Otis Singleton
Converting a bicycle to electric is a great way to enjoy the benefits of power-assisted cycling without the cost of a new e-bike. Electric bike conversion kits are widely available and can be purchased online. The kits typically include a battery, charger, pedal sensor, motor wheel, and other necessary components. The process involves adding a hub motor to either the front or rear wheel or incorporating a drive unit near the bicycle's crank. It's important to consider factors such as wheel diameter, hub width, axle standard, and brake type when selecting a kit. While conversion kits may not offer the most advanced motors or integrated batteries, they provide a cost-effective solution for those seeking electric assistance on their rides.
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What You'll Learn
Conversion kits
Electric bike conversion kits are a popular and more affordable alternative to buying a pre-built electric bike. They are also a more sustainable option, allowing cyclists to convert perfectly good bikes that are sitting unused in their garage.
It is also crucial to ensure that the battery voltage and output match the motor. In addition, the charger must be compatible with the battery to prevent safety hazards. Different kits offer different battery sizes and motor powers, which will determine how long the battery will last at full power.
Some popular options for conversion kits include the Swytch Kit, which offers lightweight, easy installation and powerful performance. The kit includes a wheel, power pack, pedal sensor, charger, and all necessary cables. Another option is the Geekay BLDC Hub Motor Kit, which offers high-performance components and a waterproof 'Plug n Play' connection. For those looking for a DIY option, the Luna Cycle kit is a good choice, although it may require more time and money if you are not experienced in bike repairs and modifications.
Before purchasing and installing a conversion kit, it is important to consider the legality of using an electric bike in your region. Different locations have varying regulations regarding the power, speed limitations, and throttle requirements of electric bikes.
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Compatibility
One of the most popular methods is to add a hub motor to either the front or rear wheel. To determine compatibility, you'll need to consider the wheel's diameter, width, and axle standard, as well as the type of brakes you have (rim or disc). For example, a common specification is a 700c (28") disc brake wheel with a 100mm wide quick-release hub. Once you've determined the type of wheel you need, you can choose a compatible hub motor kit.
Another option is to use a crank-driven system, which typically requires an alloy frame and a bottom bracket width of between 68 and 73mm. These systems tend to be easier to match to your bike since they have fewer specific requirements.
It's also important to consider the compatibility of the power pack and other components. Some conversion kits include a power pack that can be strapped anywhere on the frame, while others have specific mounting requirements. The Swytch Kit, for example, includes a power pack that can be easily fitted to any handlebars and provides up to 378Wh of battery capacity.
Additionally, you'll want to ensure that the kit you choose is compatible with the laws and safety standards in your territory. This can be a daunting task, as there are many illegal and unsafe kits on the market. Reputable brands that offer support and have been tested and reviewed by trusted sources, such as Cycling Weekly, are a good place to start.
Finally, if you're building your own e-bike without a kit, you'll need to ensure compatibility between all the individual components, which can be a complex and challenging process.
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Batteries
Conversion kits are the most popular option, as they are affordable, convenient, and come with everything needed to electrify a bicycle. The cheapest kits are 24v brushed-motor kits, which can be purchased online for under $100. However, these kits are not known for their quality. They are underpowered, inefficient, and not durable. A step up from this would be a hub motor kit, which can be purchased for under $200, not including the battery. The next step up would be a kit from a reputable manufacturer, such as Bafang, CYC, or Luna Cycle. These kits are more expensive (around $1100), but they offer more power and better quality.
If you are confident in your electrical engineering skills, you could also purchase a battery separately or build one yourself. Off-the-shelf lithium-ion batteries are available, but they can be expensive. Building a battery pack yourself can save money, but it requires the right tools and skills, and you must ensure that it is safe.
When choosing a battery, it is important to consider the voltage and output. The battery voltage and output must match the motor to ensure compatibility and avoid safety issues. For example, a 100Wh (Watt-Hour) battery will last for one hour when the motor is outputting 100 watts of power. It is also important to ensure that the charger is compatible with the battery to avoid safety issues.
Finally, it is worth noting that the range of an electric bicycle will depend on various factors, including the terrain, weight of the bike, level of assistance, and battery size and power.
