10 Best Electric Bicycle Conversion Kits 2025 in the United States

The Bafang Mid Drive Kit (models BBS02B and BBS-HD) is a versatile electric bike conversion kit compatible with bottom brackets between 68-73mm and suitable for various bike types including mountain bikes, city bikes, and recumbent trikes. It offers motor power options of 500W, 750W, and 1000W, powered by a 48V or 52V system, delivering strong torque ranging from 100 to 160 Nm. This allows the bike to tackle hills and different terrains with speeds up to 45 km/h.

The kit includes most necessary components such as brake levers, chainwheels, throttle, speed sensor, and installation tools. However, the battery and LCD display are optional and must be purchased separately, which is important to consider for those seeking a complete setup immediately. Installation is designed to be beginner-friendly, supported by manuals, online videos, and US-based customer support to assist if needed.

There are some limitations, including the requirement for specific bottom bracket sizes and compatibility only with bikes that have disc or V-brakes and chain drives, so it may not fit all bicycles. Additionally, 73mm screws are not included, which may entail extra cost or effort. For users comfortable with some DIY assembly, this Bafang kit provides powerful and customizable performance along with reliable support, provided the bike’s compatibility and battery purchase are carefully planned.

The LIVALL PikaBoost 2 is a rear wheel electric bike conversion kit designed for road bikes that feature round seatposts between 25-35mm. It uses a hub motor with motor power suited for casual to moderate riding, supported by a 220Wh battery offering a respectable range of up to 70 km (43 miles) under ideal conditions. This battery capacity is good for shorter commutes or recreational rides rather than long-distance travel. The kit includes a battery management system (BMS) ensuring safety and longevity, along with smart features like an app for easy installation, calibration, and mode switching. The app also allows remote troubleshooting and group ride functions, adding a modern touch to the riding experience. Charging options are flexible with both direct and removable battery charging; the system supports fast charging and even functions as a power bank for other devices.

Installation is user-friendly without extra wires and allows quick switching between electric and manual modes. However, this kit is compatible only with certain bike types—specifically not suitable for children’s bikes—and requires a 65W USB-C charger (not included). The ride quality benefits from a durable V-shape tire and safety features like automatic motor shutoff if tipping is detected to reduce accidents. The kit is lightweight and portable with a solid aluminum alloy frame for durability. A limitation is its single-speed setup, which might not suit riders needing multiple gears for varied terrain.

The included display and controller are integrated via the app rather than traditional hardware screens, which might be less intuitive for some. In summary, the LIVALL PikaBoost 2 presents a smart, safe, and convenient option for adults wanting to upgrade a compatible road bike to electric, particularly if preferring app-based control and a tidy installation. It is ideal for daily urban rides and moderate distance trips but may fall short for more demanding or off-road cycling needs.

This AW 26" x 4" Fat Tire Electric Front Wheel Conversion Kit is designed to turn a standard 26" bicycle into an electric one with ease. It features a powerful 48V 1000W brushless hub motor, which is efficient and gearless, helping you reach speeds up to about 28 mph (45 km/h). This speed is quite good for city commuting and short trips. The kit fits most 26" bikes with a 5 5/16" front dropout spacing, making it fairly versatile. One notable feature is the dual mode controller that switches between Hall effect and non-Hall effect operation. This means if some parts fail, the motor can still function, adding reliability and extending its life.

The pedal assist system (PAS) is a big plus, as it senses your pedaling and helps power the bike without needing to hold the throttle, which can reduce wrist strain and make longer rides more comfortable. The aluminum alloy frame adds strength and stability, supporting riders up to 220 lbs. Since the motor is in the front wheel, the system avoids chains or gears, reducing friction and maintenance. Safety is addressed with brake levers that cut power during braking, ensuring better control.

This kit offers a straightforward, powerful front-wheel electric boost for casual rides, especially on 26" fat tire bikes. Users should ensure compatibility carefully and may need to consider additional components for a complete setup.