Aairsk GT900 Electric Bike User Manual

1. Important Safety Information

Please read this manual carefully before operating your Aairsk GT900 Electric Bike. Failure to follow instructions can result in serious injury or damage to the product.

• 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, including checking brakes, tire pressure, and battery level.
• Do not operate the e-bike under the influence of alcohol or drugs.
• Be aware of your surroundings and ride defensively.

2. Product Overview

The Aairsk GT900 is a versatile adult electric bike designed for both city commuting and off-road adventures. It features a powerful 540W peak brushless motor, a long-lasting 36V 13AH (468Wh) removable battery, dual suspension for a comfortable ride, and a Shimano 21-speed gear system.

3. Specifications

4. Setup and Assembly

4.1 Initial Assembly

Your Aairsk GT900 Electric Bike may require some assembly upon arrival. Typically, this involves attaching the front wheel, handlebars, pedals, and seat. Refer to the included assembly guide for detailed, step-by-step instructions and diagrams.

4.2 Battery Installation and Charging

The GT900 features a removable 36V 13AH (468Wh) lithium battery, which is IPX6 waterproof and designed to be hidden within the frame to prevent theft.

1. Ensure the bike is turned off before installing or removing the battery.
2. Insert the battery into its designated compartment in the frame.
3. Lock the battery securely using the provided key.
4. To charge, connect the charger to the charging port on the bike or directly to the removed battery.
5. Plug the charger into a standard power outlet. The charging indicator light will show the charging status.
6. A full charge typically takes 4-5 hours. Do not overcharge.

4.3 Handlebar and Seat Adjustment

Adjust the handlebar and seat height to ensure a comfortable and safe riding position. Ensure all quick-release levers or bolts are securely tightened after adjustment.

4.4 Tire Inflation

Check tire pressure before each ride. Inflate tires to the recommended PSI indicated on the tire sidewall for optimal performance and safety across various terrains (Highway, Soil, Travel, Snow).

4.5 Brake Check

Ensure both front and rear dual disc brakes are functioning correctly before riding. Squeeze the brake levers to confirm they engage smoothly and effectively stop the wheels.

5. Operating Instructions

5.1 Powering On/Off and Keyless Unlock

The Aairsk GT900 features a smart LCD display and a keyless unlock system.

• To Unlock: With the provided Card Key, touch the Smart LCD Display. The bike will unlock.
• To Lock: Touch the LCD Display again with the Card Key to lock the bike.
• Use the power button on the LCD display to turn the e-bike system on or off.

5.2 Riding Modes

The GT900 offers three distinct riding modes to suit various preferences and terrains:

1. Classic Bike Pedal Mode: Ride the bike like a traditional bicycle, using only pedal power.
2. Throttle Mode: Use the thumb throttle to engage the motor and propel the bike without pedaling. This mode offers a range of approximately 18-23 miles.
3. Pedal Assist System (PAS) Mode: The motor provides assistance as you pedal. The GT900 features 5 levels of pedal assist. This mode offers an extended range of approximately 25-40 miles.

Switch between modes and adjust assist levels using the controls on the handlebar-mounted LCD display.

5.3 Gear Shifting

The bike is equipped with a Shimano 21-speed derailleur system for smooth and reliable gear changes. Use the shifters on the handlebars to select appropriate gears for different speeds and inclines.

5.4 Headlight and Horn

The integrated front light provides enhanced visibility. Operate the headlight and horn using the dedicated buttons on the handlebar controls.

6. Maintenance

6.1 Battery Care

• Charge the battery regularly, even if not in use, to maintain its health.
• Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
• Avoid completely draining the battery before recharging.
• Use only the original charger provided with the bike.

6.2 Tire Maintenance

• Regularly check tire pressure and inflate to the recommended PSI.
• Inspect tires for wear, cuts, or punctures before each ride.

6.3 Brake Maintenance

• Periodically check brake pads for wear and replace them when necessary.
• Ensure brake cables are properly tensioned and lubricated.
• If disc brakes feel spongy or ineffective, have them inspected by a qualified technician.

6.4 General Cleaning

• Clean the bike regularly with a damp cloth and mild detergent. Avoid high-pressure washing directly on electrical components.
• Lubricate the chain periodically to ensure smooth operation and prevent rust.

6.5 Suspension Care

The dual suspension system (front fork and rear shock-absorbing) provides a smoother ride. Keep suspension components clean and free of debris. Refer to the suspension manufacturer's guidelines for specific maintenance if available.

7. Troubleshooting

• Bike not powering on: Check if the battery is fully charged and properly installed. Ensure the keyless unlock system has been used correctly.
• Motor not assisting: Verify that pedal assist mode is selected and the assist level is not set to zero. Check if the throttle is engaged (if using throttle mode).
• Reduced range: This can be due to low tire pressure, riding in higher assist/throttle modes, heavy loads, or riding against strong winds. Ensure the battery is fully charged before each ride.
• Brakes squealing: This can be caused by dirt on the brake pads or rotors, or misaligned calipers. Clean the brakes or have them adjusted by a professional.
• Shifting issues: Ensure the chain is clean and lubricated. If shifting is still problematic, the derailleur may need adjustment.

8. User Tips

• Battery Security: The hidden battery design helps prevent theft. Always ensure the battery is locked in place when leaving the bike unattended.
• Range Optimization: For maximum range, utilize the Pedal Assist System (PAS) and choose lower assist levels. Avoid aggressive acceleration with the throttle.
• Terrain Versatility: The dual suspension and robust tires make this bike suitable for various terrains. Adjust your riding style and speed according to the surface conditions.

9. Warranty and Support

For warranty information, 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 reach out to the EU Stock E-bike Store customer service.