to convert any bike to electric. It was well packaged and everything works! My bike is so much faster now! It puts a smile on my face every time I take it out.
Brand New Scott Hardtail finished in Sunflower Yellow complete with 2000w 52v 20ah KirbEbike kit. Just finished building and out enjoying this awesome thing. I need to move the controller once I’ve got a suitable mount and a little bit of better cable management but so far very happy with the kit and an awesome bike
Did bags of research on e conversion kits and the Kirby kit by far came across as the kit for me. Online install videos were superb by dude stuff and a breeze to follow. Company were first class on communication on ordering and received the kit and battery all within a week . Fitted in a couple of hours and really impressed with performance. Couldn’t recommend Kirby kits more.
Wow! Amazing service, thankyou to Jason for the swift email response. This kit fitted easy, everything was perfect. Also fast😍
Once I went on YouTube and watched how to set up the e bike settings as zero manual about settings . It is quick on acceleration tested on a 25 degree hill n reached 21.8 mph in 150 yards . Top speed of about 35 mph . Easy install although it took about 2 hrs 45 without using or needing the instructions as not our first bike build , the bike mechanic Johnathan Freshney did an amazing build thank you
Great kit. The motor goes smoothly and quite. Powerful. Overall the kit is fantastic. The controller is fully waterproof as the motor and dasboard.
Ive got only one issue with the controller. Could be nice if the controller had light wire, speed limiter wire or work even when the Hall sensors are damaged, its calked sensorless controller. I saw other YF similar controllers has those options available. Maybe im not lucky, because my controller doesn't have this. Other than that, I would recommend that kit to everyone.
Wow where to start
This is an amazing kit so easy to fit and as the title says game changer
Ticked all the boxes value quality and performance
Fast shipping and easy install I am very happy with the kit I would definitely recommend buying the 2000w kit it's amazing!
Really happy and impressed with the kit, very well put together product, as long as you got half a brain it's easy enough to install, performance is as expected, definitely recommend
Top quality kit very impressed with performance and torque
Highly recommended 👌
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
Best For
Motor Power
Full Charged Voltage
Wheel Position
Wheel Size
Bike Compatibility
Top Speed
Range
Battery Required
Battery Included
Installation Level
Brake Compatibility
Waterproof Cables
App Support
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
52V 2000W MTX Rim Ebike Conversion Kit
72V 4000W Extreme Performance Ebike Motor Kit for MTB and Fat Tire Bike 55MPH+
60V 2500W-3000W MTX Rim Ebike Conversion Kit 45MPH+
52V 2600W MTX Rim Ebike Kit Waterproof Design.
No. In Great Britain a converted bike is only road legal (an EAPC) when the motor is rated at 250W continuous and assistance stops at 15.5 mph. A 2000W motor is above that whatever the controller is set to, so this kit is for private land with the landowner’s permission, or for roads only with motor-vehicle registration, insurance and a licence. The Ride Power app does let you cap speed and current for gentle riding, but a software limit does not make the bike road legal. If you need a kit for public roads, choose one of our 250W road-legal kits. Full details: UK legal conversion kit guide.
About 35–70 km on the 20Ah battery, 40–70 km on the 25Ah, 50–80 km on the 48V 30Ah and 55–85 km on the 52V 30Ah HS-II. Ride faster or use the throttle more and you get the low end; pedal steadily with assist and you get the high end. These are riding figures, not lab numbers.
This kit includes a 52V 25Ah/30Ah lithium battery, powered by LG Grade A cells for maximum reliability and performance. Fully charged to 58.8V, it offers substantial power and durability. It’s designed with IP66 waterproofing, protecting it from dust and water, making it ideal for various riding conditions.
It is a rear wheel kit for 26", 27.5", 29" and 700C wheels with a 135–142 mm rear dropout, on a steel or aluminium frame, with disc or rim brakes. Pick the motor to match your gears: 7-speed threaded freewheel, or an 8–11-speed cassette body (cassette sprockets not included). Your motor wheel is built to order in your exact size: check the tyre sidewall for the size and measure the dropout with our wheel and dropout guide. Fit the included torque arm.
Absolutely. This kit is optimized for both on-road and off-road use, with durable components to withstand rough terrains. The 60Nm torque output provides strong hill-climbing power, while the brushless direct drive motor ensures smooth and efficient operation over rocky trails and steep inclines. For safety, we recommend ensuring your bike frame is sturdy and installing the included torque arm for extra stability.
Everything: made-to-order motor wheel, potted controller, colour display, battery and charger, pedal/brake sensors, and the complete installation toolset — free.
The kit is designed with user-friendly installation in mind, suitable for both beginners and experienced riders. The 1T4 waterproof main cable harness simplifies the setup process, and detailed step-by-step instructions are provided. Most users can complete the conversion in around 30 minutes using the included tools, making it easy to transform your bike quickly.
Yes — three ways: IP65-rated battery, resin-potted controller (not a rain bag), and sealed quick-release connectors throughout the loom. It is designed for British winters.
The battery is built for long-term reliability, with a lifespan of up to 800 charge cycles. Under typical use, this translates to around 3 years of performance before any noticeable capacity reduction. Smart power management features also help extend battery life by regulating output based on usage and conditions.
A 1-year warranty with service centres in the UK, US, and the Netherlands, so repairs never ship overseas. Real humans answer at support@kirbebike.com.
20–30 minutes with the free toolset: swap the rear wheel, mount the battery, click the waterproof connectors together. The wheel arrives fully built, so there is no spoke work.
