Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and care of your Aairsk S800 E-Bike. Please read this manual thoroughly before your first ride and keep it for future reference. The Aairsk S800 is an adult electric mountain bike featuring a 250W brushless motor, a 36V13AH removable lithium battery, and 26-inch tires, designed for various terrains including city roads, snow roads, sand roads, and slippery roads.

Image: Overview of the Aairsk S800 E-Bike, showcasing its design and key specifications like motor power, battery voltage, and tire size.
Safety Information
⚠ 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.
Always perform a pre-ride inspection to ensure all components are in good working order. This includes checking tire pressure, brake functionality, battery charge, and ensuring all quick releases are properly secured. Wear a helmet and appropriate safety gear at all times when riding.
Product Overview
The Aairsk S800 E-Bike is engineered for versatility and comfort, offering a robust riding experience across diverse environments. Key features include:
- Powerful Motor: Equipped with a 250W brushless motor for efficient power delivery, capable of handling headwind, muddy paths, and gravel roads.
- Removable Lithium Battery: A 36V13AH lithium battery provides a range of up to 75km on a single charge, with a charging time of 5-6 hours. The removable design allows for flexible charging options.
- Advanced Suspension: Features a lockable front fork and a suspension system designed to reduce joint stress by 60% and provide an 80% smoother ride.
- 7-Speed Shimano Gearing: Professional Shimano 7-speed system adapts to various driving efficiencies and stability requirements across different road conditions.
- Safety Features: Includes LED headlights for night riding, strong reflective taillights for visibility, and front and rear dual disc brakes that automatically cut off power supply upon activation for enhanced safety.
- Smart Controls: Features a smart LCD instrument panel and a card key system for unlocking and locking the bike.
- Durable Frame: Constructed with a carbon-alloy frame that is tough and bend-resistant, designed for heavy loads and climbing, having undergone 100,000 vibration fatigue tests.

Image: Detailed diagram illustrating the internal components and power output curve of the 250W brushless motor.

Image: Illustration of the 36V13AH removable lithium battery, highlighting its capacity, range, and charging duration.

Image: Visual representation of the e-bike's suspension system, emphasizing reduced joint stress and a smoother ride, along with a detail of the lockable front fork.

Image: Detailed view of the 7-speed Shimano derailleur and shifter, illustrating the professional gearing system.

Image: A composite image showcasing the LED headlights, front and rear dual disc brakes, strong reflective taillights, and adjustable leather seat.

Image: Close-up view of the smart LCD instrument panel on the handlebar and the card key used for unlocking/locking the e-bike.

Image: Diagram highlighting the robust carbon-alloy frame, emphasizing its bend-resistant properties and suitability for heavy loads and climbing.
Specifications
| Feature | Specification |
|---|---|
| Model Number | Aairsk S800 |
| Certification | CE |
| Rated Passenger Capacity | One Seat |
| Style | Standard Type |
| Max Speed | <25km/h |
| Range per Power | 31 - 60 km (up to 75km with 36V13AH battery) |
| Wattage | 200 - 250W |
| Power Supply | Lithium Battery |
| Voltage | 36V |
| Motor Type | Brushless |
| Folded | No |
| Wheel Size | 26″ |
| Bicycle Weight | 26.6 kg (58.6 lbs) |
| Max Load Capacity | 150 kg (330 lbs) |
| Rider Height | 152-192 cm (61.5-73 inches) |
| Total Length | 168 cm (66.1 inches) |
| Handlebar Height | 160 cm (39.4 inches) |
| Wheelbase | 110 cm (43.3 inches) |
| Seat Height | 80-100 cm (31.5-39.4 inches) |
| Top Tube Length | 100 cm (23.6 inches) |
| Package Dimensions (L x W x H) | 109 cm x 32 cm x 102 cm |
| Package Weight | 32.0 kg |

Image: Detailed metric dimension diagram of the Aairsk S800 E-Bike, showing total length, handlebar height, wheelbase, seat height, and top tube length.

