1. Introduction
The isinwheel SK12/SK14 Electric Balance Bike is designed to provide a fun and engaging riding experience for children aged 3 to 8. This manual provides essential information for the safe assembly, operation, and maintenance of your electric balance bike. Please read all instructions carefully before first use.

Figure 1: isinwheel SK12 Electric Balance Bike. This model features a sleek black design, suitable for young riders.
Safety Warnings
- Always ensure the rider wears a properly fitted helmet and appropriate protective gear, including knee pads and elbow pads.
- Adult supervision is required at all times when the bike is in use.
- Do not exceed the maximum weight recommendation of 110 pounds (50 kg).
- Do not exceed the maximum speed of 7 MPH (11.3 km/h).
- Ride only in safe, open areas away from vehicular traffic, pedestrians, and other hazards.
- Inspect the bike, especially brakes and tires, before each ride to ensure they are in good working condition.
- Avoid riding in wet conditions, on steep inclines, or on uneven terrain.
2. What's in the Box
Upon opening the package, please verify that all the following components are included:
- isinwheel Electric Balance Bike (main frame with rear wheel and motor)
- Front Wheel
- Handlebars
- Seat
- Rear Fender
- Battery (1 Lithium Ion)
- Charger
- Hex Key
- Wrench
- Front Axle
- Instruction Manual (this document)
- Brand Card
3. Setup and Assembly
The isinwheel Electric Balance Bike comes 90% pre-installed, requiring minimal assembly. Follow these steps to get your bike ready for its first ride.
Assembly Video Guide
Video 1: Full Unboxing and Build of the SK12 by isinwheel. This official seller video provides a comprehensive guide to assembling the electric balance bike.
Step-by-Step Assembly
- Attach the Front Wheel:
Align the front wheel with the forks. Insert the front axle through the wheel hub and secure it with the provided nuts and washers. Ensure the directional arrow on the tire points forward. Tighten securely with the wrench.
Figure 2: The bike features a 12-inch inflatable tire, disc brakes, 150W peak power, and a 110lb max load capacity, ensuring a safe and fun ride for children.
- Install Handlebars:
Loosen the clamp on the handlebar stem. Insert the handlebars into the stem and adjust to the desired angle. Tighten the clamp firmly using the hex key to ensure the handlebars are secure and do not rotate.
Figure 3: Detail of the handlebars, featuring comfortable rubber grips, a bell, and the electronic throttle and brake levers.
- Adjust the Seat:
The seat height is adjustable to accommodate children of different ages and heights (13.4 inches to 16.5 inches). Loosen the quick-release lever on the seat post, adjust the seat to a comfortable height where the child can easily touch the ground with their feet, and then firmly close the quick-release lever.
Figure 4: The adjustable seat includes a convenient handle at the rear, allowing parents to assist with balance and control during early learning stages.
- Charge the Battery:
Before first use, fully charge the battery. The swappable battery design allows for easy removal for charging. Connect the charger to the battery and plug it into a power outlet. The indicator light on the charger will show charging status (typically red for charging, green for fully charged). A full charge takes approximately 1.5 to 2 hours.
Figure 5: The bike features a long-lasting, removable battery that can be easily swapped out for continuous fun. The battery is also compatible with some power tools.
4. Operating Instructions
Starting the Bike
The isinwheel Electric Balance Bike features a unique start-up mechanism. There is no need to press an on/off button to activate the motor. Simply glide with both feet to gain initial speed, and the motor will automatically engage. If the bike is not glided for two minutes, it will automatically shut off to conserve battery. Glide again to reactivate.
Speed Adjustment
The bike offers two adjustable speed settings for different skill levels:
- Low Speed: Approximately 3.7 MPH (6 km/h)
- High Speed: Approximately 6.2 MPH (10 km/h)
The speed button is located under the bike. Press it to toggle between the two speed modes. The maximum speed is capped at 7 MPH for safety.
