Electric bike conversion kits 2023 – Give any bike a boost
Why pay for a brand new e-bike when electric bike conversion kits can easily give a boost to the bike you already have?
E-bikes have enabled people who need or want some pedal assistance to broaden the range and scope of their riding while making it easier than ever to choose sustainable and greener transport methods.
Whatever your reason for wanting pedal assistance — whether it makes cycling more accessible to you and your family, or you think you’ll have more fun with that boost. the e-bike market is vast and often requires a large upfront cost. So if you’re struggling to find an e-bike that suits you, and already have a bike at home, then you might consider an electric bike conversion kit instead.
Whichever option you go for, there’s no denying that the best electric bikes make it easier for riders to explore and experience different terrains and riding environments. Plus they offer a cheaper and greener form of transport to get you from A to B at a higher pace for less effort than a conventional bike, which is especially beneficial for those who are commuting or using them for work. The best electric bikes for commuting can make for a speedier and altogether less sweaty cycle to work, not to mention the money saved when compared to soaring fuel or rail fare prices.
But what if you’re not sure about which option to go for? If you’re weighing up an e-bike vs an e-bike conversion kit, consider whether you already have a bike that you love riding. Converting it means you can continue enjoying the same ride quality while introducing you to a new world of electrically-assisted fun.
To make all these decisions easier for you, we’ve outlined the key things to consider when fitting an electric conversion kit to your own bike, including the various motor and battery options available. We’ve tested as many as possible in real-world riding conditions, assessing how easy they are to fit, and what kind of electric assistance they provide.
So here are our findings, and our roundup of the best electric bike conversion kits you can buy right now.
Best electric bike conversion kits available now
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Reasons to avoid
A thorough purchase process ensures the product is easy to install, but it’s complicated so can take time
The first on our list is one we reviewed very recently and which really impressed us. The Cytronex electric bike conversion kit is extremely well thought-out, with great specs and top-notch engineering. You only need Allen keys to install it, it comes with an accompanying app to offer up basic diagnostics, and once it’s set up it’s a breeze to operate.
When purchasing, you’ll go through a thorough process, which can feel a bit over-complicated, but in doing so it means the actual conversion is a straightforward one. We tested out the Cytronex on a Brompton T-Line and found it delivered smooth and intuitive power. Plus, our hands-on time with it leads us to believe it’s strong and durable enough to use for commuting.
While it’s pricier than some of the options listed below, one thing to consider is that it comes from a UK-based company that offers comprehensive customer support. You can pay less for a Bafang kit on Amazon, but buying direct from a company that can support you if anything goes wrong, makes it a smarter choice in our view.
For an in-depth look, check out our Cytronex review.
Reasons to avoid
One of the easiest ways to convert a bike to electric is to swap out the front wheel for one with a front hub motor. This is the approach that Swytch takes, but there’s more to a good system than just a motor and battery. From our time testing and reviewing it, it’s clear to us that the team behind Swytch have considered the whole system in its design.
The battery mounts to the handlebars and we found that a really useful detail. It is easy to disconnect and take it away for storage, so it doesn’t get stolen when you are out and about, or to lighten the bike when, for example, it needs to be carried up a flight of stairs.
The 2022 Swytch system, which we tested, makes use of a neat handlebar-mounted LCD display instead of the buttons on the battery it had before. There’s also a cadence sensor that attaches to your bike. It’s a well-thought-out system that looks and feels great.
To read all about how it works, and find out why we gave it four stars, take a look at our Swytch review.
Reasons to avoid
If you’re on a tighter budget than the Cytronex or Swytch allow for, then as we mentioned above, getting a kit from Chinese manufacturer Bafang may be a better option. Plus, if you like the idea of an electric bike conversion kit but just don’t want to have to deal with the added complexity of a mid-drive setup, then the Bafang Front Hub kit makes things much easier.
Like the mid-drive system listed below, the Bafang Front Hub Motor kit covers everything required and gives tons of spec choices. We started by choosing our wheel size and display preference, then added the battery size and shape we wanted.
We did find it more of a time investment, given the installation process was more complex than the Cytronex, Swytch and Rubbee, but this did allow us to achieve a powerful, high-quality set-up.
To find out more about how we got on, read our Bafang Front Hub Motor review.
Reasons to avoid
There are a number of simple install options on the list but the Rubbee X takes it a step further. We were really impressed with how easy it was to attach the mount to the bike’s seat post and then click the unit into the mount. There’s no need to change the wheel like the Swytch system. Here the motor sits on top of the rear tyre and a roller pushes it around from above. There’s also a wireless cadence sensor, as this is a cadence-based system that adjusts based on pedalling cadence, rather than torque.
There is a slick-looking 250-watt motor with a single battery in the base kit. If the 10-mile range of the base unit feels a little constricting, another battery can be added to double the range. Rubbee also has a handy phone app that can be used to change assistance modes.
We’ve spent some time testing it out, so why not check out our Rubbee X e-bike conversion kit review for more details.
Reasons to avoid
Bafang is one of the largest and most well-known electric bike motor companies in the world. It’s been around since 2003, and in 2014 Bafang established a US arm to better support the US market. There are many well-known electric bike companies sourcing its components, so if you want to get in the game and source your own electric bike components, you won’t go far wrong with Bafang.
This particular option covers everything you need for a mid-drive motor conversion kit. As long as the bike you are starting with has a bottom bracket sized between 68 and 73mm, this kit will work. From there you can choose the front chainring size, the battery size, and what display works for you.
If you’re not sure whether or not a mid-drive motor conversion is what you need (or what other drive options there are), head down to our FAQs at the bottom of this article for an explanation of all the possibilities you can choose from.