Image: Detailed imperial dimension diagram of the Aairsk S800 E-Bike, showing total length, handlebar height, wheelbase, seat height, and top tube length.
Setup
1. Unpacking and Initial Assembly
Your Aairsk S800 E-Bike comes partially assembled. Carefully remove all packaging materials. You will typically need to attach the front wheel, handlebars, pedals, and seat post. Refer to the included assembly guide for detailed, step-by-step instructions and diagrams. Ensure all bolts and quick releases are tightened to the manufacturer's specifications before riding.
2. Battery Installation
The 36V13AH lithium battery is removable. If not already installed, carefully slide the battery into its compartment on the frame until it clicks securely into place. Ensure it is locked to prevent theft and accidental dislodgement.
3. Initial Charge
Before your first ride, fully charge the battery. See the "Charging" section for detailed instructions.
4. Adjustments
- Seat Height: Adjust the seat height so that your leg has a slight bend at the knee when the pedal is at its lowest point. The adjustable leather seat allows for comfortable positioning.
- Handlebar Position: Ensure handlebars are aligned and tightened securely.
- Brakes: Check that both front and rear disc brakes engage smoothly and effectively. Adjust cable tension if necessary.
- Tires: Inflate tires to the recommended pressure indicated on the tire sidewall.
Operating Instructions
1. Powering On/Off
To power on the e-bike, use the provided card key to swipe and unlock the system. The smart LCD instrument panel will illuminate. To power off, swipe the card key again or hold the power button on the display (if available) until the system shuts down.
2. Riding Modes
Your Aairsk S800 E-Bike typically offers different levels of pedal assist. Use the controls on the handlebar to select your desired assist level. Higher levels provide more motor assistance, while lower levels require more pedal effort. You can also ride the bike without any motor assistance, like a traditional bicycle.
3. Gear Shifting
The e-bike is equipped with a 7-speed Shimano gear system. Use the shifter on the handlebar to change gears. Shift to lower gears for climbing hills or starting from a stop, and to higher gears for faster speeds on flat terrain. Always shift gears while pedaling lightly to ensure smooth transitions and prevent damage to the drivetrain.
4. Braking
The Aairsk S800 features front and rear dual disc brakes. Apply both brakes simultaneously for effective and controlled stopping. The brakes are designed to automatically cut off power to the motor when engaged, enhancing safety.
5. Lights
Activate the LED headlights for improved visibility during low-light conditions or night riding. The strong reflective taillights provide passive visibility from the rear. Ensure both are functioning correctly before riding.
Charging
The 36V13AH lithium battery requires approximately 5-6 hours for a full charge. There are two primary charging methods:
- Direct Insertion Charging: Connect the charger directly to the charging port on the e-bike while the battery is installed.
- Battery Removal and Separate Charging: Remove the battery from the e-bike and connect it to the charger independently. This is convenient if you need to charge the battery indoors or away from the bike.
Always use the original charger provided with your Aairsk S800 E-Bike. Do not use damaged chargers or attempt to modify the charging system. Charge in a well-ventilated area, away from flammable materials.

Image: Illustration demonstrating the two charging methods: direct charging with the battery installed, and separate charging with the battery removed from the bike.
Maintenance
Regular maintenance ensures the longevity and safe operation of your Aairsk S800 E-Bike.
- Cleaning: Clean the bike regularly with a damp cloth. Avoid using high-pressure washers directly on electrical components.
- Battery Care: Store the battery in a cool, dry place. If storing for extended periods, charge it to 50-70% every 1-2 months.
- Tire Pressure: Check tire pressure before each ride and inflate to the recommended PSI.
- Brakes: Inspect brake pads for wear and replace as needed. Ensure brake levers are responsive and cables are not frayed.
- Chain and Drivetrain: Keep the chain clean and lubricated. Inspect gears for wear or damage.
- Fasteners: Periodically check all bolts, nuts, and quick releases for tightness.
- Suspension: Keep the front fork clean and free of debris. If equipped with a lockable fork, ensure it functions smoothly.
Troubleshooting
If you encounter issues with your Aairsk S800 E-Bike, consider the following basic troubleshooting steps:
- Bike not powering on: Ensure the battery is fully charged and properly seated. Check if the card key system is functioning correctly.
- Motor not assisting: Verify the pedal assist level on the LCD display. Check battery charge. Ensure all electrical connections are secure.
- Brakes feel weak: Inspect brake pads for wear. Check brake cable tension.
- Unusual noises: Stop riding immediately and inspect the source of the noise. It could indicate a loose component or mechanical issue.
For more complex issues or repairs, it is recommended to contact a qualified e-bike technician or the seller's customer support.
User Tips
No specific user tips were available from provided reviews or Q&A. However, general tips for e-bike users include:
- Always plan your route considering battery range, especially for longer rides.
- Familiarize yourself with local e-bike regulations and always ride responsibly.
- Regularly check tire pressure for optimal performance and safety.
- Practice using the pedal assist levels and gears in a safe, open area before riding in traffic.
Warranty and Support
The Aairsk S800 E-Bike is CE certified, indicating compliance with European safety, health, and environmental protection standards. For specific warranty terms, conditions, and duration, please refer to the documentation provided at the time of purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.
For technical support or service inquiries, please contact the retailer or manufacturer's customer service department.