Aairsk GT900 Ebike User Manual

1. Introduction

Thank you for choosing the Aairsk GT900 Ebike. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your electric bicycle. Please read this manual thoroughly before your first ride and keep it for future reference. Proper use and maintenance will ensure a long and enjoyable experience with your ebike.

Figure 1: Aairsk GT900 Ebike

2. Safety Information

⚠️ WARNING: Potential Fire Risk. Strictly follow the instruction manual for charging and storage. While using the product, please wear protective equipment and fully comply with all applicable laws and regulations.

• Always wear a helmet and appropriate safety gear when riding.
• Ensure all components are correctly assembled and tightened before each ride.
• Familiarize yourself with local ebike regulations regarding speed, usage, and safety.
• Do not operate the ebike under the influence of alcohol or drugs.
• Be aware of your surroundings and ride defensively.
• Regularly check brakes, tires, and battery for optimal performance and safety.
• Do not modify the ebike's electrical system or motor.

3. Package Contents

Upon unpacking, please verify that all items listed below are present and undamaged:

• 1 x Aairsk GT900 Ebike
• 1 x Battery (pre-installed or separate)
• 1 x Battery Charger
• 1 x NFC Unlock Card Key
• 1 x Tool Set
• 1 x Mudguard (may be pre-installed)
• 1 x Rear Shelf (may be pre-installed)
• 1 x User Manual (this document)

Figure 2: Contents of the Aairsk GT900 Ebike package

4. Specifications

Figure 3: Ebike Dimensions and Rider Specifications

5. Assembly and Setup

Your Aairsk GT900 Ebike may require some assembly upon arrival. Please follow these general steps. Refer to the included quick start guide or detailed assembly instructions for specific visuals and torque specifications.

5.1 Unpacking

1. Carefully remove the ebike and all components from the packaging.
2. Inspect for any shipping damage. Contact customer support immediately if damage is found.
3. Remove all protective packaging materials.

5.2 Handlebar Installation

• Attach the handlebar to the stem, ensuring it is centered and the brake levers and shifters are in a comfortable position.
• Tighten the stem bolts securely.

5.3 Front Wheel Installation

• Insert the front wheel into the fork dropouts.
• Ensure the brake rotor is correctly seated within the brake caliper.
• Secure the wheel using the quick-release skewer or axle nuts.

5.4 Pedal Installation

• Identify the left (L) and right (R) pedals.
• Thread the 'L' pedal counter-clockwise into the left crank arm.
• Thread the 'R' pedal clockwise into the right crank arm.
• Tighten firmly with a wrench.

5.5 Seat Post Installation

• Insert the seat post into the frame's seat tube.
• Adjust the seat height for comfortable pedaling (your leg should have a slight bend at the knee when the pedal is at its lowest point).
• Secure the seat post clamp.

5.6 Battery Installation & Initial Charge

• If the battery is separate, carefully slide it into its compartment on the frame until it clicks securely.
• Ensure the battery is locked in place to prevent theft and accidental dislodgement.
• Fully charge the battery before your first ride (refer to Section 7 for charging instructions).

6. Operating Instructions

6.1 Powering On/Off & NFC Unlock

• To power on the ebike, ensure the battery is installed and charged.
• Touch the NFC Card Key to the designated area on the Smart LCD Display to unlock the ebike. The display will illuminate.
• To lock and power off, touch the NFC Card Key to the display again.

Figure 4: Smart LCD Display and NFC Keyless Unlock

6.2 Smart LCD Display Functions

The LCD display provides real-time information about your ride:

• Speed: Current riding speed.
• Battery Level: Indicates remaining battery charge.
• Assist Level: Shows the current pedal assist level (PAS).
• Odometer/Trip: Tracks total distance or current trip distance.
• Error Codes: Displays diagnostic codes if an issue occurs.

Use the '+' and '-' buttons on the display to adjust pedal assist levels or navigate menu options.

Figure 5: Handlebar Controls (LCD, Derailleur, Brakes, Throttle, Lights/Horn)

6.3 Driving Modes

The Aairsk GT900 offers three driving modes to suit various riding conditions:

• Classic Bike Pedal Mode (A-Z): No electrical assistance. Ride like a traditional bicycle.
• Throttle Modes (A-B): Use the thumb throttle for power without pedaling. Range: 30-40 km.
• Assist Modes (A-C): Pedal-Assist System (PAS) provides motor assistance as you pedal. Adjust the assist level via the LCD. Range: 40-60 km.