Reasons to avoid
The most natural-feeling electric bike conversion kits are going to be those with a mid-mounted motor. If that works for you and you also like the idea of doing some pedalling, then the very best is a mid-mounted motor paired with a torque sensor.
Instead of the system knowing you are pedalling and adding power, such as the Rubbee X cadence-based system above, a torque-based system adds a percentage of power. The Max torque available on this TongSheng system is 80Nm but depending on your chosen assist level, that 80Nm will add between 36 and 300 per cent to your pedalling power.
To keep it simple, think about it as an amplifier. If you pedal harder you go faster, just like a normal bike, but now your muscles have extra support, so you can go further with less effort.
Reasons to avoid
If you like the idea of a mid-drive system and you want it to have torque-sensing pedal assist then you’ve got a few choices. The challenge with a system like that is complexity. For some people, it’s no big deal to take apart a bottom bracket, but for others, it’s a slightly more intimidating prospect.
The Pendix system does the same thing as other kits but there is a dealer network that handles sales, support, and installation. This comes with an extra cost attached, but the benefit is that you can feel comfortable that the system is correctly installed and ready to ride.
Types of e-bike conversion kits
Friction drive conversion
A friction drive e-bike conversion means there is a roller that pushes against the wheels tyre. So when the roller turns, the wheel turns. It’s not the most efficient strategy, but it’s simple and it works. There is very little involved with regard to making it work but, at the end of the day, it doesn’t work as well as other systems out there. The Rubbee X is an example of a friction drive conversion kit system.
The best electric bikes tend to be mid-drive because this delivers the most natural ride feel, and the same is true of conversion kits. The weight sits low in the frame and the power gets applied to the crank for a more natural power delivery sensation. The only downside is pricing and packaging, plus it can be complex to set up yourself. Different standards make it challenging to figure out exactly what you need, as well. The Bafang Mid Drive Motor Kit is an example of this.
Electric bike wheel conversion
Swapping either a front or rear wheel for one with a hub-mounted motor is a good balance. The conversion process is very simple and, depending on how the battery mounts, the weight distribution can be quite good. Powering the wheel does change the way the power delivery feels, and making the front wheel heavy can affect the handling of the bike. If mid-drive seems overwhelming, this is an excellent option. Cytronex and Swytch are examples of this.
How to choose the best electric bike conversion kit for you
If you’re interested in fitting an electric bike conversion kit to one of your own bikes, you should consider your own personal requirements first and do plenty of research. You’re in the right place, as this guide will help you with a lot of that.
Before anything, familiarise yourself with the laws regarding e-bikes in your region. Then you may want to choose a conversion kit based on your range and journey needs. If you live in a hilly city, for example, you may want something with a little more top-end power. Lastly, check whether or not the system is compatible with the bike you plan to fit it onto. If you don’t feel comfortable doing this yourself, think about getting a quote for installation from a reputable bike shop.
Do all electric bike conversion kits come with a battery?
The short answer is ‘not always’. You need a battery, of course, so when browsing online, make sure the kit you select has one included. Since not all kits include a battery, you might find yourself browsing through options and landing on something at an unbelievable price. If that’s the case, double check it’s got the battery included. If not, then it is possible to source the battery yourself, but be sure about what you are getting.
How fast do electric bikes go?
This is hard to answer specifically as electric bikes are, on the whole, designed to assist pedalling rather than replace it, and it is the same with electric bike conversion kits. The measurement of the power of the motors is in wattage and, in effect, the higher the wattage of the motor, the faster speeds it will be capable of achieving.
However, the speed is often limited as a result of country-specific regulations. In the UK, the assistance an e-bike can legally provide is up to 25kmph (15.5mph) and, after that point, the bike can go faster but without any assistance from the motor. Anything faster would not meet the UK’s electrically assisted pedal cycles (EAPC) criteria, would be classed as a moped or motorcycle, and need to be licensed and taxed appropriately. The laws are different depending on the country, with the United States, for example, allowing more powerful motors – although individual states have their own legal frameworks.
Which bike is best for electric conversion?
You should consider the condition and componentry of your old bike. With an electric motor dramatically increasing the torque, using a low-quality or worn drivetrain will result in poor performance, with shifting being affected and the chain skipping or even snapping. Another important consideration is the brakes, adding the extra weight of an electric bike conversion kit and increasing potential speeds will put more stress on the brakes as they try to curtail momentum. We recommend choosing to convert a bike that has disc brakes as they will provide far better braking performance.
I haven’t heard of a lot of these brands, are they safe to use?
In the world of electric bikes, there are a lot of brands you may not have ever heard of. There’s been a boom going on for a while, so new brands are popping up all the time. Not only that but Europe, and especially the US, are playing catch up to the trend of electric bikes. You will probably stumble across a lot of unfamiliar brand names.
Consumers have a tendency to look away when they encounter a new brand. It’s not a bad strategy most of the time but in the electric bike world, including conversion kits, you’ve got to be more open than that. If you aren’t open to names you’ve never heard of you will find the options limited. A lot of the names you may come across are unfamiliar to you but have a solid history behind them.
That doesn’t mean you should go forward blindly. Do your research and be careful with your money, like always. The only thing that might be different is the need for being open to new companies. At the very least be willing to look a little deeper, read reviews, and do some research. The brand you’ve never heard of might actually be a well-established brand from a different part of the world.
Is converting my bike to an electric bike worth it?
There are plenty of reasons to install an electric bike conversion kit to your current bike, but the question of whether it’s worth doing is going to depend on your circumstances.