Video 2: The Best Christmas Gifts for Your Kids. This video demonstrates the bike's features, including speed modes and riding in various environments.
Braking System
The SK12/SK14 is equipped with a reliable electronic braking system and dual disc brakes for efficient and responsive stopping power. The brake lever is located on the handlebars. Riders should practice braking in a safe area before riding at higher speeds.

Figure 6: The bike features robust disc brakes on the rear wheel, providing reliable stopping power for enhanced safety.
Foot Placement
Once the motor is engaged, riders can place their feet on the designated footrests located on the frame. This allows for a comfortable and stable riding position while the electric motor propels the bike.
5. Maintenance
Regular maintenance ensures the longevity and safe operation of your isinwheel Electric Balance Bike.
- Battery Care: Always charge the battery fully after each use. Store the battery in a cool, dry place. If storing for an extended period, charge the battery to about 50% every 2-3 months.
- Tire Pressure: The bike uses inflatable tires. Regularly check and maintain the recommended tire pressure for optimal performance and safety.
- Cleaning: Wipe down the bike with a damp cloth after use. Avoid using high-pressure water jets or harsh chemicals, which can damage electronic components.
- Brake Inspection: Periodically check the brake pads and disc for wear. Ensure the brake lever operates smoothly and provides adequate stopping power. Adjust or replace components as needed.
- General Inspection: Regularly check all nuts, bolts, and connections to ensure they are tight and secure.
6. Troubleshooting
If you encounter any issues with your isinwheel Electric Balance Bike, refer to the following common problems and solutions:
- Bike Not Powering On:
- Ensure the battery is fully charged.
- Verify that the battery is correctly inserted and securely latched into its compartment.
- Confirm that the bike is glided to activate the motor, as it does not have a manual power button.
- Short Battery Life:
- Ensure the battery is fully charged before each ride.
- Battery life can be affected by terrain (uphill riding), rider weight, and ambient temperature.
- If battery life significantly degrades, the battery may need replacement.
- Motor Not Engaging / No Power to Wheel:
- Confirm the bike is glided to initiate movement.
- Check the connection of the motor cables.
- Ensure the speed setting is not in a neutral or off position (if applicable to the specific model's display).
- Brakes Not Responsive:
- Inspect the brake cables for any kinks or damage.
- Check the brake pads and disc for excessive wear.
- Ensure the brake lever is properly adjusted and provides firm resistance.
For issues not covered here, please refer to the Warranty and Support section for customer service contact information.
7. Specifications
Feature | Specification |
---|---|
Bike Type | Balance Bike |
Model Name | SK12 (SK14 variant available) |
Age Range (Recommended) | 3-8 years old |
Frame Material | Aluminum |
Wheel Size | 12 Inches (SK12), 14 Inches (SK14) |
Motor Wattage | 150 Watts (SK12), 250 Watts (SK14) |
Number of Speeds | 2 (3.7 MPH / 6.2 MPH) |
Maximum Speed | Up to 7 MPH (11.3 km/h) |
Maximum Range | Approx. 6.2 miles (10 km) on a full charge |
Battery Type | 1 Lithium Ion (included) |
Lithium Battery Energy Content | 150 Watt Hours |
Brake Style | Dual Disc Brake |
Suspension Type | Rear |
Item Weight | 18 Pounds (8.16 kg) |
Maximum Weight Recommendation | 110 Pounds (50 kg) |
Assembly Required | Yes (Partially) |
8. Warranty and Support
isinwheel is committed to providing high-quality products and excellent customer service.
- Warranty: The isinwheel Electric Balance Bike comes with a One-Year Warranty.
- Quality Assurance: isinwheel provides 365 days of quality assurance. If there is any problem with the battery or other accessories, immediate reissue is available without waiting for repairs.
- Customer Service: For any product issues or support needs, please contact isinwheel's customer service team, available 24/7/365 online.