Electric Bicycle Setup: A Step-By-Step Guide

Electric bicycles, or e-bikes, are a great way to commute, climb steep hills, and explore natural areas. They can be expensive, but there are ways to build one yourself by converting an old bicycle or moped. This can be a complex process involving the installation of a battery, motor, throttle, brakes, and more. The first step is to get an electric bicycle conversion kit, which typically includes a throttle, speed controller, and a wheel with a hub motor. You will also need to select a battery, which will determine the voltage and speed of your bicycle. The next step is to mount the motor and place the chain on the chainring. You will then need to adjust the shifting and check the bike's chainline. Finally, you will need to test the e-bike and adjust to any necessary settings, such as maximum speed and acceleration.

Choose a conversion kit

When choosing an electric bike conversion kit, it is important to consider your personal requirements and do your research. Familiarise yourself with the laws regarding e-bikes in your region, as power output, throttle assist and maximum speed may be regulated. You should also consider your range and journey needs—for example, if you live in a hilly area, you may require more top-end power.

There are thousands of electric bike conversion kits on the market, with new brands constantly emerging. It is important to choose a reputable brand that offers support and complies with the laws in your territory. One of the largest and best-known electric bike motor companies is Bafang, which covers everything you need for a mid-drive motor conversion kit. The TongSheng kit is another option, which positions the motor at the centre of the bike, allowing it to fit a wide range of designs.

The Swytch Kit is a popular choice, with over 80,000 people worldwide having converted their bikes with this kit. It is known for its simplicity, low weight, and low cost. The kit includes a battery, charger, pedal sensor, motor wheel, and more. The battery is compact and removable, and the kit is easy to install.

Another option is the Skarper DiscDrive, which offers one of the widest compatibilities of any e-bike system. The Cytronex kit is also available for Brompton bikes and standard bikes.

When choosing a kit, consider the brakes, as the extra weight and increased potential speeds of an electric bike will put more stress on the brakes. It is recommended to choose a bike with disc brakes for better braking performance.

Install the motor

Installing the motor is a crucial step in setting up your electric bicycle. There are two main types of electric bike conversion kits available: mid-drive and hub motors. Mid-drive conversions typically offer higher performance but come at a higher cost and increased maintenance requirements. On the other hand, hub motors are more affordable and are commonly found in front-wheel or rear-wheel configurations.

If you're opting for a hub motor, the installation process is relatively straightforward. Start by removing the existing wheel that you plan to replace. This typically involves loosening the brake cable and the wheel's quick-release lever. If your bike has disc brakes, you may need to remove the retaining pin or clips holding the pads in place. Once the wheel is removed, you can transfer the tire and tube to the new wheel with the hub motor. Remember to deflate the tire before removal and ensure it is properly inflated and seated inside the rim during installation.

After mounting the new wheel, you'll need to place the chain on the chainring. "Narrow-wide" chainrings are often recommended for single-ring setups as they provide a better grip. Adjust the shifting as needed and pay attention to your bike's chainline. Running at low gear can stress the gear cassette and chain, while high gear can burn out the motor if used excessively.

If you're installing a mid-drive motor, the process may vary depending on the specific kit and your bicycle. It's important to refer to the instructions provided with your conversion kit for detailed steps. However, some general considerations for mid-drive installations include ensuring that your wheels are spinning true to avoid any wobbles when power is applied to the motor. Additionally, reinforcing the fork area may be necessary, especially if you plan on using your electric bike frequently, as the bulk of the added weight comes from the motor and batteries.

Remember to choose a battery that is compatible with your motor and conversion kit. The voltage and capacity of the battery are crucial specifications to consider, ensuring they fall within the allowed range specified by the motor manufacturer. The battery voltage will impact the power and speed of your electric bicycle.

Select a battery

Selecting a battery is a crucial step in setting up your electric bicycle. The battery is the power source that provides the electric motor with the energy needed to propel the bicycle. Here are some important factors to consider when choosing a battery:

Voltage and Compatibility:

The voltage of the battery is essential for achieving the desired speed and power. Higher voltages generally result in increased speed and performance. Ensure that the battery's voltage falls within the allowed range specified by the motor. Additionally, verify that the voltage and capacity of the battery are compatible with your electric bicycle conversion kit.

