1. Product Overview
The Bafang M215 Series electric bike conversion kit is designed to transform standard bicycles and tricycles into convenient eRoad, eMTB, eTour, and eCity bikes. This kit features a powerful and efficient mid-drive motor, offering a seamless and enjoyable electric cycling experience. Bafang products are known for their high quality, flexibility, and reliability.
Image: Bafang M215 Series Mid Drive Motor highlighting key specifications.
2. Safety Information
Please read and understand all safety warnings and instructions before installing and operating your Bafang electric bike conversion kit. Failure to follow these instructions may result in serious injury or property damage.
- Always wear a helmet and appropriate safety gear when riding your e-bike.
- Ensure all connections are secure and waterproof before riding, especially in wet conditions.
- Do not modify the motor or battery system. Unauthorized modifications can lead to malfunction, fire, or injury.
- Keep the battery away from heat sources, direct sunlight, and flammable materials.
- Do not immerse the battery or motor in water.
- Use only the charger provided with the kit.
- Regularly inspect your e-bike for any signs of wear, damage, or loose components.
- Be aware of your surroundings and ride responsibly, adhering to all local traffic laws and regulations.
3. Package Contents
Your Bafang M215 Series Electric Bike Conversion Kit typically includes the following components:
- 1 x 48V 250W Mid Drive Motor (with integrated controller)
- 1 Pair x Brake Levers or Brake Sensors (depending on selection)
- 1 Pair x Cranks
- 1 Pair x Chainwheel (Default 44T; 36T/46T/48T/52T options available)
- 1 Set x Thumb Throttle
- 1 Set x Speed Sensor
- 1 x Display (Optional, various models available)
- 1 x 4-in-1 EB-BUS Cable
- 1 x Set of Installation Accessories (including wrench and crank removal tool)
- 1 x Battery (Optional, various capacities available)
- 1 x Charger (Optional, US/EU/AU/UK options available)
Image: Visual representation of the kit components.
4. Specifications
4.1 Motor Specifications
| Feature | Specification |
|---|---|
| Motor Model | BBS01B |
| BAFANG Model | MM G340.250 |
| Power | 250W |
| Voltage | 48V |
| Controller Current | 48V12A |
| Efficiency | > 80% |
| Max Torque | 80 N.m |
| Waterproof Grade | IPX5 |
| No Load Speed (RPM) | 83-87 |
| Load Speed (RPM) | 78-83 |
| PAS Sensor | Speed Sensor |
| Reduction Ratio | 1:21.9 |
| Net Motor Weight | About 3.8 kg |
| Motor Operation Temperature | -20°C ~ 45°C |
4.2 Battery Specifications (Optional)
Image: Detailed specifications for various battery options.
Available battery types include Downtube Hailong 1-2, Downtube Hailong Max, and Downtube Yingwu, with capacities ranging from 13Ah to 20Ah (48V) and a 52V 19.2Ah option. All batteries feature a 30A BMS for comprehensive protection.
4.3 Display Specifications (Optional)
Image: Detailed specifications for various display models.
Various display models are available, including DZ40 Mini, P860ML, 500C, EKD01 Bluetooth, BAFANG DPC18, SW2-M58, and 800S. Features vary by model, including PAS levels, screen size, headlight indicators, applicable voltage, and USB charging capabilities.
4.4 Chainring Specifications
Image: Table detailing chainring sizes, materials, weights, diameters, offsets, and recommended rear sprockets.
5. Setup & Installation
5.1 Compatibility Check
The BAFANG BBS01B mid-drive kit is compatible with bicycles featuring a bottom bracket length of 68-73mm and an internal diameter of 34-36mm (JIS standard). It is NOT recommended for bikes with carbon fiber frames or coaster brakes.
Image: Guide on measuring your bike's bottom bracket for compatibility.
For 73mm bottom brackets, extra gaskets and longer screws may be required. For 90-100mm or 110-120mm bottom brackets, specific gaskets are needed. Please ensure your bike's inner diameter is not less than 33.5mm.
5.2 Chainring Selection
When converting to an e-bike, the chainring size's impact on speed is less significant due to motor power. A larger chainring generally results in higher top speeds. Ensure the chosen chainring is compatible with your bike's existing gear system (typically ≤9 speed).
