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.

The YS YOSE POWER Waterproof Ebike Conversion Kit is a comprehensive solution for transforming a regular bike into an electric version. It's particularly suited for those interested in a 26-inch rear wheel setup, thanks to its 48V500W brushless gear motor. The motor provides a respectable torque of 67 N.m and can reach speeds up to 40 km/h, making it a strong contender for city commuting or light trail riding.

A standout feature is its compatibility with both disc and V brakes, as well as 8 to 10 speed freewheel cassettes, making it versatile for different bike types. The kit includes all the necessary components like a battery, controller, display, throttle, and brake levers, although the tire is not included, which is something to consider when budgeting for a complete conversion.

The 48V13Ah battery is equipped with a 30A BMS for protection, promising a decent range and safety. The integrated controller simplifies installation by being part of the battery holder base. The LED display offers useful information such as battery levels and ride metrics, which is handy for managing long rides.

On the downside, the kit requires some technical skill for installation, which might be challenging for beginners. Its maximum weight recommendation of 25 pounds may not suit heavier riders or those carrying extra loads. Additionally, while the waterproof connectors are a plus, the lack of a tire could be an inconvenience for some users.

The kit comes with an 18-month warranty on battery cells and motor, and a one-year warranty on other components, which provides some peace of mind. It offers a good balance of power and compatibility, making it a viable option for adults looking to enter the electric bike scene with an existing bicycle.