Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Varstrom 48V 1500W E-Bike Conversion Kit. This kit is designed to transform a standard bicycle into a powerful electric bicycle, featuring a brushless rear hub motor and a VD18MT Touch Display for intuitive control. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Image: The Varstrom 48V 1500W E-Bike Conversion Kit, showcasing the rear hub motor and its application on a mountain bike.
What's in the Box
Your Varstrom E-Bike Conversion Kit includes the following components:
- 1500W Rear Hub Motor (pre-laced into rim)
- Controller and Controller Box
- LCD Display (VD18MT Touch Display)
- Brake Levers (or Brake Sensors, depending on selection)
- Thumb Throttle
- PAS Sensor (Pedal Assist Sensor)
- Headlight
- 1T4 Cable (main wiring harness)
- User Manual
Note: A 48V/52V battery is required and sold separately. The kit does not include a battery.
Image: A visual representation of all components included in the Varstrom E-Bike Conversion Kit package.
Specifications
| Feature | Specification |
|---|---|
| Product Name | E-bike Rear Hub Motor Conversion Kit |
| Model | JYLT 1500W RDC |
| Rated Voltage | 48V |
| Rated Power | 1500W |
| Max Torque | 78 N·m |
| Max Load Speed (26") | 70 km/h (≈43 mph) |
| Noise Level | <55 dB |
| No-load Current | ≤1A |
| Rated Current | ≤32A |
| Controller Rated Voltage | 48V |
| Controller Rated Current | 18A |
| Controller Max Current | 35A |
| Low Voltage Protection | 39±1V |
| Overvoltage Protection | 62.4V |
| Wheel Size Compatibility | 26" / 27.5" / 28" / 29" / 700C |
| Spokes | 36H*12G |
| Sprocket Type | Cassette (compatible with 10 speeds or less) |
| Motor Type | Brushless, Gearless Hub Motor |
| Rated Efficiency | >82% |
| Motor Protection Rating | IPX5 |
| Motor Flange Width | 142 mm |
| Frame Dropout Compatibility | 138–146 mm |
| Display Type | VD18MT Touch Display (1.45" IPS Screen) |
| Brake Style Compatibility | Disc Brake Only |
| Material | Aluminum (wheel) |
| Assembly Required | Yes |
Setup and Installation
Compatibility Requirements
Before beginning installation, ensure your bicycle meets the following requirements:
- Brake System: Your bicycle must have disc brakes. This kit is not compatible with V-brakes or rim brakes.
- Rear Dropout: The rear dropout width of your frame must be between 138mm and 146mm. The motor axle is 142mm.
- Cassette: Compatible with cassettes of 10 speeds or less. Not compatible with freewheels.
- Frame Material: Designed for aluminum or steel frames. Not compatible with carbon fiber frames.
Choosing the Correct Wheel Size
The kit is compatible with various wheel sizes. Ensure you have selected the correct wheel size for your bicycle. Refer to your tire sidewall for your current wheel and tire dimensions.
Image: Guide on selecting the appropriate wheel size and measuring the rear dropout for installation.
Installation Flow
Follow these general steps for installing the hub motor:
- Check Fork Width: Verify the width of your rear fork dropout.
- Select Spacer Setup: Determine if spacers are needed based on your dropout width. For JYLT 1000W/1500W models, two spacers may be required inside the bicycle freewheel.
- Mount Motor & Torque Arm: Securely install the hub motor into the rear dropout and attach the torque arm.
- Connect Wiring & Finalize: Connect all electrical components according to the wiring diagram and secure all connections.
Image: Detailed installation flow for securing the hub motor to your bike frame, including scenarios for different fork widths.
Component Overview and Wiring
Familiarize yourself with the kit components and their connections. The 1T4 cable simplifies wiring by integrating multiple connections into one main harness.
Image: An overview of the hub motor kit components and their wiring connections for a complete setup.
Operating Instructions
VD18MT Touch Display
The VD18MT Touch Display provides intelligent control and monitoring for your e-bike. It features a 1.45" IPS screen for clear visibility and easy navigation. Use the touch screen and lever-type button for adjusting settings and viewing ride data. Connect to the "I-Bike" app for further customization.
Image: The VD18MT Touch Display, highlighting its features and smartphone app connectivity.
Riding Modes
Your e-bike conversion kit supports multiple riding modes to suit various preferences and conditions:
- Pedal Assisted Mode (PAS): Provides intelligent motor support as you pedal. Ideal for extending range and assisting on inclines.
- Throttle Electric Mode: Delivers full electric power on demand via the thumb throttle, allowing for riding without pedaling. Useful for quick acceleration or when tired.
- Manual Mode: Ride using only your own power, with the motor disengaged and battery off. Experience traditional cycling.
- Walk Assisted Mode: Hold the lower button to activate a steady 6 km/h (3.7 mph) walk assist. This feature helps when pushing the e-bike up slopes or through crowded areas.
Image: Explanation of the four distinct riding modes offered by the Varstrom system.
Maintenance
The Varstrom E-Bike Conversion Kit is designed for durability and minimal maintenance:
- Brushless, Gearless Motor: The direct-drive design of the brushless, gearless hub motor eliminates internal friction points, leading to smooth operation, extended lifespan, and reduced maintenance compared to geared motors.
- Enhanced Protection: The motor has an IPX5 rating and features waterproof cables, ensuring reliable performance in various weather conditions. The motor wiring is protected with a spring at the exit to prevent damage and wear.
- Regular Checks: Periodically inspect all electrical connections for tightness and signs of wear. Ensure brake levers and throttle operate smoothly. Keep the display clean.
- Cleaning: Clean the motor and other components with a damp cloth. Avoid high-pressure washing directly on electrical components.
Image: An illustration of the brushless, gearless hub motor's internal structure, emphasizing its durability and quiet operation.
Troubleshooting
If you encounter issues with your e-bike conversion kit, refer to the following common troubleshooting steps:
- No Power to Display/Motor:
- Check battery connection and ensure it is fully charged.
- Verify all cable connections, especially the 1T4 cable and motor cable, are secure.
- Ensure the display is properly seated and powered on.
- Motor Not Assisting/Working:
- Check PAS sensor installation and ensure the magnet disc is correctly positioned and not obstructed.
- Verify throttle connection and function.
- Ensure brake levers are not engaged, as they may cut motor power.
- Check for any error codes on the VD18MT display and consult the display's specific manual for code interpretation.
- Inconsistent Power/Jerking:
- Inspect all wiring for damage or loose connections.
- Ensure the battery is providing stable voltage.
- Display Not Responding:
- Restart the system by turning the battery off and on.
- Check the display's cable connection to the 1T4 harness.
If problems persist after performing these checks, please contact customer support.
Warranty and Support
Product Warranty
The Varstrom E-Bike Conversion Kit comes with an 18-month manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
Customer Support
For technical assistance, warranty claims, or any questions regarding your Varstrom product, please refer to the contact information provided with your purchase or visit the official Varstrom website for support resources.