Product Overview
The Fafrees FF20 Polar is a versatile folding electric bicycle designed for various riding environments. It features a robust dual battery system for extended range, a powerful hub motor for efficient climbing, and a high-resolution LCD display for comprehensive ride data. Its design prioritizes both performance and rider comfort, making it suitable for daily commutes and adventurous rides.

Image: The Fafrees FF20 Polar E-Bike, showcasing its compact design and included helmet.
Setup and Assembly
Your Fafrees FF20 Polar E-Bike comes partially assembled. Follow these steps for initial setup:
- Unfolding the Bike: Carefully unfold the frame and secure all quick-release levers. Ensure the handlebar stem and seat post are properly locked into position.
- Handlebar Adjustment: Adjust the handlebar height and angle for a comfortable riding position. Tighten all bolts securely.
- Seat Post Adjustment: Adjust the seat height to allow for a slight bend in your knee when the pedal is at its lowest point. Secure the quick-release lever.
- Battery Installation & Charging: The FF20 Polar features two batteries. Ensure both are securely installed. Fully charge both batteries before your first ride. Connect the charger to the charging port and a power outlet. The indicator light on the charger will change when charging is complete.
- Tire Inflation: Inflate the CHAOYANG 20x4.0 fat tires to the recommended pressure, typically found on the tire sidewall.
- Brake Check: Test both front and rear brakes to ensure they are functioning correctly and provide adequate stopping power.

Image: Detailed dimensions of the Fafrees FF20 Polar E-Bike in both folded and unfolded states, along with rider height, maximum load, and bike weight specifications.
Operating Instructions
Familiarize yourself with the operating modes and features of your e-bike:
- Power On/Off: Press and hold the power button on the LCD display to turn the bike on or off.
- LCD Display: The high-resolution LCD display provides real-time information such as speed, battery level, mileage, and current gear. It also allows you to select from 5 preset speed levels.
- Riding Modes:
- Pedal Assist Mode (PAS): The motor provides assistance as you pedal. You can adjust the level of assistance.
- Electric Mode: Use the throttle for full electric power without pedaling.
- Manpower Mode: Ride the bike like a traditional bicycle without any motor assistance.
- Dual Battery System: The FF20 Polar is equipped with two 48V 10.4Ah batteries, which can be used independently or together. A dual battery equalizer manages current flow, extending battery life and overall range up to 160 km in PAS mode.
- Braking System: The bike features efficient double disc brakes with 160mm F/L rotors and power-off brake levers, ensuring effective stopping even on loose terrain.
- Fat Tires: The CHAOYANG 20x4.0 fat tires offer increased traction, adapting to various riding conditions including snow, sand, mud, gravel, and flat roads.
- Safety Features: For night riding, the bike includes a super bright 15W front light and a 5W brake light. It also comes with rearview mirrors, an electric horn, and reflectors for enhanced visibility.

Image: Illustration of the Fafrees FF20 Polar E-Bike's dual battery system, highlighting its capacity and range capabilities.

Image: Detailed view of the Fafrees FF20 Polar E-Bike's double disc brakes and the power-off brake lever, indicating the three riding modes.

Image: A visual guide to the Fafrees FF20 Polar E-Bike's integrated safety equipment, such as the E-Mark headlight, electric horn, rearview mirrors, and various reflectors.

Image: Close-up of the CHAOYANG 20x4.0 fat tires, demonstrating their suitability for diverse terrains including snow, sand, mud, gravel, and flat surfaces.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Fafrees FF20 Polar E-Bike:
- Cleaning: Regularly clean your bike with a damp cloth. Avoid high-pressure washing directly on electrical components.
- Battery Care: Store batteries in a cool, dry place. If not used for extended periods, charge them every 1-2 months to maintain battery health. Avoid fully discharging the batteries.
- Brake Inspection: Periodically check brake pads for wear and ensure brake levers are responsive. Adjust or replace as needed.
- Tire Pressure: Check tire pressure before each ride and inflate to the recommended PSI.
- Chain Lubrication: Keep the chain clean and lubricated to ensure smooth gear changes and prevent rust.
- Fastener Check: Regularly inspect all bolts and fasteners for tightness, especially after the first few rides.
Troubleshooting
If you encounter any issues with your Fafrees FF20 Polar E-Bike, consider the following:
- Power Issues: Ensure batteries are fully charged and properly seated. Check all electrical connections for looseness.
- Motor Not Assisting: Verify that the pedal assist level is set correctly on the LCD display. Check for any error codes on the display.
- Brake Noise/Ineffectiveness: Inspect brake pads for wear. Ensure disc rotors are clean and free of oil. Adjust brake cable tension if necessary.
- Flat Tire: Inspect the tire for punctures. If found, repair or replace the inner tube. Ensure proper tire pressure after repair.
- General Problems: For more complex issues, provide a detailed description of the problem, including any photos or videos if possible. This will assist our engineers in providing an effective solution.
- Frame Number: It is highly recommended to photograph your bike's frame number upon purchase. This unique identifier is crucial for identification and recovery in case of theft. The frame number is typically located on the underside of the bike frame.
Specifications
| Feature | Specification |
|---|---|
| Brand | Fafrees |
| Model Number | Fafrees FF20 Polar |
| Bike Type | Electric Bicycle |
| Age Range | Adult |
| Color | Grey |
| Wheel Size | 20 Inches |
| Frame Material | Aluminum |
| Suspension Type | Front |
| Number of Speeds | 5 |
| Product Dimensions | 179 x 121 x 68 cm |
| Item Weight | 34 Kilograms |
| Brake Type | Disc |
| Included Components | Fafrees FF20Polar E Bike mountain bike |
Warranty and Support
Fafrees is committed to providing professional customer service. If you have any questions or require assistance with your FF20 Polar E-Bike, please do not hesitate to contact us. We aim to respond to all inquiries within 24 hours.
For support, please refer to the contact information provided at the point of purchase or on the official Fafrees website.