For many kits, once the installation has been completed, it will be an arduous task to remove it again, so one of the questions you’ll need to ask yourself is whether or not you want to retain the ability to use the bike as a ‘normal’ bike. If you expect to be flitting between the two (powered and non-powered) then a kit that can simply be folded out of the way – like the Rubbee X – might be perfect, but you might instead prefer to simply buy a second bike for the convenience.
The second question is to assess the state of your current bike. If you don’t yet have one, then the cost of buying a bike, buying an electric bike conversion kit and then fitting it, is probably not going to be worth the time, effort, or money involved. However, if you have a bike that is in reasonable repair, then the value for money – and effort – will be greater.
Beyond the financial and practical element, the question of ‘is it worth it’ will also depend on the amount of use you get out of it. E-bikes can be incredibly motivating and enjoyable and if converting your standard bike to electric helps you to ditch the car on a regular basis, then the answer becomes clear.
If you want a monetary answer to this question, then there are ways to work out whether the investment is worth it. Take a moment to think about your current car usage and work out the cost per day/mile, including fuel, parking and running costs. Try to work out how many journeys, days or miles you will use the bike for after it is converted. Once you know this, you should be able to work out the reduction in car running costs per mile/day and, with that, you should be able to work out how many miles/days it will take for the electric bike conversion kit to pay for itself.
Should I just buy an electric bike instead?
Remember to consider all your options. You have a bike in the shed you haven’t touched for many years and it seems like a perfect candidate for conversion to an electric bike. It might be, but it’s also just as possible that it’s a better candidate for a sale. Sometimes it’s better to take the money from that sale and put it towards an electric bike someone else built.
As with anything, consideration for the end-use during design and build can have advantages. A quality electric bike conversion kit might end up being very close to the price of a complete electric bike. If a company starts with a clean slate and designs an electric bike, it’s easier to keep costs low and integration high. Really consider why you are thinking about converting your bike and whether it makes sense compared to what’s on the market. In some cases, it will but in others, it won’t.
Are electric bike conversion kits legal?
The kits themselves are entirely legal, and fitting them to your bike is equally so. However, the question of legality arises in relation to where you then plan to use your newly powered electric bike. The answer will vary hugely, depending on where in the world you’re based, and which kit you choose.
For example, in the US, there are different classes of e-bikes that vary by their power, speed limitations and whether or not they have a throttle, and each class is subject to different rules. Things are a little more simple elsewhere, with the UK stating that anything with a speed limiter of over 25km/h is classified as a moped, while anything up to 25km/h (15.5mph) is classed as a bicycle.
Before you complete any purchase, make sure you have an understanding of the local laws that govern electric bikes, which is where our guide to e-bike classes comes in handy.
How do you install an e-bike conversion kit?
Sadly, there is no single and simple answer to this question. Each electric bike conversion kit works in a different way and therefore fits onto your bike in a different way too.
The most simple options are the friction-drive kits, such as the Rubbee X, which place a roller onto your rear tyre. In the example of the Rubbee, you simply need to mount the device onto your seat post, with the roller placed against the tyre. However, more complex systems require the removal of drivetrain components and wheels, and the installation of wiring. These are far from impossible, but they may require some tools and a bit of patience.
How much does an electric bike conversion kit cost?
will depend very much on the conversion kit in question. Some are available for as little as £250 (350), while the more high-spec and integrated kits can fetch as much as £750 (900).
Will a bike shop fit my electric bike conversion kit?
It’s understandable that you might not want to take on the arduous task of fitting your electric bike conversion kit yourself. You might not have the tools, the know-how, the confidence, or simply the time to invest. Luckily, almost all bike shops will be happy to fit it for you.
Some systems, such as the Pendix kit listed above, are only sold via physical stores and the fitting is sold as part of the overall package. However, with kits bought online such as the Bafang kit, the shop will charge you for the time it takes, which will add to the cost of the overall conversion. In our opinion, knowing that it’s been done correctly and safely is worth spending extra.
Some bike shops or workshops also may refuse to install a conversion kit to a bike they consider unfit for purpose or potentially unsafe. If you plan to have your local shop fit a kit it may be worth consulting with them on the job first to make sure they are happy to do it for you.
Individuals carrying out the instructions in this guide do so at their own risk and must exercise their independent judgement. There is a risk to safety if the operation described in the instructions is not carried out with the appropriate equipment, skill and diligence and therefore you may wish to consult a bike mechanic. Future Publishing Limited provides the information for this project in good faith and makes no representations as to its completeness or accuracy. To the fullest extent permitted by law, neither Future Publishing Limited, its suppliers or any of their employees, agents or subcontractors shall have any liability in connection with the use of this information, provided that nothing shall exclude or limit the liability of any party for personal injury or death caused by negligence or for anything else which cannot be excluded or limited by law.
Electric tricycle conversion kit
Fantastic electric tricycle kit for adults with 250W 36V front engine. 20, 26 or 16 rim options. Available in various lithium battery formats and capacities. Digital display with 5 levels of pedal assistance.
Electric tricycle kit 250W
Tricycles are becoming a very popular mobility format due to their great stability and ease of use. In addition, the vast majority of tricycles have a rear basket that makes them a highly recommended vehicle for transporting things or running errands. However, there are few electric tricycles on the market which makes them expensive and with few models to choose from.
That is why more and more users are choosing to install an electric motor kit on their tricycle in order to save a large amount of money on the price of buying a tricycle with a new motor. The kits are simple to assemble and include everything you need to turn any model into a brand new battery-powered tricycle.
Brushless for front wheel. placed on the fork. with a power of 250W. No advanced tools required. Waterproof.
