Introduction
This manual provides essential information for the safe assembly, operation, and maintenance of your Deryan 3-in-1 Kids Bicycle. Please read it thoroughly before first use and retain it for future reference. This bicycle is designed to adapt to your child's growth, transitioning from a balance bike to a pedal bike with or without training wheels.
Safety Information
Always prioritize safety when using the Deryan Kids Bicycle. Failure to follow these instructions may result in serious injury.
- Helmet Use: Always ensure your child wears a properly fitted helmet that meets safety standards.
- Adult Supervision: Children should always be supervised by an adult while riding the bicycle.
- Pre-Ride Check: Before each ride, check that the brakes are functioning correctly, tires are adequately inflated, and all bolts and quick-release levers are securely tightened.
- Appropriate Terrain: Use the bicycle on flat, even surfaces away from traffic, steep hills, or obstacles.
- Clothing: Ensure clothing, shoelaces, and other items do not get caught in the wheels or chain.
- Weight Limit: Do not exceed the maximum recommended weight of 30 kg.
What's in the Box
Your Deryan 3-in-1 Kids Bicycle package includes the following components:
- Partially pre-assembled bicycle frame
- Training Wheels
- Reflectors
- Bell
- Basic assembly tools
Setup and Assembly
The Deryan 3-in-1 Kids Bicycle arrives partially pre-assembled. Assembly typically takes about 15 minutes with basic tools provided.
1. Unpacking and Initial Inspection
Carefully remove all components from the packaging. Check for any damage or missing parts. If anything is amiss, contact customer support immediately.
2. Handlebar Installation and Adjustment
Insert the handlebar stem into the fork tube. Ensure the handlebar is aligned straight with the front wheel. Tighten the stem bolt securely. The handlebar height can be adjusted to suit your child's comfort.

Image: Close-up of the bicycle's handlebar showing vertical adjustment arrows, indicating its adjustable height feature.
3. Seat Post Installation and Adjustment
Insert the seat post into the frame's seat tube. Adjust the seat height so your child can comfortably touch the ground with their feet while seated. Secure the quick-release lever or bolt firmly.

Image: Side view of the bicycle's seat and seat post, with arrows indicating vertical adjustment, highlighting the adjustable seat height.
4. Pedal Installation
Identify the left (L) and right (R) pedals. Thread the right pedal clockwise into the right crank arm and the left pedal counter-clockwise into the left crank arm. Tighten them firmly with a wrench.
5. Training Wheels Installation (Optional)
If your child is learning to ride, attach the training wheels to the rear axle. Ensure they are securely fastened and provide stable support. The training wheels are designed to be rigid and not bend.

Image: Close-up of the rear wheel area, showing a training wheel attached and the fully enclosed chain guard.
6. Final Checks
Before the first ride, double-check all connections, brake functionality, and tire pressure. Ensure the chain guard is fully closed to protect fingers and clothing.

Image: A Deryan 3-in-1 Kids Bicycle in pink, fully assembled with training wheels, ready for use.
Operating the Bicycle
The Deryan 3-in-1 Kids Bicycle is designed to evolve with your child's skill level.
1. 3-in-1 Functionality
- Balance Bike Mode: Remove the pedals and training wheels. This allows your child to learn balance and steering by pushing off the ground with their feet.
- Training Wheels Mode: Attach the training wheels and pedals. This provides stability for initial pedaling practice.
- Standard Bicycle Mode: Once your child has mastered balance and pedaling, remove the training wheels for a traditional cycling experience.

Image: A visual representation showing the Deryan 3-in-1 Kids Bicycle transforming between balance bike, training wheel bike, and standard pedal bike configurations.
2. Riding Posture and Adjustments
Ensure the seat and handlebar are adjusted to the correct height for your child. A proper fit allows for comfortable pedaling and safe control. The soft rubber grips on the handlebars provide a firm, non-slip hold.

Image: A young child riding the Deryan 3-in-1 Kids Bicycle outdoors, demonstrating proper riding posture.
3. Braking
The bicycle is equipped with caliper brakes. Teach your child how to use both front and rear brakes smoothly and effectively. Practice braking in a safe, open area.

Image: A close-up view of a child's hands on the bicycle handlebars, showing the brake levers and bell.
Maintenance
Regular maintenance ensures the longevity and safe operation of your Deryan Kids Bicycle.
- Tire Pressure: Check tire pressure regularly. Inflate air tires to the recommended PSI (usually indicated on the tire sidewall).
- Chain Care: The bicycle features a fully enclosed chain guard, reducing the need for frequent chain cleaning and lubrication. Periodically check the chain for excessive dirt or rust and lubricate if necessary.
- Brake Check: Inspect brake pads for wear and ensure brake levers operate smoothly and effectively. Adjust brake cables if needed.
- Cleaning: Clean the bicycle with a damp cloth and mild soap. Avoid high-pressure water sprays directly on bearings or electrical components.
- Fasteners: Periodically check all nuts, bolts, and quick-release mechanisms for tightness.
Troubleshooting
Here are some common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tires are flat or soft | Low air pressure, puncture | Inflate tires to recommended PSI. Check for punctures and repair if necessary. |
| Brakes feel loose or ineffective | Loose brake cable, worn brake pads | Adjust brake cable tension. Replace worn brake pads. |
| Pedals are difficult to turn | Tight chain, dirty bearings | Check chain tension and lubricate. Clean and inspect pedal bearings. |
| Squeaking noises | Dry chain, loose parts, brake rub | Lubricate chain. Tighten all bolts. Adjust brake calipers. |
If you encounter issues not listed here or require further assistance, please contact Deryan customer support.
Specifications
Detailed specifications for the Deryan 3-in-1 Kids Bicycle:
| Feature | Detail |
|---|---|
| Bike Type | Kids' Bike |
| Age Range Description | Toddler |
| Brand | Deryan |
| Number of Speeds | 1 |
| Wheel Size | 12, 14, or 16 Inches (depending on variant) |
| Frame Material | Aluminum |
| Suspension Type | No Suspension |
| Special Features | Durable, Lightweight, Adjustable Handlebars, Quick-release Wheels, Adjustable Saddle |
| Included Components | Bell, Reflectors, Training Wheels |
| Braking System | Caliper |
| Power Source | Pedal |
| Skill Level | Beginner |
| Item Weight | 8.6 Kilograms |
| Maximum Recommended Weight | 30 Kilograms |
| Assembly Required | Yes |
| Minimum User Height | 14 Inches (for 14-inch model) |
| Model Number | 8721082969413 |
| Model Name | Bike Kids Pink |
| Country of Origin | China |

Image: Side view of the Deryan 3-in-1 Kids Bicycle with training wheels, showing overall dimensions (100 cm length, 62.5 cm height, 40 cm wheel width).
Warranty
The Deryan 3-in-1 Kids Bicycle comes with a 1-year product warranty from the date of purchase. This warranty covers manufacturing defects under normal use. Please retain your proof of purchase for warranty claims. For specific terms and conditions, refer to the warranty documentation included with your product or contact Deryan customer support.
Support
For any questions, technical assistance, or support regarding your Deryan 3-in-1 Kids Bicycle, please contact Deryan customer service. You can also visit the official Deryan store for more information and product updates: