1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Bafang Electric Bicycle Hub Motor Conversion Kit. This kit allows you to convert a standard bicycle into an electric-powered E-bike, offering enhanced riding comfort and efficiency. The Bafang hub motor is known for its stable drive system and high quality, compatible with both disc and V brakes.
The kit is designed for various wheel sizes including 20", 24", 26", 27.5", and 700C (28"), and is available in 36V/48V with power options of 250W, 350W, or 500W. It is suitable for touring bikes, commuter bikes and mountain bikes.
2. Safety Information
⚠️ Important Safety Notice:
- Always wear a helmet and appropriate safety gear when riding an e-bike.
- Ensure all components are securely installed and tightened before each ride.
- Regularly inspect your e-bike for any signs of wear or damage, especially to the motor, wiring, and brakes.
- Be aware of your surroundings and obey all local traffic laws and regulations.
- If your kit includes a battery (not part of this motor-only kit), strictly follow the instruction manual for charging and storage to prevent potential fire risks.
- Do not modify the motor or any electrical components of the kit, as this may void the warranty and create safety hazards.
3. Specifications
| Feature | Description |
|---|---|
| Product Name | Bafang Motor Wheel |
| Motor Type | Brushless Gear Hub Motor |
| Design | Brushless |
| Installation Position | Front/Rear Motor |
| Voltage | 36V / 48V |
| Wattage | 250W / 350W / 500W (201 - 300W range) |
| Max Speed | 25-40 km/h |
| Efficiency | ≥ 80% |
| Motor Wheel Size Compatibility | 20", 24", 26", 27.5", 700C (28") |
| Brake Compatibility | Disc brake and V brake |
| Certification | CE |
| Origin | Mainland China |
4. Packing List
Upon receiving your Bafang Hub Motor Conversion Kit, please verify that all components are present and undamaged:
- Bafang Hub Motor (Note: Rim and spokes are not included and must be sourced separately or built into your existing wheel).
- Motor extension line.
- Bafang authorization certificates.
- Necessary nuts and washers for installation (as shown in unboxing video).
Video: Unboxing and inspection of the Bafang Hub Motor, showing included components and motor details.
5. Installation Guide
Before beginning installation, ensure your bicycle is compatible with the Bafang hub motor. This motor is compatible with both disc brakes and V brakes.
5.1 Compatibility Check
- Front Motor Installation: The standard installation width (Old Hub Spacing - O.L.D.) for the front motor is 100mm-105mm. Please measure the length of your bicycle's front fork dropout.
- Rear Motor Installation: The standard installation width (O.L.D.) for the rear motor is 135mm. Please measure the length of your bicycle's rear fork dropout.
- If you are unsure about compatibility, please consult a professional bicycle mechanic or contact customer support with pictures of your bicycle's fork.
Diagram: Illustrates the required Old Hub Spacing (O.L.D.) for front (100-105mm) and rear (135mm) motor installation, and compatibility with a cassette for rear motors.
Diagram: Confirms the required O.L.D. for rear fork (135mm) and front fork (100mm), with a note for 1-3mm deviation allowance.
5.2 Motor Types and Features
Image: Front Hub Motor, Brushless and Geared.
Image: Bafang Hub Motor, suitable for both disc brake and V brake systems.
The Bafang hub motors are designed to be waterproof and durable. Ensure proper sealing of all connections during installation.
Image: Demonstrates the waterproof connection and highlights the front fork length requirement of 100-105mm.
For detailed wiring and assembly instructions, please refer to the specific controller and display manual that accompanies your full conversion kit. This manual focuses on the motor unit itself.
6. Operation
Once the Bafang hub motor is correctly installed as part of a complete e-bike conversion kit (including battery, controller, and display), its operation will be managed through the e-bike's control system. Typically, this involves:
- Power On/Off: Activating the e-bike system via the display unit.
- Pedal Assist System (PAS): The motor provides assistance based on your pedaling input, with various levels of assistance selectable via the display.
- Throttle (if installed): Some kits include a throttle for on-demand power without pedaling.
- Monitoring: The display will show speed, battery level, assist level, and other relevant information.
Always refer to the specific user manual for your e-bike's controller and display for detailed operational instructions and safety guidelines.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your Bafang hub motor. While the motor itself is largely maintenance-free due to its sealed design, regular checks are recommended:
- Regular Cleaning: Keep the motor and surrounding areas clean from dirt, mud, and debris. Use a damp cloth; avoid high-pressure washing directly on the motor or electrical connections.
- Cable Inspection: Periodically check all motor cables and connectors for any signs of wear, fraying, or damage. Ensure connections are secure and free from corrosion.
- Axle Nuts: Verify that the axle nuts securing the motor to the fork are tight before each ride.
- Spoke Tension: If the motor is laced into a wheel, regularly check spoke tension to ensure the wheel remains true and strong.
- Water Exposure: Although the motor is waterproof, avoid submerging it in water for extended periods. If it gets wet, allow it to dry thoroughly before use.
8. Troubleshooting
If you encounter issues with your Bafang hub motor, consider the following common troubleshooting steps:
- Motor Not Engaging:
- Check if the e-bike system is powered on.
- Ensure all electrical connections (motor to controller, battery to controller) are secure.
- Verify the battery has sufficient charge.
- Check the display for any error codes and consult your controller/display manual.
- Loss of Power/Intermittent Power:
- Inspect all wiring for loose connections or damage.
- Check the battery connection and charge level.
- Ensure the pedal assist sensor (PAS) is clean and correctly positioned if using PAS.
- Unusual Noises from Motor:
- Stop riding immediately.
- Check for any foreign objects lodged near the motor or spokes.
- If the noise persists, it may indicate an internal issue. Contact support.
For complex issues or if troubleshooting steps do not resolve the problem, it is recommended to seek assistance from a qualified e-bike technician or contact Bafang customer support.
9. User Tips
- When installing the motor, pay close attention to the fork dropout dimensions (100-105mm for front, 135mm for rear) to ensure a proper fit.
- The motor is compatible with both disc and V brakes, offering flexibility for various bicycle types.
- Always ensure the motor's QR code is accessible after installation, as it can be scanned to retrieve specific motor information.
10. Warranty and Support
Each Bafang kit package includes a Bafang authorization certificate. This certificate supports inspection at Bafang business points.
We guarantee dual security from Bafang and our store for this kit. If you have any questions or require assistance, please feel free to contact us at any time. We are committed to providing solutions for any problems you may encounter with your order.
Image: Example of a Bafang authorization certificate, confirming product authenticity.
Image: Close-up of Bafang motors showing branding, QC stickers, and QR codes for product information and inspection.