Manufactured with 36V lithium-ion cells with different capacities (Ah) according to the user’s needs. In order to better adapt to the different types of frames, the user can choose between a bottle, grill or triangle type battery.
Manufactured in chromed aluminium with 20 or 26 measures, the most common in this type of cycles. For other sizes, please contact us.
LCD screen that contains the necessary information for the optimal control of the tricycle. It works like a computer that combines several kit management options:
- Attendance level. There are 5 levels.
- Speed in km/h
- Total distance travelled
- Partial distance travelled
- Battery charge level
In addition to the above, the kit to electrify your bike includes:
Maximum speed. In compliance with the applicable European regulations for electric bicycles with pedal assistance, our kits are limited to a maximum speed of 25 km/h. Breakdowns resulting from the user’s modification of the maximum speed parameter will not be covered by the kit’s warranties, therefore, in order to ensure safe use, we discourage manipulation of the kit’s factory values.
Weight: 5 kg
Warranty: 2 years
Estimated life of lithium ion battery: 3-4 years
NOTE: The range (km) and maximum speed (km/h) data in this product are estimates because they depend on at least three factors:
For longer battery life and autonomy, a moderate driving speed is recommended.
Electric trike conversion kit
Bosch Terratrike Boost Kit
Turn your TerraTrike into an E-Trike with our Boost Kit. Powered with Bosch’s ActiveLine Plus Mid Drive Motor, PowerPack 400WH Lithium Ion battery and Purion console, you’ll enjoy the added assist an e-trike can provide.
- The Boost Kit Includes:
- Bosch ActiveLine Plus Mid Drive Motor
- Bosch PowerPack 400Wh Battery
- Purion Console
- Crank Arms (No Pedals)
The Boost Kit. Bosch is compatible with the following TerraTrike models: Maverick, Rambler, Rambler All Terrain, Gran Tourismo, and Traveler (the Traveler requires additional hardware for mounting).
No option for 26 wheel (all models).
THIS KIT CAN ONLY BE INSTALLED BY A CERTIFIED Bosch DEALERS. OUR PRICE FOR INSTALLATION IS 200.00
For more information about Bosch click HERE
Bosch Catrike Kit- In Stock
Turn your Catrike into a eCAT with the Bosch Catrike Kit.
The Bosch Active Line Plus electric-assist system features four levels of power assistance: Eco. 40%, Tour. 100%, Sport. 180% and Turbo. 270%. Each level also features a maximum drive torque to ensure smooth, gentle acceleration. The Bosch Active Line Plus delivers assistance up to 20 mph and a cadence of 105.
THIS KIT CAN ONLY BE INSTALLED BY Bosch CERTIFIED DEALERS. OUR PRICE FOR INSTALLATION IS 200.00
For more information about Bosch click HERE
E-BIKE-KIT Performance Wheel Conversion
This premium electric bike conversion kit system is for those that want the best of the best in performance, efficiency, weight, stealth, and speed. The top speed is 28 mph! There is a 300 lbs. total load limit, so if you plan on more than that, look to a heavy duty system.
System Specs: Watts: Nominal 500 w/ 1000w Top Speed: Approx. 26 = 26 mph / 700c = 27 mph / 24 = 24 mph / 20 = 20 mph Range: 48v 9Ah = 9-18 miles / 48v 10Ah = 10-20 miles / 48v 14Ah = 14-28 miles / 48v 20Ah = 20-40 miles Charge Time: 3-6 hrs (from 0-100% and depending on battery size (Ah)) Load Limit: 300 lbs. max load (Based on rider weight, input and terrain contingent)
Tong Sheng TSDZ2 48v
THIS IS PRICED WITH:
-Accessorie Mount for the display
The TSDZ2 Mid Drive Motor. Torque Sensing Pedal Assist: The harder you pedal. the harder the motor works with you. 4 levels of assist provide smoothly integrated power ranging from 36-300%, allowing you to conquer virtually any hill with ease. These kits retrofit most bicycles by replacing the bottom bracket crankset assembly. to utilize the existing drivetrain gears for maximum efficiency.
The 6 Best E-Bike Conversion Kits of 2023
Heidi Wachter was a senior editor at Experience Life magazine for 10 years. She has written for publications like Experience Life, Shondaland, and betterpet.
E-bikes are easier on the environment than cars. They’re also easier to pedal than a standard person-powered two-wheeler. You get as much exercise riding an E-bike as you do a traditional bike. Thanks to improved technology and more people interested in alternative transit methods, E-bikes are also becoming more available—and more affordable.
But no electric bike is as cheap as the bike you already own. If you’re trying to reduce your carbon footprint, live in a small space, or practicing minimalism, repurposing what you already have can be a win-win-win decision. So, if you love your current ride but want to add some juice for getting uphill or for powering your cargo bike when you’re carrying a heavy load, you can, thanks to electric bike converter kits. To electrify your bike, you need a battery, sensors, controls, and a motorized wheel or a drive unit.
Here are the best options for upgrading your bike with an e-bike conversion kit.
BAFANG BBS02B 48V 500W Ebike Conversion Kit
Since 2003, Bafang has been a leader in manufacturing e-mobility components and complete e-drive systems. Its products offer outstanding performance and reliability, and the BBS02B conversion kit is no exception, making it our top overall choice.
This mid-drive motor kit is versatile and compatible with road, commuter, and mountain bicycles. All you need is a bike with a 68-73 millimeter bottom bracket and the battery of your choice. Installation is relatively easy, and the battery is included. Once the kit is installed, you’ll be ready to tackle any hill.
Although several different conversion kits are available online from Bafang, those with more than 750 watts of power will be considered motorcycles in the United States.
