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 eBikeling 48V 700C Rear 1500 Watt Ebike Conversion Kit is a strong option if you're looking to upgrade a traditional bike to electric power. With a powerful 1500-watt motor and 48-volt system, it offers plenty of boost for speeds up to 30 mph, which is suitable for various riding conditions, from city streets to mild hills. The kit includes essential components like a motorized rear wheel, controller, throttle, display, pedal-assist system, and brake levers, making installation more straightforward. It's important to note that the battery and tire are not included, so you’ll need to source those separately.

Its waterproof design means you can ride confidently in different weather without worrying about damaging the motor or electronics. The kit’s compatibility with 700C wheels covers many common bike types, including mountain bikes and cruisers, adding versatility. On the downside, the kit is a bit on the heavier side at around 26 pounds, which might affect the bike’s handling when not powered. Also, while the motor and battery have a solid one-year warranty, the other parts only come with three months of coverage, so keep that in mind for long-term reliability.

This kit represents a durable and effective choice if you want a powerful electric boost and are comfortable with installing parts yourself or with some help.

The BAFANG 48V 750W Electric Bike Conversion Kit is a powerful option for converting a regular bike into an electric one. The mid-drive motor offers 750W of power, which provides a significant boost and can reach speeds up to 40 km/h, making it suitable for both commuting and leisure rides.

The kit includes a C18 display, a thumb throttle, and a 44T chainring, allowing users to monitor and control their ride easily. The battery has a substantial capacity of 15Ah and offers a range of up to 80 km, which is quite impressive for long-distance travel. Additionally, it features two riding modes: e-bike and pedal support, giving users flexibility depending on their needs.

The compatibility with disc brakes enhances safety and driving comfort. At 6.99 kilograms, it might add considerable weight to the bike, which could be a concern for some users. Assembly is required, which might be a bit challenging for those not mechanically inclined. The kit's higher power might be overkill for casual riders, making it ideal for those looking for a robust solution to convert their bike into an e-bike and enjoy a mix of physical exercise and powered assistance.