E Bike Conversion Kit FAQ

E-Bike Conversion Kit FAQs

E Bike Conversion Kit FAQ

General Questions

What is an e-bike conversion kit?

An e-bike conversion kit allows you to convert your regular bike into an electric bike by adding a motor, battery, and display unit.

What are the benefits of using an e-bike conversion kit?

  • Save money compared to buying a new e-bike.
  • Upgrade your existing bike with electric assist.
  • Choose the motor and battery that best suit your needs.
  • Enjoy the satisfaction of building your own e-bike.

Is it difficult to install an e-bike conversion kit?

The difficulty of installation varies depending on the kit and your mechanical skills. Some kits are designed for easy installation, while others require more technical expertise.

What tools will I need to install an e-bike conversion kit?

The specific tools will depend on your kit and bike, but common tools include wrenches, Allen keys, crank pullers, and possibly a bottom bracket tool.

What are the legal regulations for e-bikes in my area?

E-bike regulations are crucial to consider, especially regarding motor power and speed limits. These regulations vary significantly by region. In Europe, for instance, regulations typically limit e-bikes to a maximum motor power of 250 watts and a speed of 25 km/h (15.5 mph) to qualify as a bicycle. It’s important to check your local laws to ensure your converted e-bike complies with regulations.

Motor Selection

What type of motor is best for me?

There are three main types of e-bike motors to consider:

  • Mid-Drive Motor: Replaces your existing bottom bracket, offering a more natural riding experience and better weight distribution. Popular mid-drive motor brands include Bafang and Tongsheng (TSDZ series).
  • Hub Motor (Front or Rear): Mounted directly in the wheel hub, offering a generally simpler and more affordable option. Front hub motors can affect steering, while rear hubs might put more strain on the drivetrain. Swytch Bike specializes in user-friendly front hub motor kits.

What motor power (wattage) do I need?

Motor power (watts) affects your e-bike’s performance in terms of speed, hill-climbing ability, and battery range. Here’s a general breakdown:

  • 250W: Ideal for flat terrain and low-speed assistance (often the limit in Europe).
  • 350W: Offers a good balance of power and efficiency for moderate hills and commuting.
  • 500W: Provides significant power for tackling steeper hills and longer rides.
  • 750W & 1000W: These higher wattages are generally unregulated in some regions but may not comply with e-bike laws in your area. They offer significant power for challenging terrain but can drain the battery faster.

What is torque sensing vs. cadence sensing?

Torque sensing provides assistance based on pedal pressure, offering a more intuitive and natural riding experience. Cadence sensing provides assistance based on pedaling speed, which can be less intuitive for some riders.

Battery Selection

What battery capacity (Ah) do I need?

Battery capacity (Amp hours) affects your range on a single charge. Consider your typical riding distance when choosing a battery.

What type of battery is best for me?

Lithium-ion batteries are the most common type for e-bikes due to their lightweight design and long lifespan.

How long will my battery last on a single charge?

Battery range depends on various factors like motor power, battery capacity, terrain, and rider weight. Manufacturers typically provide estimated ranges, but real-world mileage may vary.

How do I charge the battery?

Most e-bike conversion kit batteries come with dedicated chargers that plug into a standard wall outlet. Some batteries are removable for charging indoors, while others are integrated into the frame.


Will a conversion kit work with my bike?

Compatibility depends on your bike frame’s bottom bracket type (threaded vs. press-fit) and width, as well as other factors. Check the kit specifications and your bike’s measurements before purchasing.

What if my bike has a non-standard bottom bracket?

Some kits offer adapter kits for non-standard bottom brackets. Consult the kit manufacturer or a bike mechanic for compatibility information.

Installation and Maintenance

Can I install an e-bike conversion kit myself?

As mentioned earlier, the installation difficulty varies. If you’re not comfortable with mechanical work, consider hiring a bike mechanic for installation.

Where can I find installation instructions?

Most reputable e-bike conversion kit companies provide detailed installation manuals and video tutorials.

How do I maintain my e-bike conversion kit?

Regular maintenance includes checking the chain tension, tire pressure, brakes, and electrical connections. Refer to your kit’s manual for specific maintenance instructions.

Popular E-Bike Conversion Kit Brands and Models

Here’s a closer look at some of the most popular e-bike conversion kit brands and their notable models:

Bafang: A leading manufacturer known for reliable and powerful motors.

  • Bafang BBS01 & BBS02: These mid-drive motors offer good value for the price, with 250W, 350W, or 500W options (depending on regulations).
  • Bafang BBSHD: A high-performance mid-drive motor with 1000W of power, ideal for challenging terrain (check regulations in your area).

Tongsheng (TSDZ series): Affordable and decent power output mid-drive motors.

  • Tongsheng TSDZ2 & TSDZ2b: Popular options offering 250W or 350W with torque sensing for a natural riding experience.
  • Tongsheng TSDZ8: A more powerful mid-drive motor with 750W (check regulations).

Pendix eDrive series: European brand known for high-quality and powerful mid-drive motors.

  • Pendix eDrive 300 & 500: These mid-drive motors come in 250W and 350W options, known for their smooth operation and integration.

Swytch Bike: Specializes in user-friendly and lightweight front hub motor kits.

  • Swytch Air & Swytch Max: These 250W front hub motor kits are known for their ease of installation and portability.

Bosch: Premium mid-drives known for smooth performance (Bosch Performance Line CX).

Shimano: Premium mid-drives known for quiet operation and reliability (Shimano Steps E8000).

Remember: When choosing a motor, consider your riding style, terrain, and local e-bike regulations regarding wattage and speed limits.

Note: Bosch and Shimano conversion kits are typically not available for separate purchase as readily as Bafang and Tongsheng. These brands often supply motors to major e-bike manufacturers for complete e-bikes. However, some retailers may offer Bosch or Shimano conversion kits, so it’s worth checking with e-bike specialty stores.

Additional Considerations

Where can I buy an e-bike conversion kit?

E-bike conversion kits can be purchased online from dedicated e-bike retailers or general online retailers.

What is the warranty on an e-bike conversion kit?

Warranties vary by manufacturer. Check the kit specifications or contact the seller for warranty information.

What safety precautions should I take when riding an e-bike?

Always wear a helmet and follow the rules of the road. Be aware of your surroundings and adjust your speed according to conditions. Some e-bikes may require additional safety features depending on your local regulations.

I hope this FAQ has been helpful! With careful planning and research, you can convert your bike into a fun and efficient electric ride.