Price at time of publish: 466
BAFANG E-bike Front Hub Motor 48V 500W Bafang Brushless Gear 20/26/27.5/700C inch Electric Bicycle Conversion Kits
This front-wheel E-bike conversion kit is easy to set up and easy on your wallet. Electrify your bike in one hour by following the installation video and manual. Don’t forget to choose the correct wheel size!
After setup is complete, ride around the town with pedal assist or switch to E-bike mode for longer trips. Commuters, long-distance trekkers, and mountain bikers can cruise up to 24 miles per hour. The battery is not included.
Price at time of publish: 579
Best for Commuting
Swytch Universal eBike Conversion Kit
Daily riders will love this easy-to-install, lightweight e-bike conversion kit. It is compatible with most mountain, road, hybrid, and step-through bikes, and disc brakes.
It’s as easy to install as swapping out your front tire. The controller and battery are combined into a 34.2-Volt power pack, which is included in the kit and mounts to the handlebars. That makes it easy to remove and keeps thieves at bay, but our tester did miss having the use of a handle bar basket. The battery pack is fitted with indicator lights that tell you how much juice remains and what assist mode you’re in. Once the system is set up correctly, you’ll be able to top out at 15-25 mph.
In general, I love it. It makes my ride easier without feeling like I’m riding a giant bulky e-bike. It’s got a phenomenal amount of power for such a little machine and seems like it has a good battery life too. ~ Treehugger Tester
Ebikeling Waterproof Ebike Conversion Kit 36V 500W 700C Geared Electric Bike Kit
Do you want to go farther or faster? You can do both with this setup from Ebikeling, with its 500-watt motor. Ebikeling makes it easy to buy different compatible batteries and other accessories in an a-la-cart way. There are seven different batteries that come in different shapes (bottle, triangle, rectangular), so that you can pick the one that suits your bike and needs best.
The double-walled rim and motor are ready to install right out of the box—just swap them out for your original bike tire. An LCD screen is included to help you stay within your town’s speed limit. You can choose between a front or rear mount, as well as a thumb or half-twist throttle.
Price at time of publish: 390
AW 26×1.75 Rear Wheel 48V 1000W Electric Bicycle Motor Kit
Thanks to a 48-volt, 1000-watt battery, the AW wheel E-bike conversion kit satisfies anyone with the need for speed. A thumb throttle makes speed control simple. This kit is available as either a front wheel or back wheel conversion option. It fits any 26-inch bike frame with a 3.9 inch front dropout spacing (for a front wheel conversion) or 5.3 inch rear dropout spacing (for a back wheel conversion). The rear wheel kit weighs 24.7 pounds, the front wheel kit weighs 23.5 pounds.
The aluminum frame offers durability and stability, which is essential when you’re rolling at top speeds of 28 miles per hour. Hand brakes turn the motor off automatically to both improve safety and conserve battery power.
Price at time of publish: 300
Easiest to Install
Rubbee X Conversion Kit
If you want the fastest conversion possible, and even the option to take a motor off your bike quickly, the Rubbee X makes it a snap. The Rubbee X gives you a boost by resting against the rear tire, and has a special release that lets you remove the motor without un-mounting the entire system. You control the power just by pedaling, as a wireless cadence sensor that gets mounted to the pedal crank sends information to the motor, which shifts automatically without any additional user interface.
This conversion kit has some other nice features. It has tail lights on the back of the motor, to give you some additional visibility when riding at night. The base model comes with one battery, which weight 6.1 pounds, gives you 250 watts of power and has a top speed of 16 mph. Upgraded models have two or three additional batteries, each offering more speed and power, but also adding more weight. It’s compatible with any frame type, and with tires that are between 0.5 and 2.5 inches in width and between 16 and 29 inches in diameter.
There are a few things to keep in mind before you buy. First, the product ships from the European Union, so there may be an additional import tax. Second, you’ll want to make sure you have plenty of room on your seat post to connect the motor.
Price at time of publish: 612
Whenever you’re buying a newer technology, sticking with a known brand makes sense. That makes Bafang’s E-bike conversion kits a sound choice—in terms of quality and price. If speed is what you’re after, the kits from Ebikeling.
What to Consider When Shopping for an E-Bike Conversion Kit
Is the battery included? You’ll need something to power and charge your e-bike conversion kit. Many kits include a battery. Cheaper kits may not, though, which means you’ll need to source a compatible battery separately.
You’ll also want to think about your power needs. The higher the motor wattage, the more power you’ll get. A 250-watt motor is typically plenty of power to make the daily commute less sweaty. If you want to take your converted bike out on tougher mountain trails, you’ll want more power.
Keep in mind that according to U.S. federal regulations, e-bikes with more than 750 watts of power are considered motor vehicles and require a motorcycle license.
You’ll want to check your state and local laws as some cities and towns have banned e-bikes from bicycle paths, so if that’s where you want to ride, you’ll want to make sure your town allows your upgraded bike to cruise around on them.
E-bikes come in three classes:
- Class 1 E-bikes that assist you while you pedal and top out about 20 mph.
- Class 2 E-bikes have a throttle that assists you regardless of whether you pedal and have a top speed of 20 mph.
- Class 3 E-bikes assist you while you pedal and top out about 28 mph.
Drive Type and Installation
There are several kinds of e-bike conversion kits, and the ease of set-up and installation varies.
- Friction Drive Conversion is a simple strategy. A roller pushes against the tire on the wheel. When the roller turns, the wheel turns. It’s a reasonably easy system to set up but sometimes isn’t the most effective.
