1. Important Safety Information
Please read this manual carefully before operating your CMACEWHEEL RX20 electric bicycle. Failure to follow instructions and safety warnings may result in serious injury or damage to the product.
- Always wear a helmet and appropriate safety gear when riding.
- Comply with all local traffic laws and regulations.
- Do not operate the e-bike under the influence of alcohol or drugs.
- Be aware of your surroundings and ride defensively.
- Regularly inspect your e-bike for proper function before each ride.
- Disclaimer: ⚠️Please mind potential fire risk and strictly follow the instruction manual for charging and storage. While using the product, please wear protective equipment and fully comply with the applicable law and regulations.
2. Product Overview
The CMACEWHEEL RX20 is a foldable electric bicycle designed for versatile riding. It features a powerful 750W motor, a 48V 15Ah/17Ah battery, and 20*4.0 inch fat tires for various terrains.
3. Setup and Assembly
3.1 Unboxing
Your e-bike comes partially assembled in a package measuring approximately 98cm x 44cm x 83cm. Carefully remove all packaging materials and inspect for any damage during transit.
3.2 Unfolding the E-bike
- Carefully lift the folded bicycle from its packaging.
- Locate the main frame hinge and release the locking mechanism.
- Unfold the frame until it clicks securely into place. Ensure the locking mechanism is fully engaged.
- Adjust the handlebar stem to the upright position and secure its locking mechanism.
- Adjust the seat post to your desired height and tighten the quick-release lever.
- Unfold the pedals.
3.3 Battery Installation and Initial Charge
The RX20 comes with a 48V 15Ah or 17Ah lithium battery. For optimal performance and longevity, fully charge the battery before its first use.
- Installation: Insert the battery into the frame compartment. Use the provided key to lock the battery securely in place.
- Charging: Connect the European standard round plug charger (100-240V, 2A) to the charging port on the battery or frame, then plug it into a power outlet. The charging indicator will show the charging status.
- Removal: Unlock the battery with the key and carefully slide it out for external charging or storage.
4. Operating Instructions
4.1 King-meter Instrument Display
The King-meter intelligent LCD display provides essential riding data.
1. Headlight | 2. Booster to walk | 3. Gear display | 4. Fault display | 5. Power display | 6. Speed mode | 7. Mileage mode
4.2 Handlebar Controls
Familiarize yourself with the controls on both handlebars for safe operation.
Includes: Brake, Headlight switch, Downshift, Upshift, Switch key, Left/right steering tail light, Horn, Switch display mode.
Includes: Right brake handle, Mechanical transmission, Throttle acceleration.
4.3 Riding Modes
The RX20 offers three riding modes:
- Electric-only mode: Use the throttle for full electric propulsion without pedaling.
- Cycling mode (without electric): Ride as a traditional bicycle, using pedal power only.
- Assistant mode: The motor provides assistance as you pedal, making riding easier, especially on inclines. Adjust assistance levels using the display controls.
4.4 Headlights and Taillights
Ensure visibility with the integrated lighting system.
- Turn on the headlight using the headlight switch on the left handlebar.
- The taillight highlights when braking.
- Pressing the left and right steering buttons will cause the tail lights to flash, signaling turns to vehicles and pedestrians behind you.
5. Maintenance
5.1 Battery Care
- Charging: Always use the original charger. Do not overcharge or completely drain the battery.
- Storage: Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, charge it to about 50-70% every 1-2 months.
- Avoid exposing the battery to water or moisture.
5.2 Tire Maintenance
The RX20 uses CST 20*4.0 fat tires.
- Regularly check tire pressure before each ride. Maintain pressure within the recommended range printed on the tire sidewall.
- Inspect tires for wear, cuts, or punctures.
5.3 Brake System
The e-bike is equipped with disc brakes.
- Check brake levers for proper tension and responsiveness.
- Inspect brake pads for wear and replace them if necessary.
- Ensure brake rotors are clean and free from oil or grease.
5.4 General Cleaning
- Clean the e-bike with a damp cloth and mild soap. Avoid high-pressure washing, especially near electrical components.
- Lubricate the chain regularly to ensure smooth operation and prevent rust.
6. Troubleshooting
If you encounter issues, refer to this section. The King-meter display can show an 'ERROR' message (Figure 4.2, item 4) indicating a fault.
| Problem | Possible Cause | Solution |
|---|---|---|
| E-bike does not power on | Battery not charged or not properly installed; Loose connections | Check battery charge level and ensure it's securely locked. Inspect all cable connections. |
| Motor not assisting | Assistant mode not selected; Low battery; Sensor issue | Ensure assistant mode is active on the display. Check battery level. If issue persists, contact support. |
| Brakes feel weak | Worn brake pads; Cable tension; Contaminated rotors | Inspect brake pads and replace if worn. Adjust brake cable tension. Clean rotors with disc brake cleaner. |
| Display shows 'ERROR' | System fault detected | Note the error code (if any) and consult the full service manual or contact customer support. Try restarting the bike. |
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | RX20 |
| Brand Name | CMACEWHEEL |
| Certification | CE |
| Max Speed | 30 - 50 KM/H |
| Wattage | > 500W (750W) |
| Power Supply | Lithium Battery |
| Voltage | 48V (54V) |
| Battery Capacity | 15AH / 17AH |
| Charger Voltage | 100-240V 2A |
| Charger Plug | European standard round plug |
| Frame Material | Aluminum Alloy |
| Folded | Yes |
| Wheel Size | 20“ (CST 20*4.0 Tyre) |
| Brake Type | Disc Brake |
| Gears | Five gears |
| Gradeability | 30° |
| Net Weight (E-bike) | 37KG |
| Weight (Battery) | 4KG |
| Gross Weight | 41KG |
| Package Size | 98x44x83cm |
| Display | King-meter |
8. User Tips
- Pre-ride Check: Always perform a quick check of brakes, tire pressure, and battery level before each ride.
- Folding Practice: Practice folding and unfolding the bike a few times at home to become proficient, especially if you plan to transport it frequently.
- Battery Range: The actual battery range can vary significantly based on terrain, rider weight, assistance level, and weather conditions. Plan your rides accordingly.
- Gear Shifting: Shift gears smoothly and avoid shifting under heavy load to prolong the life of the drivetrain.
- Visibility: Even with integrated lights, consider wearing reflective clothing, especially when riding at dawn, dusk, or night.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to your purchase documentation or contact the seller directly. Keep your proof of purchase for any warranty claims.
Security & Privacy: We do not share your personal details with any third parties without your consent. We protect your privacy and keep your personal details safe and secure.
