1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Varstrom 36V 250W E-Bike Conversion Kit. This kit is designed to transform a standard bicycle into an electric bicycle, offering reliable electric assistance for daily commutes and leisure rides. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
Key Features:
- Reliable 36V 250W Rear Hub Motor: Features a VSR04 geared brushless rear hub motor, providing a maximum torque of 30N.m for smooth and efficient assistance.
- EU Compliant Speed: Maximum speed of 25km/h (15.5mph), adhering to European regulations for legal road use.
- Quiet and Efficient Operation: Motor operates silently below 55dB with over 75% efficiency.
- Wide Compatibility: Supports 26", 27.5", 28", 29" wheels and 700C rims. Compatible with disc brakes and various tire widths.
- Smart Controller: 36V 250W controller with 14A maximum output current and low voltage protection. IP-X5 waterproof rating.
- Complete DIY Kit: Includes all necessary components for conversion, except the battery.
- SW2-M58 Display: 3.8" LCD screen with multiple assist levels and customizable settings.
Package Contents:
The Varstrom 36V 250W E-Bike Conversion Kit includes the following components:
- Rear Hub Motor Wheel (with rim and spokes)
- SW2-M58 Display
- Controller with protective box
- Brake Levers
- Thumb Throttle
- PAS Sensor
- 1T4 Cable
- Motor Extension Cable
Note: Battery is not included in this kit. Ensure you have a 36V battery with an XT60 (female) connector and a BMS rating above 30A.
Image 1.1: Overview of the Varstrom 36V 250W Rear Hub Motor Kit, highlighting key features like rated voltage, max power, torque, and waterproof grade.
Image 1.2: Visual representation of a bicycle before and after conversion with the Varstrom E-Bike Hub Motor Kit.
2. Safety Information
Your safety is paramount. Please observe the following safety guidelines:
- Always wear a helmet and appropriate safety gear when riding your e-bike.
- Ensure all components are securely installed and tightened before each ride.
- Regularly check brake functionality.
- Do not operate the e-bike in conditions beyond its IP-X5 waterproof rating (e.g., submerging in water).
- Keep hands and clothing clear of moving parts, especially the motor and spokes.
- Do not modify the motor or controller settings beyond recommended parameters.
- Always disconnect the battery before performing any maintenance or installation work.
- Be aware of local regulations regarding e-bike usage, speed limits, and power output.
3. Setup and Installation
This section guides you through the installation of the Varstrom E-Bike Conversion Kit. Professional installation is recommended if you are unfamiliar with bicycle mechanics or electrical systems.
3.1 Compatibility Check:
Before starting, verify your bicycle's compatibility:
- Wheel Size: This kit is for 26-inch wheels. Ensure your bicycle frame can accommodate a 26-inch rear wheel.
- Rear Dropout Width: Your bicycle's rear dropout (fork width) must be between 136-142mm.
- Brake Type: Compatible with disc brakes.
- Tire Width: Supports tire widths of 1.5"-2.4" for 26" wheels.
- Freewheel: Compatible with 9-speed or lower freewheels (freewheel not included).
Image 3.1: Compatibility chart showing supported wheel sizes, rim diameters, spokes, brake types, tire widths, freewheel compatibility, and rear dropout size (136-142mm).
3.2 Installation Steps (General Overview):
- Prepare the Bicycle: Remove the existing rear wheel and freewheel from your bicycle.
- Install Freewheel: Install your 9-speed or lower freewheel onto the new motor wheel.
- Mount Motor Wheel: Install the motor wheel into the rear dropout, ensuring it is centered and securely tightened.
- Mount Controller: Secure the controller with its protective box to a suitable location on the bicycle frame, typically near the seat post or down tube.
- Install Brake Levers: Replace your existing brake levers with the provided e-bike brake levers.
- Install Thumb Throttle: Mount the thumb throttle on the handlebar.
- Install PAS Sensor: Install the Pedal Assist Sensor (PAS) on the crank arm, ensuring proper alignment.
- Connect Wiring: Follow the wiring diagram to connect all components. Use the 1T4 cable for main connections and the motor extension cable as needed.
- Connect Battery: Connect your 36V battery (not included) to the controller using the XT60 connectors.
Image 3.2: Detailed wiring diagram illustrating the connections between the hub motor, controller, display, brake levers, thumb throttle, PAS sensor, and battery.
4. Operating Instructions
Once installed, operating your Varstrom e-bike kit is straightforward. The SW2-M58 display provides control and information.
4.1 SW2-M58 Display Operation:
The SW2-M58 display is your interface for controlling the e-bike system.
Image 4.1: Specifications and physical dimensions of the SW2-M58 LCD display, including screen size, operating voltages, assist levels, and handlebar mounting details.