- Mid-Drive Conversion is the technology that the best e-bikes tend to use. A weight sits at a low point on the bike frame, and the power is applied to the crank. These can be more expensive, but the technology is typically better. There’s no standardization, however, which can make figuring out exactly what you need to make your bike work a little more challenging. Adding the parts is also a bit more complex than friction drive conversion.
- Electric Bike Wheel Conversion swaps out a non-electrified front or rear wheel with an electrified one. The process is simple depending on where and how the battery mounts—such as on a rear rack. Once installed, weight distribution can feel natural. However, powering the front wheel may impact your bike’s handling.
The difficulty of installation depends of the type of conversion kit, as well as your comfort with the tools required. But generally speaking, converting your bike is a DIY project. Many manufacturers offer how-to videos that show what’s involved, so you can see ahead of time what you’ll need to do.
You’ll need a bike tool, crank arm tool, adjustable wrenches, and a screwdriver along with your electric bike conversion kit. These demos can show you how to install your e-bike conversion kit.
A visit to your local bike shop mechanic is a helpful step in the decision-making process. They can help you determine if your bike is a good candidate for electric technology. Your old bike may not be able to be converted because adding a motor can increase torque. You’ll want to make sure your bike’s drivetrain can handle it. The extra weight from adding an electric motor also impacts your brakes, so you’ll want to make sure they are effective for stopping at a higher speed. E-bikes tend to have disk brakes for this reason. If your current bike is in disrepair, has old parts, or needs other improvements, it may be more cost-effective to sell your trusty old ten speed and buy an e-bike. Also, consider that a quality electric bike conversion kit can be nearly the cost of an electric bike. Do some comparison shopping between the price of a conversion kit and a fully-loaded e-bike before you decide which way you want to roll. Our picks for the best e-bikes may help guide your decision.
Why Trust Treehugger?
Treehugger has reported on dozens of e-bikes and e-bike conversion options over the past decade. To make this list, we deeply researched the market by reading other third-party reviews, user Комментарии и мнения владельцев, and enthusiasts blogs. We also considered the product’s value and the manufacturer’s reputation.
Author Heidi Wachter has been writing about travel and adventure for over a decade. When she’s not writing, you’ll likely find her riding one of her six bicycles—even in the winter.
The best electric bike conversion kits 2023 and how to fit them
The best electric bike conversion kits can give you an extra boost of power without the expense of purchasing a new electric bike. We’ve fitted some of the best e-bike conversion kits ourselves, so will walk you through the process, how easy it is and how the different systems perform.
E-bikes are soaring in popularity – and for good reason. The best electric bikes replace a car for running errands around town and greatly increase the distances it’s possible to ride on one of the best commuter bikes. An e-bike can also be a great tool for boosting your fitness, whether that’s enabling you to ride with a greater range of people or offering the motivation of a greater range of roads to explore.
But is an e-bike worth it,? As the best ebike conversion kits promise to add power to an ‘analogue’ bike for a lot less than a full ebike, it’s an easy, cheaper way to get an electric boost.
In this guide we’ll take you through the surprisingly broad range of benefits an e-bike conversion kit has to offer and – most importantly – how to perform an e-bike conversion, based on our hands-on experience. For a walk-through on how to do it, you can check out the video above or read on for a step-by-step guide – it genuinely is so much simpler than you would think.
When buying an ebike conversion kit there are a number of factors you’ll need to consider. Most importantly you’ll need a kit that will fit your bike. To help with this it pays to take a few frame measurements, notably the width of your forks and the width of the rear stays, as well as noting the wheel size and the type of brakes. You can then match these details to the kit specifications.
Naturally you’ll also need to consider the cost and how much you chose to spend on an ebike conversion kit will be dictated by not only your budget but also your needs. If you’re unsure of just how much you’ll use the converted bike then it’s prudent to opt for a cheaper kit. you can always upgrade down the road.
You’ll also want to consider where the motor will be located, and match this to your bike and your mechanical prowess. Front hub motors are typically the easiest to fit, while mid-drive motors require more effort. A rear hub motor lies somewhere in between the two, and like a front hub option is applicable to a wide range of bikes.
Other considerations include the type of battery and the wattage rating. 36 or 48 volt battery is standard, with wattage usually running from 300 to 600 watts.
The Swytch kit is super-simple: just swap out your front wheel, wire up the controller and battery and you’re off. The battery is also very compact, allowing you to remove it from the bike easily to carry with you.
The TongSheng kit positions the motor at the centre of the bike, so it will fit to a wide range of designs. It’s lightweight for its high torque and power output, although you’ll need to buy the battery separately.
The Voilamart kit is an inexpensive rear wheel conversion option, although you’ll have to source a battery separately. It’s slightly fiddly to fit as well and requires additional waterproofing if you plan to ride in wet weather.
The best electric bike conversion kits
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Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.
Wheel sizes: Each wheel is custom built – specify your required size at checkout (Bromptons also catered for)
Reasons to avoid
The newly updated Swytch system is one of the simplest conversion kits to fit out there. The latest version, launched in August 2022, has a smaller, neater battery pack that improves the bike’s dynamics and lowers its weight. There’s the choice of the Air battery (700g, range 15km) or the Max battery (1,100g, range 30km). Both use the same mount, which places the battery to the front of the handlebar.
The motor sits in the front hub and we found it to be pretty discreet. Incidentally, the new batteries will work with the original motor and pedal sensor, so if you already own the original kit you can upgrade it with just a new battery without having to buy the whole kit again.
The Swytch kit is incredibly easy to fit. It took us around 30 minutes working at a steady pace.
We tested it on both a reasonably light two-speed steel bike and a heavier Pinnacle utility bike. It transformed the ride of the two-speed bike, making it fast, nimble and responsive. We also found the stated range to be conservative: after 20 miles on setting number two (medium assist) it had only used two bars out of five on the battery.