Battery Type and Technology:

Lithium-ion (Li-ion) batteries are the most commonly used type in electric bicycles due to their balance between energy density, weight, and lifespan. They offer a range of 100-150 miles on a single charge. However, there are other variations to consider, such as Lithium-ion Polymer (Li-pol) batteries, which offer flexibility in shape and size, and Lithium Manganese (LiMg204) batteries, which provide a balance between energy density and safety while reducing the risk of overheating.

Capacity and Range:

The battery's capacity, typically measured in amp-hours (Ah), determines how long it will last. Consider your typical riding distance and usage. If you plan on taking shorter trips, a lower capacity battery, such as a 10Ah, may suffice. However, if you intend to travel longer distances or require more power, opt for a higher capacity battery, such as a 20Ah.

Cost and Value:

Electric bicycle batteries can vary significantly in price. It's important to understand your budget and what you can afford. Compare the features, range, and performance of different battery options within your price range to make an informed decision.

Safety and Durability:

Prioritize batteries with a reliable Battery Management System (BMS) that ensures safe operation by regulating cell voltage, protecting against overcharging, and optimizing performance. Additionally, consider the durability and longevity of the battery, especially if you plan to ride in varying weather conditions or challenging terrain.

Adjust the settings

Adjusting the settings on your electric bicycle will depend on the type of bike and kit you have. If you want to adjust the motor's settings, you may need to purchase a USB programming cable. This will allow you to connect the motor to a Windows PC and adjust settings such as max speed, acceleration, and regenerative braking.

If you have a throttle, you can adjust the speed and acceleration by twisting or pushing on the throttle. Be very careful when using the throttle, especially when the bike is at a complete stop, as unknowingly engaging the throttle can throw you off balance and cause harm.

You can also adjust the settings on your bicycle by changing the gears. When riding at low gear, you will stress the gear cassette and chain, whereas riding at high gear will burn out the motor if you're attacking multiple hills per day. Therefore, make sure you downshift when stopping and shift to higher gears when you regain speed.

Additionally, you can adjust the settings of your bicycle by choosing the right battery. The voltage of your battery will determine the power of your bike, so select a 36- or 48-volt battery for speed and comfort. The capacity of the battery will define how long it lasts, so choose a 10Ah for short trips or a 20Ah battery for longer journeys.

Test ride and safety checks

Once you've set up your electric bicycle, it's important to conduct a thorough test ride and safety check before hitting the roads. Here are some detailed steps to guide you through the process:

Inspect the Wheels and Tyres:

• Check that both wheels are attached securely to the bike. Ensure that quick-release levers, if present, are clamped down and tightened against the fork or frame.
• Inspect the tyres for any punctures or leaks. Ensure the tyres are inflated to the correct pressure, as optimal tyre pressure varies between road and mountain bikes.
• Check the wheels for any wobble or irregular spinning. Any instability will be magnified when the electric motor is engaged.

Familiarise Yourself with the Controls:

• Take time to understand the bike's controls and display panel. Familiarise yourself with power modes, assistance level adjustments, and brake activation.
• Learn how to operate additional features such as lights or a horn. This will help you feel more confident and in control during the test ride.

Wear Appropriate Safety Gear:

• Put on a well-fitted helmet to protect your head in case of falls or collisions.
• Wear comfortable and sturdy closed-toe footwear to ensure a secure grip on the pedals.

Choose a Safe Location:

Begin your test ride in a controlled and safe environment. Look for open spaces with minimal traffic, such as a parking lot or a quiet street.

Check Local Regulations:

Be aware of local regulations regarding electric bicycle usage. For example, in some places like New York City, you must be 16 or older to ride an electric bike.

Regular Pre- and Post-Ride Checks:

• Develop a habit of conducting regular pre- and post-ride safety checks. Get to know your bike to identify potential issues early on.
• Listen for irregular mechanical noises, frame creaks, or unusual behaviour while riding, and address them promptly.
• Keep your chain lubricated to ensure efficiency and prolong the life of your drivetrain.

Frequently asked questions