Aairsk GT900 Electric Bicycle User Manual

1. Important Safety Information

Please read this manual thoroughly before operating your Aairsk GT900 Ebike. Failure to follow instructions and safety guidelines may result in serious injury or damage to the product.

• Always wear a helmet and appropriate safety gear when riding.
• Comply with all local laws and regulations regarding electric bicycle use.
• Be aware of potential fire risks associated with batteries; follow charging and storage instructions carefully.
• Regularly inspect your ebike for any signs of wear, damage, or loose components.
• Do not modify the ebike's electrical system or components.

2. Product Overview

The Aairsk GT900 is a full-suspension electric mountain bike designed for various terrains, featuring a powerful motor, long-range battery, and multiple riding modes.

3. Setup and Assembly

Your Aairsk GT900 Ebike requires some assembly before its first ride. While the process is generally straightforward, it is recommended to seek professional assistance if you are unsure about any steps.

3.1 Unpacking

Carefully remove all components from the packaging. Retain packaging materials for future transport or storage.

3.2 Initial Assembly Steps

1. Handlebar Installation: Attach the handlebar to the stem, ensuring it is centered and tightened securely.
2. Front Wheel Attachment: Install the front wheel, making sure the quick-release skewer or axle nuts are properly secured.
3. Pedal Installation: Attach the pedals. Note that pedals are typically marked 'L' for left and 'R' for right, and the left pedal has a reverse thread. Ensure they are tightened firmly.
4. Seat Post and Saddle: Insert the seat post into the frame and adjust the saddle height for comfortable riding. Secure the quick-release clamp.
5. Mudguards (Optional): Attach the front and rear mudguards if desired.

3.3 Pre-Ride Checks

• Tire Inflation: Inflate tires to the recommended pressure indicated on the tire sidewall.
• Brake Check: Test both front and rear brakes to ensure they engage properly and stop the bike effectively.
• Battery Charge: The battery may arrive with a low charge. Fully charge the battery before your first ride. Refer to Section 4.1 for charging instructions.
• Electrical Connections: Ensure all visible electrical connections are secure.

User Tip: Some users recommend applying RTV sealant to frame holes and the frame bottom to prevent water ingress into the electrical components, especially if riding in wet conditions.

4. Battery and Charging

The Aairsk GT900 is equipped with a removable 36V 13AH (468Wh) UL2849-Certificated Lithium battery, designed to be waterproof (IPX6) and protected by a Battery Management System (BMS).

4.1 Charging Instructions

1. Ensure the ebike is turned off before charging.
2. Locate the charging port on the battery or frame.
3. Connect the charger to the charging port, then plug the charger into a standard wall outlet.
4. The charging indicator on the charger will typically show red during charging and turn green when fully charged.
5. Charging time is approximately 4-5 hours for a full charge.
6. Disconnect the charger once charging is complete.

User Tip: The ebike's display may show 100% charge even if the battery is not fully charged. It is recommended to leave the charger connected until the charger's indicator light turns green, signifying that the charger has switched to standby mode, ensuring a complete charge.

4.2 Battery Care

• Avoid completely draining the battery.
• Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
• If storing for an extended period, charge the battery to approximately 50-70% and check it periodically.
• Do not expose the battery to water or moisture beyond its IPX6 rating.

5. Operating Your Ebike

The Aairsk GT900 offers various modes and features for a versatile riding experience.

5.1 Power On/Off and Keyless Unlock

• To power on the ebike, press and hold the power button on the Smart LCD display.
• To unlock the ebike using the card key: Touch the card key to the LCD display.
• To lock the ebike: Touch the card key to the LCD display again.
• To power off, press and hold the power button on the display.

5.2 Riding Modes

The GT900 features three primary riding modes and 5 levels of pedal assist:

• Classic Bike Pedal Mode: Ride the ebike like a traditional bicycle, using only pedal power.
• Throttle Mode: Use the thumb throttle to engage the motor without pedaling. This mode typically offers a range of 18-23 miles.
• Pedal Assist System (PAS) Mode: The motor provides assistance as you pedal. There are 5 levels of pedal assist, allowing you to choose the amount of motor support. This mode typically offers a range of 25-40 miles.

5.3 Gear Shifting

The ebike is equipped with a Shimano 21-speed gear system. Use the shifters on the handlebar to change gears according to terrain and desired effort. Smooth shifting ensures a comfortable ride.

5.4 Braking

The Aairsk GT900 features front and rear dual disc brakes for reliable stopping power. Squeeze the brake levers on the handlebar to engage the brakes. Apply both brakes simultaneously for optimal control and safety.

5.5 Headlight Operation

The ebike is equipped with a front headlight for improved visibility. Operate the light using the controls on the handlebar or display, as indicated in Figure 5.1.

5.6 Speed Restriction/Unlocking

The ebike may be speed-restricted to comply with local regulations (e.g., 15 mph or 25 km/h). To unlock the speed to approximately 25 mph (or re-restrict it):

1. Ensure the ebike is powered off.
2. Hold the front brake lever and the throttle simultaneously.
3. While holding the brake and throttle, power on the ebike.
4. Continue holding for approximately 30 seconds.
5. Release both the brake and throttle.
6. Power off the ebike, then power it back on. The speed setting should now be changed.

6. Maintenance

Regular maintenance ensures the longevity and safe operation of your Aairsk GT900 Ebike.

6.1 General Cleaning

Clean your ebike regularly with a damp cloth. Avoid using high-pressure washers directly on electrical components or bearings.

6.2 Tire Maintenance

• Regularly check tire pressure and inflate to the recommended PSI.
• Inspect tires for wear, cuts, or embedded objects.

6.3 Brake Maintenance

• Check brake pads for wear and replace them when necessary.
• Ensure brake levers are responsive and cables (if applicable) are not frayed.
• Adjust brake tension as needed.

6.4 Gear System Maintenance

• Keep the chain clean and lubricated.
• Check for proper gear shifting and adjust the derailleur if shifting becomes rough or inaccurate.

6.5 Electrical System

• Periodically check all visible electrical cables and connections for damage or looseness.
• Ensure the battery compartment is clean and dry.

7. Troubleshooting

This section addresses common issues you might encounter with your Aairsk GT900 Ebike.

8. Specifications

9. User Tips

• Assembly Assistance: If you find assembly challenging, many online resources, including YouTube videos and community forums, offer helpful guidance.
• Tire Upgrade: The stock tires may be prone to punctures, especially on rough terrain. Consider upgrading to more robust, puncture-resistant tires for improved durability and peace of mind.
• Electrical Sealing: To protect against water ingress, particularly in wet conditions, consider applying a sealant (like RTV) to any exposed frame holes or the bottom of the frame where electrical components might be vulnerable.
• Gear Shifter Stiffness: Be aware that the gear shifters might feel stiff initially. Consistent use and proper lubrication can help improve their smoothness over time.
• Battery Charging Display: Do not rely solely on the ebike's display for battery charge status. Always wait for the charger's indicator light to turn green to ensure a full charge.

10. Warranty and Support

For warranty information, please refer to the terms and conditions provided at the time of purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.

For technical support or assistance with parts, please contact the retailer or manufacturer's customer service.