1. Product Overview
The isinwheel K3 Hoverboard Seat Attachment transforms your compatible two-wheel self-balancing scooter into a seated go-kart. This attachment is designed for enhanced stability and a different riding experience. It features an adjustable frame length to accommodate various user heights and is compatible with hoverboards ranging from 6.5 inches to 10 inches in wheel size.

Image 1.1: The isinwheel K3 Hoverboard Seat Attachment, showing the main frame, seat, handles, front wheel, and attachment straps.
2. What's Included
Please verify that all components are present before assembly:
- Main Frame with Seat
- Adjustable Front Wheel Bar
- Left and Right Control Handles
- Attachment Straps (6 pieces)
- Assembly Hardware (bolts, nuts, washers, wrench, hex key)
- User Manual

Image 2.1: All parts of the K3 Hoverboard Seat Attachment, including the seat, frame, handles, front wheel assembly, hardware, and replacement straps.
3. Setup and Assembly
Follow these steps to assemble your isinwheel K3 Hoverboard Seat Attachment:
- Install the Control Handles: Attach the left and right control handles to the main frame using the provided bolts and nuts. Ensure they are securely fastened.
- Attach the Front Wheel Bar: Slide the adjustable front wheel bar into the main frame. Align the holes and fasten it with the adjustment knob. This allows for length adjustment.
- Install the Seat: Place the seat onto the designated mounting points on the frame and secure it with the provided screws and washers.
- Connect to Hoverboard:
- Position the hoverboard seat attachment over your hoverboard.
- Ensure the rubber pads on the attachment rest directly on the hoverboard's footpads to prevent scratches.
- Use the Velcro straps to securely fasten the attachment to your hoverboard. Wrap the straps tightly around the hoverboard and through the attachment loops.

Image 3.1: Detail of how the control handles attach to the main frame.

Image 3.2: The adjustment knob used to secure and adjust the frame length.
Video 3.1: A detailed assembly guide for the isinwheel K3 Hoverboard Seat Attachment, demonstrating handle installation, frame adjustment, seat attachment, and securing the unit to a hoverboard.
4. Operating Instructions
Once assembled and securely attached to your hoverboard, operating the go-kart is intuitive:
- Sitting Position: Sit comfortably in the seat with your feet on the footrests.
- Steering: Use the two control handles to steer. Pushing both handles forward moves the go-kart forward. Pulling both handles back moves it in reverse.
- Turning: To turn left, push the right handle forward and pull the left handle back. To turn right, push the left handle forward and pull the right handle back.
- Swivel Wheel: The front swivel wheel allows for 360-degree rotation, providing agile maneuverability.

Image 4.1: Visual guide illustrating how to control the go-kart for forward, reverse, and turning maneuvers using the handles.
Video 4.1: Demonstrates various users operating the isinwheel K3 Hoverboard Seat Attachment, showcasing forward movement, turns, and the overall riding experience.
5. Maintenance
Regular maintenance ensures the longevity and safe operation of your hoverboard seat attachment:
- Check Fasteners: Periodically inspect all bolts, nuts, and the adjustment knob to ensure they are tight. Re-tighten as necessary.
- Strap Inspection: Examine the Velcro straps for wear and tear. Replace them if they show signs of damage or reduced grip.
- Cleaning: Wipe down the frame and seat with a damp cloth. Avoid harsh chemicals that could damage the materials.
- Storage: Store the attachment in a dry place away from direct sunlight and extreme temperatures when not in use.
6. Troubleshooting
If you encounter issues with your hoverboard seat attachment, consider the following:
- Loose Connection to Hoverboard: If the attachment feels wobbly, ensure the Velcro straps are pulled as tight as possible. The rubber pads should be firmly pressed against the hoverboard.
- Difficulty Steering: Check that the control handles are securely attached and move freely. Ensure your hoverboard is properly calibrated and functioning correctly.
- Uncomfortable Ride: Adjust the frame length to find the most comfortable position for your legs and reach to the handles.
7. Specifications
| Feature | Detail |
|---|---|
| Model | K3 |
| Compatibility | 6.5", 8", 8.5", 10" Two-Wheel Self-Balancing Scooters (Hoverboards) |
| Maximum Weight Recommendation | 270 Pounds (122.5 kg) |
| Item Weight | 11.6 Pounds (5.26 kg) |
| Product Dimensions (Adjustable) | 12 x 37.5 x 14.8 inches (approximate, length adjustable) |
| Adjustable Frame Length | 27.5" - 35" |
| Front Wheel | 360° Swivel Caster Wheel |

Image 7.1: Detailed dimensions of the isinwheel K3 Hoverboard Seat Attachment, including seat width, handles length, adjustable base width, adjustable frame length, and front wheel height.

Image 7.2: Illustration of the K3 Hoverboard Seat Attachment's compatibility with various hoverboard wheel sizes (6.5", 8", 8.5", 10").
8. Safety Guidelines
Always prioritize safety when using the hoverboard seat attachment:
- Wear appropriate safety gear, including a helmet, knee pads, and elbow pads.
- Operate in safe, open areas away from traffic, pedestrians, and obstacles.
- Ensure the attachment is securely fastened to the hoverboard before each use.
- Do not exceed the maximum weight recommendation of 270 pounds.
- Supervise children at all times during use.
9. Warranty and Support
For warranty information, technical support, or replacement parts, please contact isinwheel customer service. Refer to the contact details provided on the product packaging or the official isinwheel website.
Manufacturer: Jinyun county Ronghui Industry And Trade Co.,Ltd
Address: No.18, Xinhzhong Dong Road, Xinbi Industrial Zone, Jinyun, Lishui City, Zhejiang, China





