1. Introduction
Welcome to the Aairsk XT90 Electric Mountain Bike user manual. This guide provides essential information for the safe assembly, operation, and maintenance of your new e-bike. Please read this manual thoroughly before your first ride to ensure optimal performance and safety.
2. Safety Information
Your safety is paramount. Always adhere to the following guidelines:
- Always wear appropriate protective equipment, including a helmet, knee pads, and elbow pads, when riding.
- Comply with all applicable local laws and regulations regarding electric bicycles.
- Exercise caution when riding in traffic, adverse weather conditions, or on unfamiliar terrain.
- Be aware of potential fire risks associated with charging and storage of the battery. Strictly follow all instructions provided in this manual for battery handling.
- Regularly inspect your e-bike for any signs of wear, damage, or loose components before each ride.
For a comprehensive understanding of safety protocols, please refer to the official user manual PDF: Aairsk XT90 User Manual (PDF).
3. Package Contents & Assembly
Your Aairsk XT90 e-bike is shipped approximately 85% assembled. The package typically includes:
- Main e-bike frame with rear wheel, motor, and battery pre-installed
- Front wheel
- Foot pedals
- Front turn signals (if applicable)
- Front and rear mirrors (if applicable)
- Footrests (if applicable)
- Charger
- Tool kit (basic assembly tools)
- User Manual
Assembly Instructions:
Assembly typically requires two people and takes approximately 30 minutes. The main components requiring assembly are the front wheel, foot pedals, front turn signals, front and rear mirrors, and footrests.
While a dedicated assembly video for the XT90 model was mentioned, please refer to the general product overview video below for visual guidance on the bike's features, which may assist in understanding component placement. For detailed step-by-step instructions, consult the included paper manual or the PDF version linked in the Safety Information section.
4. Operation
Intelligent Display:
The e-bike features an M5 color middle display that provides real-time information about your ride. Key indicators include:
- Power Bar: Shows current power output.
- Battery Level: Indicates remaining battery charge.
- Real-time Speed: Displays your current speed.
- Speed Grade: Shows the current assist level.
- Riding Status: General operational status.
- Gear Adjustment: Indicates the selected gear.
The display also shows information related to brake levers, Shimano derailleur, headlights, and horn status.
Card Key Unlock:
To unlock your e-bike, simply tap the provided card key on the LCD display. Tap it again to lock the bike. This NFC feature provides a convenient and secure way to manage your e-bike's power.
Riding Modes:
The XT90 offers three distinct riding modes to suit various preferences and terrains:
- Pedal Assist Electric Bike Mode: Provides assistance while pedaling, with 5 adjustable assist levels.
- Pure Electric Mode: Allows for effortless cruising without pedaling, using the throttle.
- Classic Pedal Mode: Functions as a traditional bicycle, without electric assistance.
The 21-speed Shimano gear system allows for fine-tuning your ride across different inclines and speeds.
5. Charging
The Aairsk XT90 is equipped with a 48V 20Ah lithium-ion battery. To charge the battery:
- Ensure the e-bike is turned off before connecting the charger.
- Connect the charger to the charging port on the e-bike.
- Plug the charger into a standard power outlet.
- The charging indicator on the charger will show the charging status.
- A full charge typically takes 5 to 7 hours.
- Disconnect the charger once charging is complete.
The battery features BMS (Battery Management System) protection for safe and efficient charging.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your e-bike.
- Cleaning: Clean your e-bike regularly with a damp cloth. Avoid high-pressure washing directly on electrical components.
- Tires: Maintain proper tire pressure (refer to tire sidewall for recommended PSI). Inspect tires for wear and punctures. The 26 x 2.6 inch all-terrain fat tires are designed for various surfaces.
- Brakes: Regularly check the dual disc brakes for responsiveness and wear on the brake pads. Adjust or replace as necessary.
- Chain & Gears: Keep the chain clean and lubricated. Ensure the 21-speed Shimano derailleur shifts smoothly.
- Suspension: The dual full suspension system absorbs bumps. Periodically check the suspension components for proper function and adjust if needed. The suspension features a lockable mechanism for varied terrain.
- Battery Care: Store the battery in a cool, dry place. Avoid fully discharging the battery for extended periods.
7. Troubleshooting
This section provides general guidance for common issues. For more complex problems, please contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| E-bike does not power on | Battery low or disconnected; power button not pressed correctly; card key not used. | Charge battery; ensure battery is securely connected; press power button firmly; tap card key on display. |
| Motor not assisting | PAS level set to 0; Pure Electric mode not engaged; sensor issue. | Increase PAS level; engage throttle for Pure Electric mode; check sensor connections. |
| Brakes feel weak | Worn brake pads; loose brake cable; air in hydraulic system (if applicable). | Inspect and replace brake pads; adjust brake cable tension; consult a bike mechanic for hydraulic issues. |
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | XT90 |
| Brand Name | Aairsk |
| Certification | CE |
| Rated Passenger Capacity | One Seat |
| Style | Multi-use Design |
| Max Speed | 25 km/h (up to 45 km/h with speed limit removed) |
| Estimated Max Range | 70-100 km (Pure Throttle 45-60KM; Electric Power Assist 60-100KM) |
| Motor Rated Power | 250W (750W motor power mentioned in description) |
| Motor Torque | 75 N.m |
| Power Supply/Source | Lithium battery |
| Voltage | 48V |
| Battery Capacity | 20Ah |
| Motor Type | Brushless Rear Hub Motor |
| Folded | No |
| Wheel Size | 26 x 2.6 inches |
| Frame Material | Carbon Steel |
| Type | Mountain Bike |
| Braking System | Dual Disc Brake |
| Suspension Type | Dual Full Suspension |
| Gears | 21 Speed (Shimano) |
| Battery Position | Hidden battery |
| Smart Type | High Speed |
| Application | City |
| Charging Time | 5-7 hours |
| Recommended Height | 163-190 cm (64.2-74.8 inches) |
| Bicycle Weight | 27 kg (60 lbs) |
| Max Load Capacity | 150 kg (330 lbs) |
9. User Tips
- Pre-Ride Check: Always perform a quick check of brakes, tire pressure, and battery level before each ride.
- Terrain Adaptability: The 26-inch all-terrain fat tires and dual full suspension make this bike suitable for various environments, including off-road, mountain, snow, and urban roads. Adjust your riding style and speed accordingly.
- Battery Longevity: To maximize battery life, avoid storing the bike in extreme temperatures and try to keep the battery charge between 20% and 80% when not in use for extended periods.
- Security: Utilize the card key unlock feature for convenient and secure activation/deactivation of your e-bike.
10. Warranty and Support
For warranty information, technical support, or any inquiries not covered in this manual, please contact the Aairsk Ebike Store directly through your purchase platform. Keep your purchase records handy as they may be required for warranty claims.