5.3 Wiring Diagram
Follow the wiring diagram carefully to ensure proper connection of all components. The kit includes a 4-in-1 EB-BUS cable for simplified wiring.
Image: Comprehensive wiring diagram for the Bafang mid-drive motor kit, showing connections for motor, battery, display, throttle, speed sensor, and brake system.
5.4 Brake System Options
The kit offers two brake system options: traditional brake levers or brake sensors. If your bike uses hydraulic brakes, you will need to use the brake sensors. If you prefer brake sensors, please contact the seller as brake levers are the default inclusion.
Image: Visual comparison of Bafang Electric Bicycle Brake Levers and Electric Bicycle Brake Sensors.
6. Operation
6.1 Riding Modes
Your Bafang e-bike conversion kit supports three primary riding modes:
- Electric Bike (Thumb Throttle Mode): Provides power directly via the thumb throttle, allowing you to ride without pedaling.
- Pedal Assist (PAS) Mode: The motor provides assistance as you pedal, making cycling easier and extending your range. The level of assistance can be adjusted via the display.
- Normal Bike Mode: The motor is disengaged, and the bike functions as a traditional bicycle, relying solely on pedal power.
6.2 Display Functions
The optional display provides crucial riding data and allows you to control various settings. Bafang displays are designed for legibility and durability, being water and dirt resistant.
Image: Examples of different Bafang computer display options (EKD01, TOUCH T1, P860C, DPC18, etc.).
Common display features include speed, distance, battery level, PAS level, and error codes. Some models offer Bluetooth connectivity and USB charging ports.
7. Maintenance
7.1 Battery Care
Proper battery care is essential for longevity and performance:
- Charge the battery regularly, even when not in use, to maintain its health.
- Avoid fully discharging the battery frequently.
- Store the battery in a cool, dry place, away from extreme temperatures.
- Use only the original Bafang charger.
- The battery's BMS (Battery Management System) provides protection against overcharge, over-discharge, over-voltage, over-current, short circuit, and temperature fluctuations.
Image: Diagram illustrating the smart 30A BMS and its protection features.
7.2 General Motor and Component Care
- Keep the motor and other components clean from dirt and debris.
- Regularly check all bolts and connections for tightness.
- Lubricate the chain and other moving parts as needed.
- Inspect wiring for any signs of wear or damage.
- If you notice any unusual noises or performance issues, consult a qualified technician.
8. Troubleshooting
This section addresses common issues you might encounter with your Bafang e-bike kit. For more complex problems, please contact customer support.
- No Power/Motor Not Engaging:
- Check battery connection and ensure it's fully charged.
- Verify all motor and display cables are securely connected according to the wiring diagram.
- Ensure the display is turned on and showing no error codes.
- Inconsistent Pedal Assist:
- Check the speed sensor and magnet alignment. Ensure the magnet passes closely by the sensor.
- Verify the PAS level setting on your display.
- Brakes Not Cutting Power:
- Ensure brake levers or sensors are correctly installed and connected.
- Check for any obstructions preventing the brake sensor from activating.
- Display Not Turning On:
- Check battery charge and connection.
- Inspect the display cable for damage.
9. User Tips
- Double-Check Compatibility: Before purchasing, carefully measure your bike's bottom bracket to ensure it falls within the 68-73mm length and 34-36mm internal diameter range. This is crucial for a smooth installation.
- Consider Battery Capacity: Choose a battery capacity (e.g., 13Ah, 17.5Ah, 20Ah) that matches your expected range and usage. Higher Ah ratings provide longer range.
- Professional Installation: While a manual is provided, if you are unsure about any step of the installation process, consider seeking assistance from a professional bike mechanic or e-bike specialist.
10. Warranty & Support
Bafang provides the following warranty coverage for your electric bike conversion kit:
- Electric Bike (Complete): 2 Years quality warranty, excluding physical damage and incorrect operation.
- Motor Series & Battery: 12 months quality warranty, excluding physical damage and incorrect operation.
- Accessories: 30 days quality warranty, excluding physical damage and incorrect operation.
For any support inquiries, technical assistance, or warranty claims, please contact the seller or authorized Bafang service center. Provide your product model and purchase details for faster service.