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Installation
The process of converting a bicycle to electric involves the addition of an electric motor and other components to provide an electric boost to your pedalling. This can be achieved through the use of electric bike conversion kits, which are widely available and offer a more affordable option compared to purchasing a new e-bike.
When installing an e-bike conversion kit, it is important to follow the specific instructions provided by the manufacturer. However, here is a general overview of the installation process:
Firstly, you will need to select the appropriate conversion kit for your bicycle. This involves considering factors such as the wheel's diameter, width, axle standard, and brake type. Crank-driven systems, for instance, typically require an alloy frame and a bottom bracket width of between 68 and 73mm. It is crucial to ensure compatibility between the conversion kit and your bicycle's specifications.
Once you have the necessary kit, the installation process can begin. If you are installing a hub motor, you will need to replace the front or rear wheel with the motorised wheel provided in the kit. This typically involves removing the axle, taking off the existing wheel, and securing the new motorised wheel in place. Ensure that the wheel is securely attached and aligned properly to avoid any wobbling during rides.
For a crank-driven system, the installation process may vary depending on the specific kit. However, it generally involves attaching the drive unit near the bicycle's crank. This may require removing the crankset and bottom bracket, installing the drive unit, and then reattaching the crankset. Again, ensure that all components are securely attached and aligned correctly.
After installing the motor, you will need to connect the battery. The battery pack is typically mounted onto the bicycle frame using velcro straps or a provided mount. Ensure that the battery is securely attached and won't shift during rides. Then, connect the battery to the motor using the provided cables. Some kits may also include a pedal sensor, which will need to be installed and connected as well.
Finally, test the e-bike to ensure that all components are functioning properly. Power on the bike and test ride it in a safe area to get a feel for the electric assistance. Adjust the settings according to your preferences, such as power levels and pedal assistance modes. Refer to the kit's manual for specific instructions on customising the e-bike's performance.
Converting a bicycle to electric can be a rewarding project, providing the benefits of electric assistance at a lower cost compared to purchasing a new e-bike. However, it is important to carefully follow safety guidelines and instructions to ensure a proper installation.
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Cost
The cost of converting a bicycle to electric depends on the type of kit and the quality of its components. The cheapest kits are priced at under $100, but they are not powerful, efficient, fast, sleek, or durable. The next least expensive option is a hub motor kit, which can be purchased for under $200 without the battery. A DIY kit from Luna Cycle costs around $1100 and includes everything you need to electrify your bike. Another user on Reddit mentions that they spent $200 on a 250w 36v kit.
A more premium option is the Swytch Bike Air kit, which is lightweight, simple, and compact. The TongSheng kit is also lightweight and has a high torque and power output, but you will need to purchase the battery separately. The Voilamart kit is an inexpensive rear-wheel conversion option, but it requires additional waterproofing for wet weather. The Skarper DiscDrive kit is compatible with a wide range of bikes and has a click-on system that minimizes compatibility issues.
The cost of a conversion kit for a high-quality road, mountain, or city bike can range from $1000 to $1800. On top of that, you will need to pay for labor, which costs around $200 for a mechanic to install the kit.
It is worth noting that converting a bicycle to electric may void the warranty and increase repair costs. There are also safety risks associated with converting a bicycle to electric, especially if the bike is not designed to house and protect a battery.
Overall, the cost of converting a bicycle to electric can range from under $100 to over $2000, depending on the quality of the kit and the labor costs.
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Frequently asked questions
Converting a bicycle to electric can be cheaper than purchasing a whole new e-bike, and it delivers many of the same benefits. Converted e-bikes are great for commuting, giving you an extra boost to help flatten hills and motor along the flat. They are also good for leisure cycling, helping to moderate your effort level and greatly extending the range you can explore.
There are thousands of electric bike conversion kits on the market, with prices ranging from under $100 to $1100. Some popular options include the Luna Cycle DIY kit, the Swytch Kit, and the Bafang kit.
When choosing a kit, you'll need to consider the type of motor and battery. Hub motors are the most common type, added to either the front or rear wheel. Crank-driven systems are generally easier to install, but may not be compatible with all bikes. You'll also need to make sure the kit is compatible with your wheel size and brake type.
Installation processes vary depending on the kit, but typically involve attaching the motor and battery to the bike, and connecting the necessary cables. You may need some basic electronics knowledge and general repair skills.