- Screen: 3.8" LCD.
- Operating Voltages: Compatible with 24V/36V/48V/52V systems.
- Assist Levels: Offers 3, 5, or 9 levels of pedal assist, configurable via settings.
- Unit of Speed: Displays speed in KMH or MPH.
- Power-on Password: Default is 0000.
- Advanced Settings Password: Default is 1919.
- Language: English.
Refer to the display's specific manual for detailed instructions on navigating menus, changing settings, and understanding error codes.
4.2 Riding Modes:
- Pedal Assist System (PAS): When pedaling, the PAS sensor detects your pedaling motion and provides motor assistance based on the selected assist level.
- Thumb Throttle: The thumb throttle provides on-demand power, allowing you to accelerate without pedaling. Use it cautiously, especially at higher assist levels.
5. Maintenance
Regular maintenance ensures the longevity and safe operation of your e-bike conversion kit.
- General Cleaning: Keep the motor, controller, and display clean. Use a damp cloth; avoid high-pressure washing directly on electrical components.
- Cable Inspection: Periodically check all cables and connectors for wear, damage, or loose connections.
- Motor Inspection: Ensure the motor wheel is securely fastened. Listen for unusual noises during operation.
- Brake Check: Regularly inspect brake pads and cables for wear and proper function. Adjust as necessary.
- Tire Pressure: Maintain correct tire pressure for optimal performance and safety.
- Battery Care (General): Although not included, if using a 36V battery, follow the battery manufacturer's charging and storage guidelines. Avoid fully discharging the battery and store it in a cool, dry place.
6. Troubleshooting
This section addresses common issues you might encounter.
Common Issues and Solutions:
- No Power to Display/Motor:
- Check battery connection and ensure the battery is charged.
- Verify all cable connections, especially the 1T4 cable and motor extension cable.
- Ensure the display is properly seated and powered on.
- Motor Not Assisting:
- Check if the PAS sensor is correctly installed and aligned.
- Ensure the selected assist level on the display is not set to zero.
- If using the throttle, ensure it is connected and functioning.
- Error Code 'err 07' on Display:
- This code typically indicates a motor malfunction.
- Check motor cable connections for any damage or disconnections.
- If the issue persists, contact Varstrom customer support.
- Intermittent Power:
- Inspect all wiring for loose connections or frayed cables.
- Ensure the battery is securely mounted and its connections are stable.
FAQ from Product Description:
Q1: Is this rear motor kit compatible with my bicycle?
A1: This rear motor kit is compatible with most standard bicycles. Check the rear fork width (dropout size), wheel size, and brake type before purchasing to ensure compatibility. This specific kit is for 26-inch wheels and 136-142mm dropouts.
Q2: What battery connector is compatible with this motor?
A2: The battery connector for this e-bike conversion kit is XT60 (male), so your battery must have an XT60 (female) connector for proper connection.
7. Specifications
Detailed technical specifications for the Varstrom 36V 250W E-Bike Conversion Kit.
Image 7.1: Comprehensive table detailing the motor model, rated voltage, power, torque, speed, efficiency, noise level, operating temperature, waterproof grade, controller current limit, low voltage protection, and brake type.
| Feature | Specification |
|---|---|
| Motor Model | VSR04 (Freewheel Style Rear Hub Motor) |
| Rated Voltage | 36V |
| Rated Power | 250W |
| Maximum Torque | 30N.m |
| Maximum Speed | 25km/h (15.5mph) |
| Rated Efficiency | >75% |
| Noise Level | <55 dB |
| Operating Temperature | -20°C to 45°C |
| Waterproof Grade | IP-X5 |
| Brake Type Compatibility | Disc Brake |
| Compatible Freewheel Speeds | 9 speed or below freewheel |
| Rear Dropout Compatibility | 136-142mm |
| Connector Type | G9.1 |
| Feature | Specification |
|---|---|
| Maximum Output Current | 14A |
| Low Voltage Protection | 29±1V |
| Feature | Specification |
|---|---|
| Screen Type | 3.8" LCD |
| Operating Voltages | 24V/36V/48V/52V |
| Assist Levels | 3, 5, 9 (Configurable) |
| Unit of Speed | KMH/MPH |
| Power-on Password | 0000 (Default) |
| Advanced Settings Password | 1919 (Default) |
| Language | English |
8. Warranty and Support
For warranty information and customer support, please refer to the seller or manufacturer's official channels.
- Warranty: Specific warranty terms and conditions are provided by the seller at the time of purchase. Please retain your proof of purchase.
- Technical Support: If you encounter issues not covered in this manual or require further assistance, please contact Varstrom customer support through their official website or the platform where the product was purchased.
