Introduction
Thank you for choosing the AVASTA Gemini 12-inch Kids BMX Bicycle. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new bicycle. Please read it thoroughly before use and retain it for future reference.
The AVASTA Gemini is designed for young riders aged 1 to 4 years, with a focus on safety, durability, and ease of use for beginners.

Image: AVASTA Gemini Kids BMX Bicycle, showcasing its BMX style and sturdy design.
Safety Information
Always prioritize safety when riding. Adult supervision is required. Ensure all components are correctly assembled and secured before each ride.
- Always wear a helmet that meets safety standards.
- Ensure the child's feet can touch the ground when seated on the saddle.
- Check tire pressure, brakes, and all bolts before each use.
- Ride in safe, open areas away from traffic and hazards.
- The enclosed chain guard prevents contact with the chain, reducing injury risk.
- Wide tires provide enhanced grip, minimizing slipping.
Package Contents
Your AVASTA Gemini 12-inch Kids BMX Bicycle package includes the following:
- AVASTA Gemini 12-inch Bicycle (85% pre-assembled)
- Training Wheels (Stabilisers)
- Basic Assembly Tools
- Instruction Manual
Setup and Assembly
The AVASTA Gemini bicycle is 85% pre-assembled. Final assembly typically takes about 20 minutes using the included basic tools. Follow these steps carefully:
- Install the Front Wheel: Secure the front wheel into the fork. Ensure the wheel is centered and the axle nuts are tightened securely.
- Attach the Handlebar: Insert the handlebar stem into the fork tube. Align the handlebar with the front wheel and tighten the stem bolt.
- Install the Pedals: Identify the left (L) and right (R) pedals. The left pedal tightens counter-clockwise, and the right pedal tightens clockwise. Ensure they are fully threaded and tightened.
- Adjust the Saddle: Adjust the saddle height so the child can comfortably touch the ground with their feet. Tighten the quick-release or bolt securely.
- Attach Training Wheels (if desired): Mount the training wheels to the rear axle. Ensure they are securely fastened and provide stable support.

Image: Key features including adjustable seat, durable wide tires, BMX handlebar, and removable training wheels (stabilisers).

Image: Durable Hi-ten Steel Frame and Enclosed Chain Guard for safety and longevity.
Operating Instructions
Riding the Bicycle
The AVASTA Gemini is designed for easy learning. With training wheels, children can focus on pedaling and steering. Once comfortable, the training wheels can be removed for independent riding.
- Starting: Help your child get on the bike. Ensure their feet are on the pedals.
- Pedaling: Encourage smooth, consistent pedaling.
- Steering: Guide your child to steer gently, looking where they want to go.
- Braking: The bike features a coaster brake (back-pedal brake). Instruct your child to pedal backward to engage the brake.

Image: Braking system details, including the front aluminum V-brake and rear drum brake for reliable stopping power.
Size Guide
Choosing the correct bike size is crucial for safety and comfort:
- 12-inch bike: Suitable for children aged 1 to 4 years or heights of 32 to 38 inches (81-97 cm).
- 14-inch bike: Suitable for children aged 3 to 5 years or heights of 35 to 43 inches (89-109 cm).
- 16-inch bike: Suitable for children aged 4 to 8 years or heights of 40 to 51 inches (102-130 cm).
Maintenance
Regular maintenance ensures the longevity and safe operation of your AVASTA Gemini bicycle.
- Cleaning: Clean the bike regularly with a damp cloth and mild soap. Avoid high-pressure water sprays.
- Lubrication: Periodically lubricate the chain with bicycle-specific chain lubricant.
- Tire Pressure: Check tire pressure before each ride. Maintain the recommended pressure indicated on the tire sidewall.
- Brakes: Regularly check brake functionality. Ensure the coaster brake engages smoothly and effectively.
- Bolts and Nuts: Periodically check and tighten all bolts and nuts, especially on the handlebars, seat post, and wheels.
- Storage: Store the bicycle in a dry place, away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pedals are loose | Incorrect installation or insufficient tightening. | Ensure pedals are threaded correctly (L for left, R for right) and tightened securely with a wrench. Remember the left pedal is reverse-threaded. |
| Brakes not effective | Worn brake pads (if applicable), loose brake cable (if applicable), or issue with coaster brake mechanism. | For coaster brakes, ensure the mechanism is clean and free of debris. If issues persist, consult a bicycle mechanic. |
| Tires flat or losing air quickly | Puncture or valve issue. | Check for punctures and repair or replace the inner tube. Ensure the valve cap is secure. Inflate to recommended pressure. |
| Handlebar or seat moves | Stem or seat post clamp is loose. | Tighten the stem bolt for the handlebar and the quick-release or bolt for the seat post. |
Specifications
| Brand | AVASTA |
| Model | Gemini |
| Bike Type | BMX Bike |
| Wheel Size | 12 Inches |
| Frame Material | High-strength Carbon Steel |
| Brakes | Coaster Brake (Back-pedal brake) |
| Number of Speeds | 1 |
| Recommended Age | 1 - 4 years |
| Special Features | Removable Training Wheels, Enclosed Chain Guard |
| Assembly Status | 85% Pre-assembled |
| Package Dimensions | 78 x 44.4 x 18.2 cm |
| Item Weight | 10.96 kg |
Warranty and Support
Warranty Information
AVASTA offers a limited lifetime warranty on the bicycle frame, ensuring its durability and your peace of mind. For details regarding the warranty terms and conditions, please refer to the warranty card included with your purchase or contact AVASTA customer service.
Customer Support
If you have any questions, require assistance with assembly, or encounter any issues with your AVASTA Gemini bicycle, please contact our customer support team. We are dedicated to providing excellent service and support.
For support, please visit the official AVASTA website or refer to the contact information provided in your product packaging.