With the heavier Pinnacle on maximum assist (and on draggy routes) we were getting slightly under the 30km for the Max battery. As with all e-bike batteries, range depends on the terrain, weight of bike and level of assist.
Great customer support makes this one of the best kits for people who are new to working on their bike and who aren’t familiar with electrics. And even if you do have a strong background in both those areas, a simple system is always appreciated.
Reasons to avoid
Like the Bafang mid-drive system below, the TongSheng offers the same benefits of compatibility with a wide range of bike designs and a high torque for steep hills and off-road terrain. However, the TongSheng mid-drive does manage to be a little lighter than the Bafang for approximately the same power.
This model doesn’t come with a battery included, so you’ll have to source your own 36v item. As a rule of thumb, around 10Ah will give a range of 29km / 18mi, whereas going up to 18Ah will typically give around 53km / 33mi, so be sure to factor that in when you’re making your choice.
There’s a huge range of batteries sold on Amazon, but Green Cell is a particular brand we’d recommend.
We found fitting to be reasonably easy. As with most mid-drive systems, you replace your crank and chainring with the one provided in the kit. There’s an LCD display for attaching to your handlebars and you’ll need a battery to be hooked up to the motor.
Read more: TongSheng TSDZ2 conversion kit review
Reasons to avoid
A mid-motor drive system offers a number of benefits over hub-driven conversion kits. With the power delivered at the cranks it can produce more torque, making it more effective on particularly steep and bumpy terrain.
Another perk is that the compatibility is much greater – no concern about wheel diameters, hub widths, axle standards and brake type. No matter whether you’re running rim brakes or disc, quick release or thru-axle, the crank driven system is compatible with all.
The only proviso is that the frame material must be alloy and the bottom bracket width is 68–73mm – but that covers most bikes you’re likely to be fitting this system to.
There are a few aspects to be aware of, the first being that this system doesn’t include a battery and that typically makes up about half the cost of a conversion kit. Finding an e-bike battery is quite straightforward with many being sold on Amazon, with Green Cell being among those we’d recommend.
Just make sure to get a 36V one for this motor as a higher voltage can damage it. Also you should be aware that capacity of 10Ah will give you a range of about 29km / 18mi, while a capacity of 18Ah typically gives about 53km / 33mi – so be sure to factor in the distances you’re planning on riding.
Reasons to avoid
This radically different approach from Rubbee makes for an e-bike conversion with much fewer parts. The battery and motor are housed in a single unit which powers the bike directly turning the rear wheel with its integrated roller.
Not only is the initial installation notably fast and easy, the quick release system means that you can take off the unit for rides that you don’t wish to be assisted on. At 2.8kg, it doesn’t add much weight to that of the bike, making the bike easier to handle.
The range of this model is quite low, limited to Eco mode it only offers a range of 16km / 10mi – although taking the device off to charge at the other end is easy to do and it only takes an hour to top up. There is the option to increase your range by buying additional battery modules that fit into the base unit.
Up to three can be accommodated, which in turn increases the maximum range to 48km / 30mi, or around 23km / 14mi with moderately heavy use. However, unlike many other e-bike systems, the Rubbee X supports regenerative braking, allowing you to scrub back some power on the descents.
Reasons to avoid
Bafang is a well established maker of electric bike motors and offers a front hub based motor, if you’re not a fan of the bulky profile a mid motor conversion system creates. You can buy this kit without a battery – although why would you? – but if you sensibly also opt for a power-pack there’s a choice of amp hours, and you can select either a downtube or a rear-rack mounted version.
The setup follows the same principles as most front-wheel e-bike conversions. First you need to set up the wheel with a disc rotor, tyre and inner tube and install that into the bike. Then attach the cadence sensor – so it can tell when you’re pedalling and need assistance – then attach the battery and the LCD display and you’re essentially good to go!
It’s worth bearing in mind that although this conversion kit comes in many different wheel sizes, it is only compatible with bikes that have a front disc brake and a Quick-Release axle. If your disc brake bike is a newer, more expensive model, it might not be compatible, so worth checking first.
Remember, that in the UK electric bike laws mean that e-bikes are not permitted to have a power output of more than 250w and shouldn’t propel the bike when it’s travelling more than 15.5mph – you’ll have to make sure you select the right model with the relevant limitations.
Reasons to avoid
We’ve also tested the Voilamart kit, which comes with six main parts: the replacement rear wheel, the replacement brake levers, the control screen, pedal sensor, throttle and the control box. It doesn’t come with a battery however.
On review we found the kit pretty straightforward to fit, although you’ll need to remove the bike’s crank to fit the pedal sensor and this element of the conversion was a bit fiddly. Another potential drawback is that the connectors, which link to control unit, aren’t waterproof, with only a bag supplied to house the delicate electronics. While it does a good job of keeping everything tidy, we decided to buy a plastic enclosure, cut the wires to length, solder the connections and then heat shrink for added protection.
As for the ride, the rear wheel kit delivers plenty of power. However, since the pedal sensor only detects when you’re pedalling rather than how hard you’re pedalling it delivers the power as soon as your start to turn the crank arms. Fortunately, you can quickly adjust the level assistance, with five power options available.
All in all the Voliamart rear wheel kit is an affordable way to ‘go electric’, although it requires you to be mechanical competent to fit it and you’ll need to factor in the additional cost of a battery.
How to convert your bike to an e-bike in four steps
Here’s our step-by-step guide to how to add an electric bike conversion kit to your pedal-powered bike.