Figure 6: Explanation of the 3 Driving Modes

6.4 Shifting Gears (Shimano 21-Speed)

Use the Shimano shifters on the handlebar to change gears. The left shifter controls the front derailleur (larger gear changes), and the right shifter controls the rear derailleur (smaller gear changes). Shift smoothly and avoid shifting under heavy load to prolong drivetrain life.

Figure 7: Shimano 21-Speed Shifter Detail

6.5 Braking (Dual Disc Brakes)

The ebike is equipped with front and rear dual disc brakes for effective stopping power. The right lever typically controls the rear brake, and the left lever controls the front brake. Apply both brakes simultaneously for optimal stopping and control. Practice braking in a safe area to get accustomed to their feel.

Figure 8: Dual Disc Brakes Detail

7. Battery Information and Charging

7.1 Battery Features

• Type: 36V 13AH (468Wh) Lithium Battery
• Certification: UL2849-Certificated
• Waterproof Rating: IPX6
• Protection: Built-in Battery Management System (BMS) for safety and longevity.
• Removable: The hidden battery design helps prevent theft.

Figure 9: Removable 468Wh Battery Details

7.2 Charging Procedure

1. Ensure the ebike is powered off before charging.
2. Locate the charging port on the ebike or remove the battery for off-bike charging.
3. Connect the charger to the battery charging port.
4. Plug the charger into a standard wall outlet (100-240V AC).
5. The charger indicator light will typically show red during charging and turn green when fully charged.
6. Charging time is approximately 4-6 hours for a full charge.
7. Disconnect the charger once charging is complete.

7.3 Battery Care and Storage

• Do not overcharge or completely drain the battery.
• Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
• If storing for extended periods, charge the battery to 50-70% every 1-2 months.
• Do not expose the battery to water or fire.
• If the battery is damaged or shows signs of overheating, discontinue use immediately and contact support.

8. Maintenance

Regular maintenance is crucial for the longevity and safe operation of your ebike.

8.1 General Cleaning

• Wipe down the frame and components with a damp cloth. Avoid using high-pressure washers directly on electrical components.
• Clean the chain regularly and lubricate it with bicycle-specific chain lubricant.

8.2 Tire Pressure

• Check tire pressure before each ride. Recommended pressure is usually indicated on the tire sidewall.
• Proper tire pressure improves ride comfort, efficiency, and reduces the risk of punctures.

Figure 10: 24-inch Wider Tire for Versatile Terrain Handling

8.3 Brakes

• Regularly inspect brake pads for wear and replace them when necessary.
• Ensure brake levers feel firm and responsive. Adjust cable tension if needed.
• Check brake rotors for any bends or damage.

8.4 Drivetrain

• Keep the chain, cassette, and chainrings clean and lubricated.
• Check for proper gear shifting. Adjust derailleur cables if shifting becomes imprecise.

8.5 Suspension

• Inspect the front suspension fork and rear shock absorber for any leaks or damage.
• Ensure the suspension lock-out mechanism (if present) functions correctly.

Figure 11: Dual Suspension System for smoother rides

9. Troubleshooting

This section covers common issues you might encounter with your Aairsk GT900 Ebike. For problems not listed here or if solutions do not work, please contact customer support.

10. User Tips

• Vary Your Riding Modes: Experiment with the different driving modes (Pedal, Throttle, Assist) to find the most efficient and enjoyable way to ride for various terrains and distances.
• Regular Tire Checks: Maintaining optimal tire pressure not only prevents flats but also significantly improves battery range and ride comfort.
• Secure Your Ebike: Always use the NFC key to lock your ebike when not in use. Consider additional physical locks for enhanced security.
• Plan Your Routes: For longer rides, consider the terrain and your chosen assist level to estimate battery range accurately.
• Stay Visible: Utilize the built-in front light and consider adding reflective gear, especially when riding in low-light conditions.

11. Warranty and Support

Aairsk is committed to providing high-quality products and excellent customer service. Your Aairsk GT900 Ebike comes with a 1-year warranty covering manufacturing defects. For warranty claims or technical support, please contact the seller or Aairsk customer service directly.

Return & Refund Policy: Please refer to the seller's specific return and refund policy for details on product returns and exchanges.

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.