Swap the tyre and tube
Firstly, remove the tyre and tube from your current front wheel and then install them on the new wheel from the kit. Make sure to check if the tyre is directional, if it is, ensure that the tyre is mounted so that the cable sticking out of the hub is on the left-hand side (non-driveside) when the wheel is installed in the bike – otherwise it’ll be powered in the opposite direction to your direction of travel!
To swap the tyre and tube over, you will need some tyre levers and a pump. If you want to go over how to do these, we have a guide that can be accessed here.
Final points are to do up the nuts on the wheel’s axle to keep it firmly in place in the forks and to check that the brakes are correctly adjusted for the new wheel. If you’re unsure how to do that, we have another guide here.
Attach the bracket to the handlebars
There is a strap that needs to be attached to the bars to keep the bracket in place and stop it rotating around. There are also some adaptors included in the kit which can be used if your handlebars are a little skinnier.
But essentially all that’s needed to be done here is a couple of screws to clamp the bracket tightly to the bars.
Attach magnet disc and sensor
The magnet disc has a split design so it can just clip around the inside of the left (non-driveside crank) and is then held in place by its retention ring. Next, stick the sensor on the frame directly in line with the magnets – this will ensure that the sensor can tell when the cranks are moving.
Plug in the cables
The thickest one is the main power cable and that just needs to be plugged into the cable extending from the hub. The other orange cable attaches to the cadence sensor and this just needs plugging in as well.
It’s then a good idea to use some cable ties to tidy up the lengths of the cables a little bit, so they aren’t flapping about and risk getting caught on the spokes or on the cranks.
The blue cables, you don’t need to worry about, these are for an optional brake sensor upgrade kit.
Why convert your bike to an e-bike?
What types of conversion kit are available?
You can get conversion kits that power your front or rear wheel or power the bikes via the cranks.
Wheel-based systems usually have a hub motor and require replacement of your existing wheel with a compatible motorised one.
The alternative is a system like the Rubbee that drives your wheel by pushing on the tyre. Tyre wear can be an issue here though.
Finally, there are systems that power the e-bike via the bottom bracket.
Usually the e-bike’s battery will bolt onto your frame or be attached to your handlebars, although sometimes you can fit a battery pack to a rear rack.
We’ve more on compatibility. which can be an issue. below.
How much does it cost to convert a bike to an e-bike?
vary depending on the type of conversion kit and the size of the battery. To give a rough Band, you can expect to pay a total of between £500 and £800 from a reputable brand, but there will be outliers at either end.
Is it worth converting a bike to an e-bike?
There are many reasons to upgrade your bike to offer a little e-assistance. On the one hand, it can greatly increase the usefulness of your bike, enabling you to replace short car journeys – such as around town, to the shops, or to work – with going by bike instead.
It’s a lot more environmentally friendly getting about on two wheels than in a two-ton metal box. It can also save you time – bikes are able to take more direct routes and are less affected by traffic, as well as eliminating the need to search for a parking space at the other end.
But beyond just their practical benefits, e-bikes can also be a potent tool for boosting your fitness. Consistency is key when it comes to exercise, so making commitments with friends is a great way to ensure you’re heading out the door. Previously, differing fitness levels could make it difficult to find a riding partner but with an e-bike levelling the playing field, getting in a productive workout (for both of you) with a friend is much easier to do.
Added to that, an e-bike can be much more motivating in that it opens up a far greater range of roads than you’d be able to access just under the power of your own two legs. Exploring new roads is part of the fun of riding a bike and an e-bike can help preserve that.
Can you convert any regular bike to an e-bike?
Most bikes can be converted to an e-bike – it just requires getting the matching the right conversion kit to match the specification.
For conversion kits where the motor is located at the wheel’s hub, you’ll need to consider the wheel’s diameter, the width and axle standard of the hub and whether it uses rim or disc brakes. For instance, a 700c (AKA, 28”) disc brake wheel with a 100mm wide quick-release hub is a relatively common spec. Once you’ve determined what type of wheel you need, the conversion is quite a straightforward process
Crank driven systems are generally easier in terms of determining compatibility; the requirements are typically just an alloy frame and a bottom bracket width of between 68 and 73mm – which is the standard for all road and mountain bikes, it’s only specialist bikes that have a different spacing there. In replacing the crankset, these systems are a bit more involved to fit than a hub system, but still well within the remit of a home mechanic.
Other kits, such as those that directly drive the rear tyre, have almost universal compatibility – provided your tyres aren’t too heavily treaded.
Are electric bike conversion kits any good?
You won’t be getting the very best motors and the largest, seamlessly integrated batteries with an e-bike conversion kit. But with that said, e-bike conversion kits are much cheaper than purchasing a whole new e-bike and they do deliver many of the same benefits.
Converted e-bikes are great for commuting and utility cycling, giving that extra boost to help flatten hills, motor along the flat and lug about heavy loads. E-bike conversions are also good for leisure cycling, helping to moderate your effort level as needed and greatly extending the range you can explore.
For more specialist utility needs, buying a new cargo e-bike would help boost your carrying capacity and range. Equally, for the aesthetically conscious, the latest breed of e-road bikes are almost indistinguishable from a non-powered bike at first glance. Then again, both those options are much more expensive than a conversion.
How we test
Where we’ve been able to link to a review, it means that we’ve put the ebike conversion kit through its paces. We’ve assessed how easy it is to fit and maintain as well other factors such as quality of the components and battery life and charge time. Riding the bike once fitted with the kit, we’ve taken into account the ride quality, the ease of use and the battery range.
Where we haven’t yet had the chance to review an item, we’re still confident in recommending it as one of the best, because we either know the brand really well, and have probably tested another product or the previous version and can still happily recommend it as one of the best.